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2499 Cards in this Set

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Current-Limiting Overcurrent
Protective Device
A device that, when interrupting currents in its current-limiting range, reduces the current flowing in the faulted circuit to a magnitude substantially less than that obtainable in the same circuit if the device were replaced with a solid conductor having comparable impedance.
Curtain Coating
A process by which an object or material is coated by passing it through a vertically flowing film of liquid.
Curtained Area
An area of a building that has its perimeter delineated by draft curtains, full height partitions, exterior walls, or any combinations thereof.
Curtain (Rolling Steel Fire
Door)
Interlocking curtain slats assembled together.
Curtain Slats
Formed sheet steel members that, when interlocked together, form the rolling steel door curtain.
Cut-Away Damper
A restricting airflow device that, when placed in the maximum closed position, allows a minimum amount of airflow past the restriction.
Cutoff Room
A room within a building and having at least one exterior wall.
Cutoff Storage
Storage in the same building or inside area but physically separated from incompatible materials by partitions or walls, or storage in a fixed tank.
Cutout
An assembly of a fuse support with either a fuseholder, fuse carrier, or disconnecting blade. The fuseholder or fuse carrier may include a conducting element (fuse link), or may act as the disconnecting blade by the inclusion of a nonfusible member.
Cutout Box
An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the box proper.
Cutout Box
An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the box proper. [70, 2008]
Cut Sheet
A document that specifies the dimensions, slope, and other pertinent information regarding a particular excavation.
Cut Station
A functional area or sector that utilizes lumber, timber, and an assortment of hand and power tools to complete operational objectives for stabilizing or shoring at a rescue incident or training evolution.
Cutter
A powered rescue tool with at least one movable blade that is used to cut, shear, or sever material.
Cyclone
A cylindrical type of dust collector used to separate particulates from the air stream by centrifugal force, having an enclosure of circular cross-section, a tangential air and material inlet, an air exhaust outlet, and a material discharge.
Cylinder
A container constructed, inspected, and maintained in accordance with DOT and Transport Canada regulations or ANSI/IAS NGV2, Basic Requirements for Compressed Natural Gas Vehicle (NGV) Fuel Containers.
Cylinder
A container designed, constructed, tested, and marked in accordance with U.S. Department of Transportation specifications, Title 49, Code of Federal Regulations, or in accordance with a valid DOT exemption.
Cylinder
A portable compressed gas container, fabricated to or authorized for use by the U.S. Department of Transportation (DOT), or fabricated to Transport Canada (TC) or the ASME Boiler and Pressure Vessel Code, Section VIII, Rules for the Construction of Unfired Pressure Vessels.
Cylinder
A pressure vessel designed for absolute pressures higher than 276 kPa (40 psi) and having a circular cross-section. It does not include a portable tank, multiunit tank car tank, cargo tank, or tank car. [55,
2005]
Cylinder
A pressure vessel designed for pressures higher than 276 kPa (40 psia)
and having a circular cross-section. It does not include a portable
tank, multiunit tank car tank, cargo tank, or tank car.
Cylinder
A pressure vessel designed for pressures higher than 40 psia (276 kPa)
and having a circular cross-section. It does not include a portable
tank, multiunit tank car tank, cargo tank, or tank car.
[55, 2005]
Cylinder
A supply tank containing high-pressure gases or gas mixtures at pressures that can be in excess of 2000 psi gauge (13.8 kPa gauge). (GAS)
Cylinder
For recreational vehicles, a portable container constructed in accordance with U.S. Department of Transportation Specifications for LP-Gas Containers (49 CFR) or fabricated to Transport Canada (TC).
Cylinder Containment System
A gastight recovery system comprised of equipment or devices that can be placed over a leak in a compressed gas container, thereby stopping or controlling the escape of gas from the leaking container.
Cylinder Containment System
A gastight recovery system comprised of equipment or devices that can be placed over a leak in a compressed gas container, thereby stopping or controlling the escape of gas from the leaking container. [55, 2005]
Cylinder Containment Vessel
A gastight recovery vessel designed so that a leaking compressed gas container can be placed within its confines, thereby encapsulating the leaking container.
Cylinder Containment Vessel
A gastight recovery vessel designed so that a leaking compressed gas container can be placed within its confines, thereby encapsulating the leaking container. [55, 2005]
Cylinder Links
The mechanisms that can be used in connecting an articulating boom to the end of the upper elevating cylinders or to the lower and upper booms.
Cylinder Pack
An arrangement of cylinders into a cluster where the cylinders are confined into a grouping or arrangement with a strapping or frame system and connections are made to a common manifold. The frame system is allowed to be on skids or wheels to permit movement.
Cylinder Storage
Cylinders of compressed gas standing by on the site (not those in use or attached ready for use).
Dalle Glass
A decorative composite glazing material made of individual pieces of glass that are embedded in a cast matrix of concrete or epoxy.
Damage Assessment
An appraisal or determination of the effects of the disaster on human, physical, economic, and natural resources.
Damage Control Locker/ Emergency Gear Locker
A locker used for the storage of emergency equipment.
Damage Limitation Plan
Written procedures that outline and prioritize the actions to take following a disaster to minimize property damage and loss.
Damage-Limiting Construction
A building construction method that incorporates exterior wall or roof sections, or both, designed to relieve deflagration pressures without jeopardizing the structural integrity of the building and without allowing the deflagration to propagate into adjacent interior spaces.
Damage-Limiting Construction
Any set of construction elements which will act to limit damage from an explosion, including open structures, pressure-relieving construction, or pressure-resistant construction. These features can be individual or in combination.
Damage-Limiting Construction
For the purposes of this code, any set of construction elements, used individually or in combination, which will act to limit damage from an explosion, including open structures, pressure relieving construction, or pressure resistant construction.
Damage-Limiting Construction
For the purposes of this code, any set of construction elements, used individually or in combination, which will act to limit damage from an explosion, including open structures, pressure relieving construction, or pressure resistant construction. [30, 2008]
Damper
A valve or plate for controlling draft or flow of gases, including air.
Damper
A valve or plate for controlling draft or the flow of gases, including air.
Damper
A valve or plate for controlling draft or the flow of gases, including air. [853, 2003]
Damper
A valve or plate for controlling draft or the flow of gases, including air. [853, 2007]
Dangerous
That situation where the stresses in any member due to dead and live loads exceed 150 percent of the stresses allowed in the member or material.
Dangerous Goods
Articles or substances that are capable of posing a significant risk to health, safety, or property when transported by air and that are classified and outlined in the International Air Transport Association (IATA) Dangerous Goods Manual/ Regulations.
Dangerous Goods
This term is synonymous with the terms hazardous materials and restricted articles. The term is used internationally in the transportation industry and includes explosives and any other article defined as a combustible liquid, corrosive material, infectious substances, flammable compressed gases, oxidizing materials, poisonous articles, radioactive materials, and other restrictive articles.
Dash-Bond Coat (of plaster)
A thick, wet mixture of aggregate and portland cement mixed in proportions of two parts aggregate to one part portland or plastic cement, dashed onto a monolithic surface to improve the mechanical key for subsequent plaster coats.
Data Communications Cables
The shield of data communication cables can be connected to the equipment-grounding conductor at either one end of the cable (single end) or at both ends (double ended). When both ends of a shield are grounded, another shield should be provided inside the outer shield and that one single end grounded.
Data Conversion
The process of developing the input data set for the assessment method of choice.
Data Conversion
The process of developing the input data set for the assessment method of choice. [101, 2003]
Data Conversion
The process of developing the input data set for the assessment method of choice. [101, 2006]
Data Conversion
The process of developing the input data set for the assessment method of choice. [101, 2009]
Day Box
A Type 3 magazine.
Day-Care Home
A building or portion of a building in which more than 3 but not more than 12 clients receive care, maintenance, and supervision, by other than their relative(s) or legal guardian(s), for less than 24 hours per day. [101, 2009]
Day-Care Home
A building or portion of a building in which more than 3 but not more than 12 clients receive care, maintenance, and supervision, by other than their relative(s) or legal guardians(s), for less than 24 hours per day.
Day-Care Home
A building or portion of a building in which more than three but not more than 12 clients receive care, maintenance, and supervision, by other than their relative(s) or legal guardians(s), for less than 24 hours per day. [101, 2006] (SIG-HOU)
Day-Care Occupancy
An occupancy in which four or more clients receive care, maintenance, and supervision, by other than their relatives or legal guardians, for less than 24 hours per day.
Day-Care Occupancy
An occupancy in which four or more clients receive care, maintenance, and supervision, by other than their relatives or legal guardians, for less than 24 hours per day. [5000, 2009]
Day-Care Occupancy
An occupancy in which four or more clients receive care, maintenance, and supervision, by other than their relatives or legal guardians, for less than 4 hours per day. [101, 2006]
Day Fuel Tank
A fuel tank, located inside a structure, that provides fuel to the engine.
dBA
Decibel, “A” scale.
Dead-End Corridor
A passageway, or portion thereof, from which there is only one means of egress.
Dead Front
Without live parts exposed to a person on the operating side of the equipment.
Dead Front (as applied to switches, circuit breakers, switchboards, and distribution panelboards)
Designed, constructed, and installed so that no current-carrying parts are normally exposed on the front.
Dead Load
The weight of the aerial device structure and all materials, components, mechanisms, or equipment permanently fastened thereto.
Dead Loads
Dead loads consist of the weight of all materials of construction incorporated into the building including but not limited to walls, floors, roofs, ceilings, stairways, built-in partitions, finishes, cladding and other similarly incorporated architectural and structural items, and fixed service equipment including the weight of cranes. [ASCE/SEI 7:3.1]
Deadman Control
A device that requires a positive continuing action of a person to allow the flow of fuel.
Debilitating Illness or Injury
A condition that temporarily or permanently prevents a member of the fire department from engaging in normal duties and activities as a result of illness or injury.
Debilitating Illness or Injury
A condition that temporarily or permanently prevents a member of the fire department from engaging in normal duties and activities as a result of illness or injury. [1500, 2007]
Decide Action
Determine a proper reaction given the communication of the existence of a fire.
Deck
An exterior floor supported on at least two opposing sides by an adjacent structure and/or posts, piers, or other independent supports.
Deck
A platform (floor) extending horizontally from one side of a ship to the other.
Deck
In merchant vessels, a horizontal division in a vessel’s structure.
Deck
The upholstered support under the seat cushion in a loose seat construction.
Deck Covering
A material applied to a deck for purposes of increasing the fire or thermal endurance of the deck.
Deck Finish
The final exposed surface of the deck.
Deck Overlay
A material used for leveling purposes or for creating a suitable surface for application of deck finish.
Decomposition Vent
A vent to permit the escape of gases resulting from partial burning or decomposition of nitrate film.
Decompression Sickness
A syndrome due to evolved gas in the tissues resulting from a reduction in ambient pressure. [99, 2005 (HYP)]
Decompression Sickness
A syndrome due to evolved gas in the tissues resulting from a reduction in ambient pressure. (HYP)
Decontamination
The act of removing contaminates from protective clothing and equipment by a physical, chemical, or combined process. (See also
3.3.13, Cleaning.).
Decontamination
The physical and/or chemical process of reducing and preventing the spread of contaminants from people, animals, the environment, or equipment involved at hazardous materials/weapons of mass destruction (WMD) incidents.
Decontamination
The physical and/or chemical process of reducing and preventing the spread of contamination from persons and equipment used in a contaminated environment.
Decontamination
The removal of unwanted radioactive substances from personnel, rooms, building surfaces, equipment, and so forth, to render the affected area safe.
Decontamination
The removal or neutralization of a hazardous material from equipment and/or personnel.
Decontamination
The use of physical or chemical means to remove, inactivate, or destroy bloodborne, airborne, or foodborne pathogens on a surface or item to the point where they are no longer capable of transmitting infectious particles and the surface or item is rendered safe for handling, use, or disposal.
Decontamination Corridor
The area usually located within the warm zone where decontamination is performed.
Decorative Appliance for Installation in a Vented Fireplace
A self-contained, freestanding, fuel gas burning appliance designed for installation only in a vented fireplace and whose primary function lies in the aesthetic effect of the flame.
Decorative Glass
A carved, leaded, or Dalle glass or glazing material whose purpose is decorative or artistic, not functional; whose coloring, texture, or other design qualities or components cannot be removed without
destroying the glazing material; and whose surface, or assembly into which it is incorporated, is divided into segments.
Decorative Shroud
A partial enclosure for aesthetic purposes that is installed at the termination of a venting system that surrounds or conceals the chimney or vent cap.
Dedicated Function Fire Alarm
Control Unit
A protected premises fire alarm control unit which is intended to provide operation of a specifically identified fire safety function, such as sprinkler alarm and supervisory control unit or an elevator recall control and supervisory control unit. (SIG-PRO)
Dedicated Function Fire Alarm
System
A protected premises fire alarm system installed specifically to perform fire safety function(s) where a building fire alarm system is not required. (SIG-PRO)
Dedicated Smoke-Control
System
A system that is intended for the purpose of smoke control only, which are separate systems of air moving and distribution equipment that do not function under normal building operating conditions.
Dedicated Smoke-Control
System
Smoke-control systems and components that are installed for the sole purpose of providing smoke control, and upon activation these systems operate specifically to perform the smoke-control function.
Deductive Reasoning
The process by which conclusions are drawn by logical inference from given premises.
Deenergized
Free from any electrical connection to a source of potential difference and from electrical charge; not having a potential different from that of the earth.
Defect
A discontinuity in a part or a failure to function that interferes with the service or reliability for which the part was intended.
Defect
A discontinuity in a part or a failure to function that interferes with the service or reliability for which the part was intended.
[1901, 2003]
Defend
As used in the Tree, safeguard the exposed using only those measures that prevent or control fire impact on the location of the exposed, without acting on the fire itself (see safeguard).
Defend Against Fire Products
Safeguard the exposed using measures that prevent the presence of, or
control the impact of, fire products at the place.
Defend Exposed in Place
Defend the exposed in the place(s) where they were located at the time of
ignition.
Defend the Place (of the
Exposed)
Defend the place occupied by the exposed.
Defense in Depth
A principle aimed at providing a high degree of fire protection by achieving a balance of preventing fires from starting; detecting fires quickly and suppressing those fires that occur, thereby limiting damage; and designing a nuclear power plant to limit the loss of life, property, and environment to fire and to ensure continuity of nuclear power plant operation and safe shutdown capability.
Defensible Space
An area as defined by the AHJ [typically a width of 9.14 m (30 ft) or more] between an improved property and a potential wildland fire where combustible materials and vegetation have been removed or modified to reduce the potential for fire on improved property spreading to wildland fuels or to provide a safe working area for fire fighters protecting life and improved property from wildland fire. [1144, 2002]
Defensive Fire Fighting
The mode of manual fire control in which the only fire suppression activities taken are limited to those required to keep a fire from extending from one area to another.
Defensive Fire Fighting
The mode of manual fire control in which the only fire suppression activities taken are limited to those required to keep a fire from extending from one area to another. [600, 2005]
Defensive Operations
Actions that are intended to control a fire by limiting its spread to a defined area, avoiding the commitment of personnel and equipment to dangerous areas.
Deferred Submittals
Those portions of the construction documents and calculations that are not submitted to the authority having jurisdiction with the application for permit, but which are to be submitted at a specified time after the application for permit.
Defibrillation
A system that utilizes a machine-produced electric shock to abolish a life-threatening heart rhythm.
Defibrillation
The delivery of an electrical shock to the heart intended to reverse abnormal electrical activity.
Deficiency
A condition in which the application of a component is not within its designed limits or specifications.
Deficiency
A condition in which the application of the component is not within its designed limits or specifications. [1071, 2006]
Deficiency(ies)
A discontinuity in a part or a failure to function that interferes with the service or reliability for which the part was intended.
Definitions
For the purpose of this standard, the following terms shall be defined as shown in this subsection. [30:1.7.2]
Deflagrable Wood Dust
Wood particulate with a median diameter of 420 microns or smaller (i.e., material that will pass through a U.S. No. 40 Standard Sieve), having a moisture content of less than 25 percent (wet basis).
Deflagration
Propagation of a combustion zone at a velocity that is less than the speed of sound in the unreacted medium.
Deflagration
Propagation of a combustion zone at a velocity that is less than the speed of sound in the unreacted medium. [68, 2002]
Deflagration
Propagation of a combustion zone at a velocity that is less than the speed of sound in the unreacted medium. [68, 2007]
Deflagration
Propagation of a combustion zone at a velocity that is less than the speed of sound in the unreacted medium. [68:3.3]
Deflagration
Propagation of a reaction zone at a velocity that is less than the speed of sound in the unreacted medium.
Deflagration Hazard
A situation where deflagrable wood dust is normally in suspension or can be placed in suspension at concentrations at or above the minimum explosible concentration (MEC).
Deflagration Index
Value indicated by the use of variable, K. (See 3.3.19, KG, and
3.3.20 , KSt.)
Deflagration Isolation
A method employing equipment and procedures that interrupts the propagation of a deflagration flame front past a predetermined point.
Deflagration Pressure
Containment
The technique of specifying the design pressure of a vessel and its appurtenances so they are capable of withstanding the maximum pressures resulting from an internal deflagration.
Deflagration Suppression
The technique of detecting and arresting combustion in a confined space while the combustion is still in its incipient stage, thus preventing the development of pressures that could result in an explosion.
Deflection
The deviation from a straight course or fixed direction.
Deflector Vane
An airfoil-shaped vane along the bottom of the hood face that directs incoming air across the work surface to the lower baffle opening. The opening between the work surface and the deflector vane is open even with the sash fully closed.
Deformation
Abnormal wear, defects, cracks or fractures, warpage, and deviations from the original condition that would affect safe and correct operation.
Deformation
Abnormal wear, defects, cracks or fractures, warpage, and deviations from the original condition that would affect safe and correct operation. [1915, 2000]
Degassing
The process of collecting, oxidizing, or treating vapors and gases expelled from a tank or vessel to prevent or reduce the amount of organic volatile compounds released into the atmosphere during vapor- and gas-freeing operations. [API 2015, 3.2.10]
Degradation
(1) A chemical action involving the molecular breakdown of a protective clothing material or equipment due to contact with a chemical. (2) The molecular breakdown of the spilled or released material to render it less hazardous during control operations.
Degree
A formal recognition of completion of a prescribed program of study at the postsecondary level.
Degree-Granting Entity
An accredited institution of postsecondary education that is authorized to award degrees.
Delamination
The separation of the cover or liner from the textile reinforcement.
Delay Composition
A chemical mixture that, upon burning and without explosion, is used to provide a delay between the thrust and ejection phases.
Delinquency Signal
A signal indicating the need for action in connection with the supervision of guards or system attendants. (SIG-PRO)
Deluge Sprinkler System
A sprinkler system employing open sprinklers that are attached to a piping system that is connected to a water supply through a valve that is opened by the operation of a detection system installed in the same areas as the sprinklers. When this valve opens, water flows into the piping system and discharges from all sprinklers attached thereto.
Deluge Sprinkler System
A sprinkler system employing open sprinklers that are attached to a piping system that is connected to a water supply through a valve that is opened by the operation of a detection system installed in the same areas as the sprinklers. When this valve opens, water flows into the
piping system and discharges from all sprinklers attached thereto. [13,
2007]
Deluge System
An open fixed fire suppression system activated either manually or automatically.
Deluge System
A water mist system using open nozzles attached to a piping system that is connected to a water supply through a valve that is opened by means of a detection system installed in the same area as the mist nozzles. When the valve opens, water flows into the piping system and discharges through all nozzles attached to the system.
Deluge Valve
A type of system actuation valve that is opened by the operation of a detection system installed in the same areas as the spray nozzles or by remote manual operation supplying water to all spray nozzles.
Deluge Valve
A water supply control valve intended to be operated by actuation of an automatic detection system that is installed in the same area as the discharge devices. Each deluge valve is intended to be capable of automatic and manual operation.
Demand Calculation Method
Hydraulic calculation procedure for determining the minimum theoretical flow and pressure required to produce a minimum specified total discharge from a specific configuration of piping and discharge devices.
Demand Factor
The ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration.
Demand Zone Levels
An area used to define or limit the management of a risk situation.
Demobilization Unit
Functional unit within the planning section responsible for ensuring orderly, safe, efficient demobilization of resources committed to the incident or planned event.
Demolition
Dismantling or razing of all or part of a building and all operations incidental thereto.
Demonstrate
To show by actual performance.
Demonstration
The act of showing a skill.
Demulsification
A process either physical or chemical by which an emulsion is broken down to its original constituents.
Denial of Service Attack
An attack on a computer system or network with the objective of causing a loss of service to some or all users, by saturating the system or network with useless traffic, making it impossible for legitimate users of the system to use the facility.
Densely Packed Baled Cotton
Cotton, made into banded bales, with a packing density of at least 22 lb/ft3 (360 kg/m2), and dimensions complying with the following: a length of 55 in. (ca. 1400 mm ± 20 mm), a width of 21 in. (ca. 530 mm
± 20 mm), and a height of 27.6 in. to 35.4 in. (700 mm to 900 mm).
Density
The number of camping unit sites on a unit of land area.
Density
The unit rate of water application to an area or surface expressed in gpm/ft2 [(L/min)/m2].
Density
The weight of a substance per unit volume, usually specified at standard temperature and pressure. The density of water is approximately 1 gram per cubic centimeter. The density of air is approximately 1.275 grams per cubic meter.
Department Operations
Center (DOC)
An operations center established by an individual agency to manage that agency’s resources and coverage within the jurisdiction.
Departure
An aircraft taking off from an airport.
Deployment
The procedures by which resources are distributed throughout the service area.
Depressed Highway
An uncovered, below-grade highway or boat section where walls rise to the grade surface and where emergency response access is usually limited.
Deputy
A fully qualified individual who, in the absence of a superior, could be delegated the authority to manage a functional operation or perform
a specific task.
Deputy
A fully qualified individual who, in the absence of a superior, could be delegated the authority to manage a functional operation or perform
a specific task. [1561, 2008]
Derived Channel
A signaling line circuit that uses the local leg of the public switched network as an active multiplex channel while simultaneously allowing that leg’s use for normal telephone communications. (SIG-SSS)
Descending a Line
A means of traveling down a fixed line using a descent control device.
Descending (Line)
A means of safely traveling down a fixed line using a descent control device.
Descent Control Device
An auxiliary equipment item; a friction or mechanical device utilized with rope to control descent.
Descent Control Device
An auxiliary equipment item; a friction or mechanical device utilized with rope to control descent. [1983, 2006]
Descent Control Device
An auxiliary equipment system component; a friction or mechanical device utilized with rope to control descent. [1983:1.3]
Describe
To explain verbally or in writing using standard terms recognized by the hazardous materials/weapons of mass destruction (WMD) response community.
Describe
To explain verbally or in writing using standard terms recognized in the hazardous materials response community.
Designated Area
A permanent location designed or approved for hot work operations.
Designated Critical Operations
Areas (DCOA)
Areas within a facility or site designated as requiring critical operations power.
Designated Employee
An employee who is not a member of an industrial fire brigade but who has been trained to use portable fire extinguishers or small hose lines to fight incipient fires in the employee’s immediate work area.
Designated Length
The length marked on the ladder.
Designated Length
The length marked on the ladder. [1931:3.3]
Design Application Density
(g/m3)
Extinguishing application density, including a safety factor, required for system design purposes.
Design Certification
The process by which a product is evaluated and tested by an independent laboratory to affirm that the product design complies with specific requirements.
Design Depth of the Smoke
Layer
The difference between the height of the ceiling and the minimum height of the smoke layer boundary above the finished floor level that meets design objectives.
Design Discharge
The rate of water discharged by an automatic sprinkler expressed in gpm (mm/min).
Design Earthquake
The earthquake effects that are two-thirds of the corresponding maximum considered earthquake. [ASCE/SEI 7:11.2]
Design Factor (DF)
A fraction of the agent minimum design quantity (MDQ) added thereto deemed appropriate due to a specific feature of the protection application or design of the suppression system.
Design Fire
As used in this standard, the time-rate heat release history selected as the input for the calculations prescribed herein.
Design Fire Scenario
A fire scenario selected for evaluation of a proposed design.
Design Fire Scenario
A fire scenario selected for evaluation of a proposed design. [914, 2007]
Design Fire Scenario
A fire scenario used for evaluation of a proposed design. [914, 2001]
Design Flood
The greater of either (1) the base flood or (2) the flood so designated by the jurisdiction as its regulatory flood, with a 1 percent chance, or less, of being equaled or exceeded in any given year.
Design Flood
The greater of either (1) the base flood or (2) the flood so designated by the jurisdiction as its regulatory flood, with a 1 percent chance, or less, of being equaled or exceeded in any given year. [5000, 2003]
Design Flood Elevation (DFE)
The elevation of the design flood, including wave height, relative to the datum specified on a jurisdiction’s flood hazard map.
Design Flood Elevation (DFE)
The elevation of the design flood, including wave height, relative to the datum specified on a jurisdiction’s flood hazard map.
[5000, 2003]
Design Full Load Mass Airflow
The air flow required to achieve nameplate full load. For the purposes of Chapter 6, Multiple Burner Boilers, it is the flow required to
achieve nameplate full load based on the original design fuel as defined by the boiler equipment manufacturer.
Design Interval Time
The duration of time for which a design objective is to be met, measured from the time of detector activation.
Design Load
The load for which a given piece of equipment or manufactured system was engineered for under normal static conditions.
Design Plan
The plan for a flame effect appliance or design that presents the design criteria and/or assumptions used in the design, along with complete design information.
Design Pressure
The maximum operating pressure permitted by this code, as determined by the design procedures applicable to the materials involved.
Design Pressure
The pressure used in the design of equipment, a container, or a pressure vessel for the purpose of determining the minimum allowable thickness or physical characteristics of its parts.
Design Pressure Difference
The desired pressure difference between the protected space and an adjacent space measured at the boundary of the protected space under a specified set of conditions with the smoke-control system operating.
Design Pressure (p)
Equivalent static pressure to be used in the determination of wind loads for buildings. [ASCE/SEI 7:6.2]
Design Specification
A building characteristic and other conditions that are under the control of the design team.
Design Specification
A building characteristic and other conditions that are under the control of the design team. [5000, 2006]
Design Specification
A building characteristic and other conditions that are under the control of the design team. [5000, 2009]
Design Specifications
A building’s characteristics and other conditions that are under the control of the design team.
Design Specifications
Building characteristics and other conditions that are under the control of the design team. [914, 2001]
Design Strength
The product of the nominal strength and a resistance factor, Φ. [ASCE/SEI 7:1.2]
Design Team
A group of stakeholders including, but not limited to, representatives of the architect, client, and any pertinent engineers and other designers.
Design Team
A group of stakeholders including, but not limited to, representatives of the architect, client, and any pertinent engineers and other designers. [101, 2003]
Design Team
A group of stakeholders including, but not limited to, representatives of the architect, client, and any pertinent engineers and other designers. [101, 2006]
Design Team
A group of stakeholders including, but not limited to, representatives of the architect, client, and any pertinent engineers and other designers. [101, 2009]
Design Verification Tests
Tests of a ladder structure and components thereof that are performed by the ladder manufacturer to prove conformance to design requirements and which can potentially compromise the integrity of the tested ladder.
Desolventized Material
Material from which all absorbed solvent has been removed.
Desolventizer
Equipment that removes the absorbed solvent from the material being processed.
Detached Building
A separate building that is separated from other structures or uses as required by NFPA 5000 for a freestanding structure.
[5000, 2003]
Detached Building
A separate building that is separated from other structures or uses as required by this Code for a freestanding structure.
Detached Storage
Storage in a separate building or in an outside area located away from all structures.
Detached Storage
Storage in either an open outside area or a separate building containing no incompatible materials and located away from all other structures.
Detachment
Locating a combustible particulate solid process in the open air or in a separate building.
Detect Fire (Automatically)
Identify the presence of fire without reliance on human observation.
Detect Fire (to Manually
Suppress Fire)
Identify the presence of fire either by human observation or by
automatic mechanism(s).
Detection
(1) Sensing the existence of a fire, especially by a detector from one or more products of the fire, such as smoke, heat, infrared radiation, and the like. (2) The act or process of discovering and locating a fire.
Detection Devices
Electrical, pneumatic, thermal, mechanical, or optical sensing instruments, or subcomponents of such instruments, whose purpose is to cause an automatic action upon the occurrence of some
preselected event.
Detection System
A system consisting of detectors; controls; control panels; automatic and manual actuating mechanisms; all wiring, piping, and tubing; and all associated equipment that is used to actuate an extinguishing system.
Detection System
A system consisting of detectors; controls; control panels; automatic and manual actuating mechanisms; all wiring, piping, and tubing; and all associated equipment that is used to actuate an extinguishing system. [409:3.3]
Detect Need
Recognize that the exposed are susceptible to a harm.
Detector
A device suitable for connection to a circuit that has a sensor that responds to a physical stimulus such as heat or smoke. [72, 2007]
Detector
A device suitable for connection to a circuit that has a sensor that responds to a physical stimulus such as heat or smoke. (SIG-IDS)
Detention and Correctional
Occupancy
An occupancy used to house four or more persons under varied degrees of restraint or security where such occupants are mostly incapable of self-preservation because of security measures not under the occupants’ control. [101:3.3]
Detention and Correctional
Occupancy
An occupancy used to house four or more persons under varied degrees of restraint or security where such occupants are mostly incapable of self-preservation because of security measures not under the occupants’ control. [101, 2006]
Detention and Correctional
Occupancy
An occupancy used to house one or more persons under varied degrees of restraint or security where such occupants are mostly incapable of self-preservation because of security measures not under the occupants’ control.
Detention and Correctional
Occupancy
An occupancy used to house one or more persons under varied degrees of restraint or security where such occupants are mostly incapable of self-preservation because of security measures not under the occupants’ control. [5000, 2009]
Detention and Correctional
Residential Housing Area
Sleeping areas and any contiguous day room, group activity space, or other common space for customary access of residents.
Detention and Correctional
Use Condition
For application of the life safety requirements in Section 20.7, the resident user category is divided into the five use conditions.
Determination of Flash Point
The flash point of a liquid shall be determined according to the methods specified in this subsection. [30:1.7.4]
Deterministic Approach
A deterministic approach establishes requirements for engineering margin and quality assurance in design, manufacture, and construction. It involves implied, but unquantified, elements of probability in the selection of the specific accidents to be analyzed as design basis events. It does not integrate results in a comprehensive manner to assess the overall impact of postulated initiating events.
Deterministic Model
A model whose outputs are not probabilities or probability distributions;
that is, they do not quantify uncertainty.
Deterrent
Any physical or psychological device or method that discourages action.
Detonating Cord
A flexible cord containing a center core of high explosive used to detonate other explosives.
Detonation
An exothermic reaction wherein the reaction propagates through the unreacted material at a rate exceeding the velocity of sound, hence the explosive noise. (GAS)
Detonation
Propagation of a combustion zone at a velocity that is greater than the speed of sound in the unreacted medium.
Detonation
Propagation of a combustion zone at a velocity that is greater than the speed of sound in the unreacted medium. [68, 2007]
Detonation
Propagation of a combustion zone at a velocity that is greater than the speed of sound in the unreacted medium. [68:3.3]
Detonation
Propagation of a reaction zone at a velocity that is at or above the speed of sound in the unreacted medium.
Detonator
Any device containing an initiating or primary explosive that is used for initiating detonation.
Detraining Load
The number of passengers alighting from a train at a platform.
Detrimental Event
An incident or circumstance that produces or threatens to produce undesirable consequences to persons, property, or the environment that might ultimately be measured in terms of economic or financial loss.
Develop
Modification, expansion, or compilation of existing educational or informational materials or resources.
Developed Campground
A campground with two or more recreational vehicle or recreational park trailer unit sites accessible by vehicular traffic, where sites are substantially developed and refuse disposal systems, flush toilets, bathing facilities, and water are provided.
Developed Space
An area of the subterranean space that has been altered for the use of advanced industrial capability, technological sophistication, or economic productivity.
Development
Any man-made changes to improved or unimproved real estate.
Development (Flood
Resistance)
Any man-made changes to improved or unimproved real estate including, but not limited to, buildings or other structures, temporary or permanent storage of materials, mining, dredging, filling, grading, paving, excavation, drilling, or other land-disturbing activities.
Device
A unit of an electrical system that carries or controls electric energy as its principal function.
Device
A unit of an electrical system that carries or controls electric energy as its principal function. [70, 2008]
Device
A unit of an electrical system that is intended to carry or control but not utilize electric energy. [70:100]
Dewatering
The process of removing water from a vessel.
Dewatering Equipment
Electric- or fuel-powered pumps, hose, and appliances that are used in combination to remove water.
Dew Point
As applied to the combustion products produced by oil-burning appliances, the temperature below which components of the combustion products will condense on exposed surfaces.
Dew Point (at Container
Pressure)
The dew point value of the gas at the maximum anticipated container pressure of the CNG or GH2 vehicular fuel system usually measured in the container prior to pressure reduction.
Diagnosis
The determination of the cause of a problem.
Diagnostic Check
An in-depth operational analysis of a system or component to verify that it is operating correctly.
Diagonal Opposite Wheel
Motion
The measurement of the vertical movement relationship of the wheel and suspension travel.
Diagonal Tie
A tie intended to resist horizontal or shear forces and to resist vertical, uplift, and overturning forces.
Diameter
The length of a straight line passing through the center of a cycle, terminating at the periphery.
Diameter
The nominal inside diameter designated commercially.
Diameter (Rope)
The length of a straight line through the center of the cross section of the rope.
Dielectric Heating
Heating of a nominally insulating material due to its own dielectric losses when the material is placed in a varying electric field.
Dielectric Heating System
A heating system similar to an induction heater, but using frequencies that generally are higher (3 MHz or more) than those used in induction heating.
Dielectric Test Plane
A plane that runs diagonally through the headform from the intersection of the test line and midsagittal plane in the front of the headform to the intersection of the reference plane and midsagittal plane in the rear of the headform.
Diesel Engine
An internal combustion engine in which the fuel is ignited entirely by the heat resulting from the compression of the air supplied for combustion. The oil-diesel engine, which operates on fuel oil injected after compression is practically completed, is the type usually used as a fire pump driver.
Diesel-Powered Equipment
Any device powered by a diesel engine.
Diesel-Powered Equipment
Any device powered by a diesel engine. [122:3.3]
Differential Flow Switch
A switch that is activated by the flow of a gaseous or liquid fluid. This flow is detected by measuring pressure at two different points to produce a pressure differential across the sensor.
Differential Global
Positioning System (DGPS)
A technique applied to a global positioning system (GPS) solution that improves the accuracy of that solution.
Different Intrinsically Safe
Circuits
Intrinsically safe circuits in which the possible interconnections have not been evaluated and identified as intrinsically safe.
Diffusion Flame
A flame in which fuel and air mix or diffuse together at the region of combustion.
Diffusion Pump
A vacuum pump in which a stream of heavy molecules, such as those of mercury or oil vapor, carries gas molecules out of the volume being evacuated.
Digester Gas
Gas obtained as a by-product from a controlled anaerobic sludge digestion unit process from the decomposition of organic matter.
Digester Gas
The biogas derived by fermentation of organic wastes, such as sewage, animal and food waste, and industrial organic waste.
Digital
Operated by the use of discrete signals to represent data in the form of numbers or other characters.
Digital Alarm Communicator
Receiver (DACR)
A system component that accepts and displays signals from digital alarm communicator transmitters (DACTs) sent over the public switched telephone network. (SIG-SSS)
Digital Alarm Communicator
System (DACS)
A system in which signals are transmitted from a digital alarm communicator transmitter (DACT) located at the protected premises through the public switched telephone network to a digital alarm communicator receiver (DACR). (SIG-SSS)
Digital Alarm Communicator
Transmitter (DACT)
A system component at the protected premises to which initiating devices or groups of devices are connected. The DACT seizes the connected telephone line, dials a preselected number to connect to a DACR, and transmits signals indicating a status change of the initiating device. (SIG-SSS)
Digital Alarm Radio Receiver
(DARR)
A system component composed of two subcomponents: one that receives and decodes radio signals, the other that annunciates the decoded data. These two subcomponents can be coresident at the central station or separated by means of a data transmission channel. (SIG-SSS)
Digital Alarm Radio System
(DARS)
A system in which signals are transmitted from a digital alarm radio transmitter (DART) located at a protected premises through a radio channel to a digital alarm radio receiver (DARR). (SIG-SSS)
Digital Alarm Radio
Transmitter (DART)
A system component that is connected to or an integral part of a digital alarm communicator transmitter (DACT) that is used to provide an alternate radio transmission channel. (SIG-SSS)
Digital Imaging System (DIS)
A video system in which a digital video signal travels from the camera and can be viewed by any authorized user at or away from the protected premises.
Digital Radio System
A radio system that uses a binary representation of audio from one radio to another.
Dike
A structure used to establish an impounding area or containment.
Dike
A structure used to establish an impounding area or containment. [52, 2006]
Diluent
A gas used to dilute or reduce the concentration of oxygen.
Dilution Air
Air that enters a draft hood or draft regulator and mixes with the flue gases.
Dilution Air
The air that enters the relief opening of a draft hood or draft diverter or the air that enters another opening in an appliance flue or venting system.
Dilution Flue
A passage designed to effect the dilution of flue gases with air before discharge from an appliance.
Dip Coating
A process by which objects or materials are immersed in a liquid coating.
Dips
Depression or cuplike places in horizontal duct runs in which liquids could accumulate.
Dip Tank
A tank, vat, or container of flammable or combustible liquid into which objects or materials are immersed for the purpose of coating, cleaning, or similar processes.
Direct Attack
Fire-fighting operations involving the application of extinguishing agents directly onto the burning fuel.
Direct Catalytic Oxidizer
A combustion system in which the burner(s) directly heats volatile organic compounds (VOCs) or hydrocarbons (HCs) to the destruction temperature, prior to their introduction to a destruction
catalyst, without heat recovery to the incoming gases, and in which the catalytic destruction temperature is lower than the non-catalytic
(direct thermal) destruction temperature.
Direct Contact
Contact of persons with live parts.
Direct Current (dc) Grounded
Conductor
A current-carrying conductor connected to the side of the power source that is intentionally maintained at boat ground potential.
Direct Current (dc) Grounding
Conductor
A normally noncurrent-carrying conductor used to connect metallic noncurrent-carrying parts of a direct current device to the engine negative terminal or its bus for the purpose of minimizing stray current corrosion.
Direct Electrical Pathway to the Heart
An externalized conductive pathway, insulated except at its ends, one end of which is in direct contact with heart muscle while the other is outside the body and is accessible for inadvertent or intentional contact with grounded objects or energized, ground-referenced sources. (ELE)
Direct Exterior Window
A window in a communications center that faces an area that is not part of the secure area assigned solely to the communications center or that is accessible to the public.
Direct-Fired Air Makeup Unit
A Class B fuel-fired heat utilization unit operating at approximately atmospheric pressure used to heat outside replacement air for the process.
Direct-Fired Appliance
A fuel-burning appliance in which the products of combustion (flue gases) are mixed with the medium (e.g., air) being heated.
Direct-Fired External Heating
System
A heating system in which the burners are in a combustion chamber effectively separated from the work chamber and arranged so that products of combustion from the burners are discharged into the work chamber by a circulating fan or blower.
Direct-Fired Internal Heating
System
A heating system in which the burners are located within the work chamber.
Direct-Fired Heating System
A heating system in which the products of combustion enter the work chamber.
Direct Fired System (Unit
System)
A system in which the fuel is pulverized and delivered in suspension directly to the burner(s).
Direct-Fired Vaporizer
A vaporizer in which heat furnished by a flame is directly applied to some form of heat exchange surface in contact with the liquid LP-Gas to be vaporized. This classification includes submerged-combustion vaporizers.
Direct-Fired Vaporizer
A vaporizer in which heat furnished by a flame is directly applied to some form of heat exchange surface in contact with the liquid LP-Gas to be vaporized. This classification includes submerged-combustion vaporizers. [58, 2008]
Direct Gas-Fired Nonrecirculating Industrial Air Heater
A nonrecirculating industrial air heater in which all the products of combustion generated by the appliance are released into the outdoor airstream being heated.
Direct Gas-Fired Recirculating
Industrial Air Heater
An air recirculating heater in which all of the products of combustion generated by the appliance are released into the airstream being heated.
Direct Gas-Fired Tank Heater
A gas-fired device that applies hot gas from the heater combustion chamber directly to a portion of the container surface in contact with LP-Gas liquid.
Direct Ignition
An automatic or manual ignition system that ignites fuel without a pilot.
Direct Immersion Electric
Vaporizer
A vaporizer wherein an electric element is immersed directly in the
LP-Gas liquid and vapor.
Direct Immersion Electric
Vaporizer
A vaporizer wherein an electric element is immersed directly in the
LP-Gas liquid and vapor. [58, 2008]
Direct Injection Variable Pump Output Proportioning
A direct injection proportioning system that utilizes flowmeters for foam concentrate and water in conjunction with a variable output foam pump control system.
Directional Blocking
An interlock that, upon detection of a significant error in furnace pressure or HRSG process variables, acts to inhibit the movement of all appropriate final control elements in the direction that would increase the error.
Director
Incident Command System title for individual responsible for supervision of a branch.
Direct or On-Line Medical
Control or Oversight
The clinical advice or instructions given directly to emergency medical services (EMS) personnel by specially trained medical professionals.
Direct Thermal Oxidizer
A combustion system in which the burner(s) directly heats VOCs or HCs to the destruction temperature without heat recovery to the incoming gases.
Direct Vent Appliance (Direct Vent System, Sealed Combustion System Appliance)
A system consisting of an appliance, combustion air and flue gas connections between the appliance and the outside atmosphere, and
a vent cap supplied by the manufacturer, constructed so that all air for combustion and draft control is obtained from the outside
atmosphere and all flue gases are discharged to the outside atmosphere.
Direct Vent Appliances
Appliances that are constructed and installed so that all air for combustion is derived directly from the outdoors and all flue gases are discharged to the outdoors.
Direct Vent Appliance (Sealed Combustion System Appliance)
A system consisting of an appliance, combustion air and flue gas connections between the appliance and the outside atmosphere, and a vent cap supplied by the manufacturer, and constructed so that all air for combustion is obtained from the outside atmosphere and all flue gases are discharged to the outside atmosphere.
Direct-Vented System
A venting system by which all air for combustion is obtained from the outside atmosphere, and all exhaust air/gases are discharged to the outside atmosphere.
Direct Vent Gas Fireplace
A system consisting of (1) an appliance for indoor installation that allows the view of flames and provides the simulation of a solid fuel fireplace, (2) combustion air connections between the appliance and the vent air intake terminal, (3) flue -gas connections between the appliance and the vent-air intake terminal, and (4) a vent air intake terminal for installation outdoors, constructed such that all air for combustion is obtained from the outdoor atmosphere and all flue gases are discharged to the outdoor atmosphere.
Direct Venting System
A venting system that is constructed and installed so that air for combustion and draft control is taken from interior building spaces and all combustion products are discharged to the outside atmosphere.
Direct Vent Wall Furnace
A system consisting of an appliance, combustion air, and flue gas connections between the appliance and the outdoor atmosphere, and a vent cap supplied by the manufacturer and constructed so that all
air for combustion is obtained from the outdoor atmosphere and all flue gases are discharged to the outdoor atmosphere.
Disaster
Within the context of this document, a disaster is defined as any unusual occurrence or unforeseen situation that seriously overtaxes or threatens to seriously overtax the routine capabilities of a health care facility. (HCE)
Disaster/Emergency
Management
An ongoing process to prevent, mitigate, prepare for, respond to, and recover from an incident that threatens life, property, operations, or the environment.
Discharge
The final portion of a duct or pipe where the product being conveyed is emptied or released from confinement; the termination point of
the pipe or duct.
Discharge Device
A device designed to discharge water or foam-water solution in a predetermined, fixed, or adjustable pattern. Examples include, but are not limited to, sprinklers, spray nozzles, and hose nozzles.
Discharge Device
A device designed to discharge water or foam-water solution in a predetermined, fixed, or adjustable pattern. Examples include, but are not limited to, sprinklers, spray nozzles, and hose nozzles.
[16, 2003]
Discharge Device
A device designed to discharge water or foam-water solution or water additive solution in a predetermined, fixed, or adjustable pattern.
Discharge Nozzle
Device from which the extinguishing agent is discharged to provide for suppression of a fire in the designated hazard.
Discharge Nozzle
Device from which the extinguishing agent is discharged to provide for suppression of a fire in the designated hazard.
[17A, 2009]
Discharge Outlet Size
The nominal size of the first fire hose connection from the pump on a discharge.
Discharge Outlet Size
The nominal size of the first fire hose connection from the pump on a discharge. [1901, 2003]
Discharge Port
A passage such as nozzles or openings on an aerosol generator where aerosol is released when the generator is actuated.
Discharge Pressure
The water pressure on the discharge manifold of the fire pump at the point of gauge attachment.
Discharge Site
The area immediately surrounding the fireworks mortars used for an outdoor fireworks display.
Discharging
An operation during which a battery delivers current to an external circuit by the conversion of chemical energy to electric energy.
Disconnecting Means
A device, group of devices, or other means whereby the conductors of a circuit can be disconnected from their source of supply.
[70, 2005]
Disconnecting Means
A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.
Disconnecting Means
A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply. [70:100]
Disconnecting Means
A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.
[70, 2008]
Disconnecting Means
The necessary equipment usually consisting of a circuit breaker or switch and fuses, and their accessories, located near the point of entrance of supply conductors in a recreational vehicle and intended to constitute the means of cutoff for the supply to that recreational vehicle.
Disconnecting Means, Parking
Space
The necessary equipment usually consisting of a circuit breaker or switch and fuses, and their accessories, located near the point of entrance of supply conductors in an electrified truck parking space and intended to constitute the means of cutoff for the supply to that truck.
Disconnecting (or Isolating) Switch (Disconnector, Isolator)
A mechanical switching device used for isolating a circuit or equipment from a source of power.
Disconnecting Trap
A device intended to supervise the position of an air conditioner, small fan, fixed panel, or similar opening against movement in either direction with the use of a conductor or trip cord extended across the opening.
Disconnect Switch
A manually operated switch, electrically supervised and secured from unauthorized use, that prevents the automatic or manual electrical actuation of the aerosol generators during maintenance by electrically opening the releasing circuit.
Discontinuity
A change in the normal, physical structure of a material that can affect its serviceability.
Disentanglement
The cutting of a vehicle and/or machinery away from trapped or injured victims.
Disentanglement
The process of freeing a victim from entrapment.
Disinfectant
An agent that destroys, neutralizes, or inhibits the growth of harmful biological agents.
Disinfection
The process used to inactivate virtually all recognized pathogenic microorganisms but not necessarily all microbial forms, such as bacterial endospore.
Dispatch
To send out emergency response resources promptly to an address or incident location for a specific purpose.
Dispatch Center
A facility from which resources are directly assigned to an incident or planned event.
Dispatch Circuit
A circuit over which a signal is transmitted from the communications center to an emergency response facility (ERF) or emergency response units (ERUs) to notify ERUs to respond to an emergency.
Dispatching
A process by which an alarm answered at the communications center is retransmitted to emergency response facilities (ERFs) or to emergency response units (ERUs) in the field.
Dispatch Radio Channel
A radio channel designated by the emergency services organization that is provided for communications between the communication center and the incident commander or single resource.
Dispatch Time
A discrete time stamp that represents unit notification.
Dispatch Time
The point of receipt of the emergency alarm at the public safety answering point to the point where sufficient information is known to the dispatcher and applicable units are notified of the emergency.
Dispatch Time
The time the responding unit was notified by the telecommunicator.
Dispenser Enclosure
A cabinet that contains process piping and equipment for dispensing fuel.
Dispensing
As applied to gasoline or diesel fuel systems, withdrawing fuel from applicable recreational vehicle fuel tank(s) to other motorized vehicles or approved containers by means of a hose and hose nozzle valve.
Dispensing
The pouring or transferring of a material from a container, tank, or similar vessel whereby vapors, dusts, fumes, mists, or gases could be liberated to the atmosphere.
Dispensing Device, Overhead
Type
A dispensing device that consists of one or more individual units intended for installation in conjunction with each other, mounted above a dispensing area typically within the service station canopy structure, and characterized by the use of an overhead hose reel.
Dispensing Station
A natural gas or hydrogen installation that dispenses CNG, LNG, LGH2, GH2/CNG mixtures, or GH2 from storage containers or a distribution pipeline into fuel supply containers or into portable cylinders by means of a compressor, reformer, vaporizer, or pressure booster.
Dispensing Station
Fixed equipment in which LP-Gas is stored and dispensed into portable containers.
Dispersed Aerosol
An extinguishing medium consisting of fine particles of chemicals, generally less than 10 microns in diameter, already resident inside a pressurized agent storage container, suspended in a halocarbon or an inert gas.
Dispersive Electrode
An electrode, intended to complete the electrical path between patient and appliance and at which no surgical effect is intended. (ELE)
Display
The visual representation of output data, other than printed copy. (SIG-NAS)
Display Fireworks, 1.3G
(Formerly known as Class B, Special Fireworks.) Large fireworks articles designed to produce visible or audible effects for entertainment purposes by combustion, deflagration, or detonation. This term includes, but is not limited to, salutes containing more than 2 gr (130 mg) of explosive composition (salute powder), aerial shells containing more than 60 g (2.1 oz) of total pyrotechnic and explosive composition, and other display pieces that exceed the limits for classification as consumer fireworks, 1.4G.
Display Fireworks
Large fireworks devices that are explosive materials intended for use
in fireworks displays and designed to produce visible or audible effects
by combustion, deflagration, or detonation, as set forth in CPSC 16
CFR 1500 and 1507, 49 CFR 172, and APA Standard 87-1, Standard for
the Construction and Approval for Transportation of Fireworks, Novelties, and
Theatrical Pyrotechnics.
Display Fireworks
Large fireworks devices that are explosive materials intended for use
in fireworks displays and designed to produce visible or audible effects
by combustion, deflagration, or detonation, as set forth in CPSC 16
CFR 1500 and 1507, 49 CFR 172, and APA Standard 87-1, Standard for
the Construction and Approval for Transportation of Fireworks, Novelties, and
Theatrical Pyrotechnics. [1124, 2006]
Display Screen
An electronic device that is capable of displaying text, video, and graphics.
Display Site
The immediate area where a fireworks display is conducted, including the discharge site, the fallout area, and the required separation distance from mortars to spectator viewing areas, but not spectator viewing areas or vehicle parking areas.
D.I.S.S. Connector
A system of noninterchangeable medical gas and vacuum connectors complying with CGA V-5, Diameter-Index Safety System
(Noninterchangeable Low Pressure Connections for Medical Gas Applications). (PIP)
Dissolved Air Flotation
A separation process in which air bubbles emerging from a supersaturated solution become attached to suspended solids in the liquid undergoing treatment and float them up to the surface.
Distillery
A plant or that portion of a plant where liquids produced by fermentation are concentrated and where the concentrated products are also mixed, stored, or packaged.
Distillery
A plant or that portion of a plant where liquids produced by fermentation are concentrated and where the concentrated products are also mixed, stored, or packaged. [30, 2008]
Distributed Integrated
Controls (DIC)
Systems or integrated controls used to monitor and control the functions of equipment, systems, or plants.
Distribution
As applied to gasoline or diesel fuel systems, the flow of fuel from the recreational vehicle fuel tank(s) to an onboard fuel-burning generator by means of a closed system of tubing or hoses.
Distribution Facility
A place where consumer fireworks are received, stored, picked, packaged and packed into shipping cartons, and shipped to other distribution facilities, manufacturing facilities, or CFRS facilities or stores.
Distribution Panelboard
A single panel or group of panel units designed for assembly in the form of a single panel, including buses, and with or without switches and/or automatic overcurrent protective devices for the control of light, heat, or power circuits of small individual as well as aggregate capacity; designed to be placed in a cabinet or cutout box placed in or against a wall or partition and accessible only from the front.
Distribution Point
An electrical supply point from which service drops, service conductors, feeders, or branch circuits to buildings or structures utilized under single management are supplied.
Distributor
A business engaged in the sale or resale, or both of compressed gases or cryogenic fluids, or both.
Distributor
A business engaged in the sale or resale, or both of compressed gases or cryogenic fluids, or both. [55, 2005]
Distributor/Divider
A device that splits a single stream of pulverized coal and primary air into two or more streams.
Dive
An exposure to increased pressure whether underwater or in a hyperbaric chamber.
Divemaster
Dive professional demonstrating an advanced level of competency, charged with coordinating and leading divers.
Dive Operation
A situation requiring divers to complete an assigned task.
Dive Profile
Plan for a dive, including the depth and duration of the dive, in order to determine the level of nitrogen in the bloodstream.
Diver
An individual using breathing apparatus that supplies compressed breathing gas at the ambient pressure.
Diversion Charge Controller
Equipment that regulates the charging process of a battery by diverting power from energy storage to direct-current or alternating-current loads or to an interconnected utility service.
Diversity Factor
Ratio of the maximum probable demand to the maximum possible demand.
Diverter Valve
A valve that, when actuated, diverts hydraulic fluid from one function to another or from one hydraulic system to another; in aerial devices, it is the valve that diverts hydraulic fluid from the hydraulic system for the stabilizers to the hydraulic system for the aerial device when the aerial device is in use and from the hydraulic system for the aerial device to the hydraulic system for the stabilizers when they are being deployed or stowed.
Dive Tables
Format utilized by divers, based upon various accepted studies, which calculates nitrogen levels and converts them to tabular data for determining a safe dive profile.
Dive Team
An organization of public safety divers and members in training.
Division
A supervisory level established to divide an incident into geographic areas of operations.
Division
That organizational level having responsibility for operations within a defined geographic area.
Division Supervisor
A person in a supervisory level position responsible for a specific geographic area of operations at an incident.
Docking Facility
A covered or open, fixed or floating structure that provides access to the water and to which boats are secured.
Documentation
Any data or information supplied by the manufacturer or contractor relative to the apparatus, including information on its operation, service, and maintenance.
Documentation
Any written or electronic data or information relative to the apparatus, including information on its operational checks, diagnostic checks, inspection, maintenance, and performance testing.
Documentation
The process of gathering, classifying, and storing information. [1911, 2007]
Documentation
The process of gathering, classifying, and storing information. [1915, 2000]
Documentation Unit
Functional unit within the planning section responsible for recording/protecting all documents relevant to the incident or planned event.
Domestic Hot Plate
A fuel -gas burning appliance consisting of one or more open-top-type burners mounted on short legs or a base.
Domestic Laundry Stove
A fuel gas burning appliance consisting of one or more open-top-type burners mounted on high legs or having a cabinet base.
Domestic Wastewater
Wastewater derived principally from sources such as dwellings, commercial establishments, and institutions, that might or might not contain small amounts of groundwater, surface water, or storm water.
Donor
An exploding charge producing an impulse that impinges upon an explosive acceptor charge.
Door Assembly
Any combination of a door, frame, hardware, and other accessories that is placed in an opening in a wall that is intended primarily for access or for human entrance or exit.
Door Assembly
Any combination of a door, frame, hardware, and other accessories that is placed in an opening in a wall that is intended primarily for access or for human entrance or exit. [252, 2008]
Door Closer (Swinging)
A labeled device that, where applied to a door and frame, causes an open door to close by mechanical force. The closing speed can be regulated by this device.
Door Holder/Release Device
A labeled, fail-safe device, controlled by a detection device, used on an automatic-closing door to release the door at the time of fire.
Door Protection Plate
Protective material applied to the face of a door and generally made of approximately 0.05 in. (1.2 mm) thick brass, bronze, aluminum, or stainless steel or 1⁄8 in. (3.2 mm) thick laminated plastic.
Dormitory
A building or a space in a building in which group sleeping accommodations are provided for more than 16 persons who are not members of the same family in one room, or a series of closely associated rooms, under joint occupancy and single management, with or without meals, but without individual cooking facilities.
Dormitory
A building or a space in a building in which group sleeping accommodations are provided for more than 16 persons who are not members of the same family in one room, or a series of closely associated rooms, under joint occupancy and single management, with or without meals, but without individual cooking facilities.
[101, 2006] (SIG-HOU)
Dormitory
A building or a space in a building in which group sleeping accommodations are provided for more than 16 persons who are not members of the same family in one room, or a series of closely associated rooms under joint occupancy and single management, with or without meals, but without individual cooking facilities. [101, 2009]
Dormitory
A building or a space in a building in which group sleeping accommodations are provided for more than 16 persons who are not members of the same family in one room, or a series of closely associated rooms, under joint occupancy and single management, with or without meals, but without individual cooking facilities. [101:3.3]
DOT
U.S. Department of Transportation.
DOT
U.S. Department of Transportation. [52, 2006]
DOT
U.S. Department of Transportation. [57, 2002]
DOT-Approved Packaging
Packaging for fireworks complying with the regulations of the U.S. Department of Transportation (DOT), Title 49, Part 178.
DOT Cylinder
A pressure vessel constructed and tested in accordance with Title 49
CFR 178.37 that is used for the storage and transportation of air
under pressure.
DOT Cylinder
A pressure vessel constructed and tested in accordance with Title 49
CFR 178.37 that is used for the storage and transportation of air
under pressure. [1901, 2003]
Double Block and Bleed
The closure of a line, duct, or pipe by closing, locking, and tagging two valves in line and opening, locking, and tagging a drain or vent valve in line between the two closed valves.
Double Bottom
A void or tank space between the outer hull of the vessel and the floor of the vessel.
Double Check Valve Assembly
(DCVA)
This assembly consists of two internally loaded check valves, either spring-loaded or internally weighted, installed as a unit between two tightly closing resilient-seated shutoff valves as an assembly, and fittings with properly located resilient-seated test cocks.
Double Containment
Container
A single containment container surrounded by and within 20 ft (6 m) of a containment wall (secondary container) that is open to the atmosphere and designed to contain LNG in the event of a spill from the primary or inner container.
Double Doorway
A single opening that has no intervening wall space or door trim separating the two doors. (SIG-IDS)
Double Egress Doors
A pair of swinging doors, each leaf of which swings in the opposite direction of the other.
Double-Insulated Appliances
Appliances where the primary means of protection against electrical shock is not grounding. The primary means is by the use of combinations of insulation and separation spacings in accordance with an approved standard. (ELE)
Double Insulation System
An insulation system comprised of basic insulation and supplementary insulation, with the two insulations physically separated and so arranged that they are not simultaneously subjected to the same deteriorating influences (temperature, contaminants, and the like).
Double-Row Racks
Racks less than or equal to 12 ft (3.7 m) in depth or single-row racks placed back to back having an aggregate depth up to 12 ft (3.7 m), with aisles having an aisle width of at least 3.5 ft (1.1 m) between loads on racks. [13, 2007]
Double-Row Racks
Racks less than or equal to 12 ft (3.7 m) in depth or single-row racks placed back to back having an aggregate depth up to 12 ft (3.7 m), with aisles having an aisle width of at least 3.5 ft (1.1 m) between loads on racks.
Double-Walled Tank
A tank that has an inner and outer wall with an interstitial space (annulus) between the walls and that has a means for monitoring the interstitial space for a leak.
Down Conductor
A conductor from a lightning protection system to earth ground designed to provide a low impedance path for the current from a lightning strike and/or dissipate the charge buildup that precedes a lightning strike. This conductor typically goes from the air terminals to earth. Due to the very high currents at very high frequencies, the impedance of the entire system is very critical. Normal wiring conductors are not suitable for the down conductor. Typically, they are braided conductors. There might be certain instances where additional investigation about the interconnection between the lightning and the grounding electrode system is warranted.
Draft
A pressure difference that causes gases or air to flow through a chimney, vent, flue, or appliance.
Draft
A pressure difference that causes gases or air to flow through a chimney, vent, flue, or fuel-burning equipment. [54, 2006]
Draft
(1) The vertical distance between the water surface and the lowest point of a vessel. (2) The depth of water a vessel needs in order to float.
Draft
The depth of a vessel’s keel below the waterline.
Draft Curtain
A solid material, beam, girder, or similar material or construction that is attached to the underside of the ceiling and that protrudes a
limited distance downward and creates a reservoir for collecting smoke.
Draft Curtain
A solid material, beam, girder, or similar material or construction used to channel or contain smoke that is attached to the underside of the ceiling and protrudes a limited distance downward.
Draft Fan
A mechanical means used with a chimney venting system to augment the natural draft developed in the connected chimney.
Draft Hood
A nonadjustable device built into an appliance, or made a part of the vent connector from an appliance, that is designed to (1) provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood, (2) prevent a backdraft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance.
Draft Hood
A nonadjustable device built into an appliance, or made a part of the vent connector from an appliance, that is designed to (1) provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood, (2) prevent a backdraft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance. [54, 2006]
Drafting
The act of acquiring water for fire pumps from a static water supply by creating a negative pressure on the vacuum side of the fire pump.
Draft Regulator
A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value.
Draft Regulator (Barometric)
A device built into a fuel burning appliance or made a part of a chimney connector or vent connector that functions to maintain draft through an appliance to a desired value by admitting ambient air into the appliance chimney, chimney connector, vent, or vent connector.
Draft Stop
A continuous membrane used to subdivide a concealed space to resist the passage of smoke and heat.
Draft Stop
A continuous membrane used to subdivide a concealed space to resist the passage of smoke and heat. [5000, 2006]
Drag Rescue Device
A component integrated within the protective coat element to aid in the rescue of an incapacitated fire fighter.
Drag Seal
In a chain grate stoker, the hinged plate resting against the returning chain and used to seal the air compartments.
Drag Strip
A straight, open-ended course without turns that generally does not incorporate changes in elevation.
Drain
A pipe that carries waste, water, or liquid-borne wastes in a drainage system.
Drainage System
All piping within or attached to the structure that conveys body or liquid waste to the drain outlet or outlets.
Drain Hose
A hose used for connecting the liquid or body waste drain outlet to a sewer inlet connection.
Drain Outlet
The lowest end of a main or secondary drain to which a sewer connection is made.
Drain Time
The time that it takes for a specified percent (customarily 25 percent) of the total solution that is contained in the foam to revert to liquid and drain out of the bubble structure.
Drain Time
The time that it takes for a specified percent (customarily 25 percent) of the total solution that is contained in the foam to revert to liquid and drain out of the bubble structure. [1150, 2004]
Drain Time (Foam)
The time period it takes for a specified percent of the total solution contained in the foam to revert to liquid and to drain out of the bubble structure.
Drawdown
The vertical difference between the pumping water level and the static water level.
Drift
A time-dependent movement away from an established position.
Drill
An exercise involving a credible simulated emergency that requires personnel to perform emergency response operations for the purpose of evaluating the effectiveness of the training and education programs and the competence of personnel in performing required response duties and functions.
Drill
An exercise involving a credible simulated emergency that requires personnel to perform emergency response operations for the purpose of evaluating the effectiveness of the training and education programs and the competence of personnel in performing required response duties and functions. [600, 2005]
Drill
An exercise involving a credible simulated emergency that requires personnel to perform emergency response operations for the purpose of evaluating the effectiveness of the training and education programs and the competence of personnel in performing required response duties and functions. [601, 2005]
Drip
A flow of liquid that lacks sufficient quantity or pressure to form a continuous stream. [1914, 2002]
Drip
The container placed at a low point in a system of piping to collect condensate and from which it may be removed.
Drip
To run or fall in drops or blobs.
Drip Leg
A chamber of ample volume, with suitable cleanout and drain connections, over which fuel gas is passed so that liquids and solids are trapped.
Dripproof Guarded Motor
A dripproof machine whose ventilating openings are guarded in accordance with the definition for dripproof motor.
Dripproof Motor
An open motor in which the ventilating openings are so constructed that successful operation is not interfered with when drops of liquid or solid particles strike or enter the enclosure at any angle from 0 to
15 degrees downward from the vertical.
Driver’s Enhanced Vision
System (DEVS)
An enhanced vision and navigation system for guiding aircraft rescue and fire-fighting vehicles at night and during certain low-visibility conditions. The DEVS is comprised of three systems: (1) Navigation, which displays the ARFF vehicle’s position on a moving map display mounted in the cab; (2) Tracking, which provides two-way digital communication between the ARFF vehicle and the Emergency Command Center; (3) Vision, which allows the ARFF vehicle operator to see in 0/0 visibility conditions.
Drivetrain
The parts of a fire apparatus that transmit power from the engine to the wheels, including the transmission, split shaft power takeoff, midship pump transmission, drive shaft(s), clutch, differential(s), and axles.
Driveway
A clear space suitable for fire-fighting operations by motorized fire apparatus.
Drop Box
A box containing pendant- or flush-mounted receptacles attached to a multiconductor cable via strain relief or a multipole connector.
Drop Down
The spread of fire by the dropping or falling of burning materials. Synonymous with “fall down.”
Drop-Out Ceiling
A suspended ceiling system, which is installed below the sprinklers, with listed translucent or opaque panels that are heat sensitive and fall from their setting when exposed to heat.
Drug
Any substance, chemical, over-the-counter medication, or prescribed medication that can affect performance.
Drug
Any substance, chemical, over-the-counter medication, or prescribed medication that can affect the performance of the fire fighter.
Drum
For the purposes of this standard, containers built to DOT specification
5P (1A1).
Dry Barrel Hydrant
This is the most common type of hydrant; it has a control valve below the frost line between the footpiece and the barrel. A drain is located at the bottom of the barrel above the control valve seat for proper drainage after operation.
Dry Barrel Hydrant
This is the most common type of hydrant; it has a control valve below the frost line between the footpiece and the barrel. A drain is located at the bottom of the barrel above the control valve seat for proper drainage after operation. [24, 2007]
Dry Barrel Hydrant (Frostproof
Hydrant)
This is the most common type of hydrant; it has a control valve below the frost line between the footpiece and the barrel. A drain is located at the bottom of the barrel above the control valve seat for proper drainage after operation.
Dry Bulk Terminal
A terminal equipped to handle dry goods that are stored in tanks and holds on the vessel.
Dry Chemical
A powder composed of very small particles, usually sodium bicarbonate-, potassium bicarbonate-, or ammonium phosphate-based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities.
Dry Chemical
A powder composed of very small particles, usually sodium bicarbonate-, potassium bicarbonate-, or ammonium phosphate-based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities. [17, 2002]
Dry Chemical Closed Recovery
System
A system that is constructed in a manner that does not introduce foreign material into the agent being recovered and has a means of visually inspecting the recovered agent for contaminants.
Dry Chemical System
A means of applying dry chemical that can be automatically or manually activated to discharge through a distribution system onto or into the protected hazard. The system includes auxiliary equipment.
Drycleaning
The process of removing dirt, grease, paints, and other stains from such items as wearing apparel, textiles, fabrics, and rugs by the use of nonaqueous liquids (solvents, nonwater based).
Drycleaning Machines
Any equipment in which textiles are immersed or agitated in solvent or in which drycleaning solvent is extracted from textiles and/or dried.
Drycleaning Plant
A plant in which drycleaning and associated operations are conducted, including the office, receiving area, and storage rooms. [32, 2007]
Drycleaning Plant
A plant in which drycleaning and associated operations are conducted, including the office, receiving area, and storage rooms.
Drycleaning Room
A room in which the drycleaning operations are conducted, including all additional areas containing solvent or solvent-handling equipment.
Dryer
A piece of processing equipment using temperature or pressure change to reduce the moisture or volatile content of the material being handled.
Dryer
A piece of processing equipment using temperature or pressure change to reduce the moisture or volatile content of the material being handled. [654, 2006]
Dry Floodproofing
A combination of design modifications that results in a building or structure, including the attendant utility and sanitary facilities, being watertight, with walls substantially impermeable to the passage of water, and with structural components having the capacity to resist loads and load combinations associated with the design flood.
Dry Gas
A gas having a moisture and hydrocarbon dew point below any normal temperature to which the gas piping is exposed.
Dry Hydrant
An arrangement of pipe permanently connected to a water source other than a piped, pressurized water supply system that provides a ready means of water supply for fire-fighting purposes and that utilizes the drafting (suction) capability of a fire department pump.
Drying Bed
A confined, underdrained, shallow layer of sand or gravel structures on which digested sludge is distributed for draining and air drying; also an underdrained, shallow, diked earthen structure used for drying sludge.
Drying Tumbler
Any equipment in which solvent-cleaned textiles are tumbled, agitated, and dried or deodorized while heated air circulates through the load to remove the solvent.
Dry Location
A location not normally exposed to moisture such as in the interior of the driving or crew compartment, the interior of a fully enclosed
walk-in fire apparatus body, or a watertight compartment opened only for maintenance operations.
Dry Location
A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction. [70:100]
Dry-Niche Luminaire
A luminaire intended for installation in the wall of a pool or fountain in a niche that is sealed against the entry of pool water.
Dry Nitrocellulose
Nitrocellulose containing less than the minimum wetting agents described in Solvent-Wet Nitrocellulose.
Dry Nondeflagrable Wood
Dust
Wood particulate with a median diameter greater than 420 microns (i.e., material that will not pass through a U.S. No. 40 Standard Sieve), having a moisture content of less than 25 percent (wet basis).
Dry Pipe Sprinkler System
A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the water then flows into the piping system and out the opened sprinkler.
Dry Pipe Sprinkler System
A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the
water then flows into the piping system and out the opened sprinklers.
Dry Pipe Sprinkler System
A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the
water then flows into the piping system and out the opened sprinklers. [13, 2007]
Dry Pipe Sprinkler System
A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the
water then flows into the piping system and out the opened sprinklers. [13:3.4]
Dry Pipe Sprinkler System
A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the water then flows into the piping system and out the opened sprinkler.
Dry Pipe Water Mist System
A water mist system using automatic nozzles attached to a piping system containing air, nitrogen, or inert gas under pressure, the release of which (as from an opening of an automatic nozzle) allows the water pressure to open a dry pipe valve. The water then flows into the piping system and out through any open nozzles.
Dry Powder
Solid materials in powder or granular form designed to extinguish
Class D combustible metal fires by crusting, smothering, or
heat-transferring means.
Dry Powder
Solid materials in powder or granular form designed to extinguish
Class D combustible metal fires by crusting, smothering, or
heat-transferring means. [10, 2007]
Dry Sprinkler
A sprinkler secured in an extension nipple that has a seal at the inlet end to prevent water from entering the nipple until the sprinkler operates.
Dry Sprinkler
A sprinkler secured in an extension nipple that has a seal at the inlet end to prevent water from entering the nipple until the sprinkler operates. [13, 2007]
Dry Stack Storage
A facility, either covered or uncovered, constructed of horizontal and vertical structural members designed to allow placement of small boats in defined slots arranged both horizontally and vertically.
Dry Standpipe
A standpipe system designed to have piping contain water only when the system is being utilized.
Dry Type Spray Booth
A spray booth that is not equipped with a water-washing system to remove overspray from the exhaust airstream and is equipped with one or more of the following: (1) distribution or baffle plates to promote an even flow of air through the booth or to reduce the overspray before it is pulled into the exhaust system; (2) dry media filters, either fixed or on rolls, to remove overspray from the exhaust airstream; (3) powder collection systems that capture powder overspray.
Dry Well
The portion of a pumping station designed to provide isolation and shelter or accommodations for controls or equipment associated with pumping of wastewater and designed to completely and permanently exclude wastewater or wastewater-derived atmospheres.
Dual Control
The use of two primary trunk facilities over separate routes or
different methods to control one communications channel. (SIG-SSS)
Dual-Fuel Burner
A burner designed to burn either fuel gas or oil but not to burn both simultaneously.
Dual-Fuel Truck
A truck that is equipped to be operated using either gasoline or
LP-Gas or to be operated using either gasoline or compressed natural
gas without further modification.
Dual-Phase Processing
A process in which a drycleaning operation precedes or follows a laundering operation in the same equipment.
Duct
An enclosed channel designed expressly for holding and protecting electrical conductors, cables, and busbars.
Duct
Pipes, tubes, or other enclosures used for the purpose of pneumatically conveying materials.
Duct
Pipes, tubes, or other enclosures used for the purpose of pneumatically conveying materials. [91, 2004]
Duct Burner
A burner, mounted in a duct or discharging into a duct, used to heat the air, flue gas, or combustion turbine exhaust gas in the duct.
Duct Burner (HRSG) Purge
A flow of combustion turbine exhaust gas or air at purge rate through the HRSG enclosure for a number of volume changes sufficient to effectively remove any gaseous or suspended combustibles and replace them with the purging medium.
Duct Covering
A material such as adhesive, insulation, banding, coating(s), film, and jackets used to cover the outside surface of a duct, fan casing, or duct plenum.
Duct Furnace
A central furnace designed for installation in a duct of an air distribution system to supply warm air for heating and that depends on a blower not furnished as part of the furnace for air circulation.
Duct Furnace
A central furnace designed for installation in a duct of an air distribution system to supply warm air for heating that depends for air circulation on a blower not furnished as part of the furnace.
Duct Furnace
A furnace normally installed in distribution ducts of air conditioning systems to supply warm air for heating. This definition applies only to an appliance that depends for air circulation on a blower not furnished as part of the furnace.
Duct Lining
A material such as adhesive, insulation, coating(s), and film used to line the inside surface of a duct, fan casing, or duct plenum.
Ducts (or Duct System)
A continuous passageway for the transmission of air and vapors that, in addition to the containment components themselves, might include duct fittings, dampers, plenums, and/or other items or air-handling equipment.
Duct System
A continuous passageway for the transmission of air that, in addition to ducts, includes duct fittings, dampers, fans, and accessory air-managing equipment and appliances.
Duct Termination
The final or intended end-portion of a duct system that is designed and functions to fulfill the obligations of the system in a satisfactory manner.
Due Process
The compliance with the criminal and civil laws and procedures within the jurisdiction where the incident occurred.
Due Process
The compliance with the criminal and civil laws and procedures within the jurisdiction where the incident occurred. [1033, 2003]
Dump Grate Stoker
A stoker equipped with movable ashtrays, or grates, by means of which the ash is discharged at any desirable interval.
Dump Plate
In a stoker-fired furnace, an ash-supporting plate from which ashes can be discharged from one side of the plate by rotation of the plate.
Dump Valve
A device on a power unit to redirect all of the system flow to the reservoir.
Dump Valve
A large opening from the water tank of a mobile water supply apparatus for unloading purposes.
Dump Valve
An automatic valve installed on the discharge side of a positive displacement pump to relieve pressure prior to the pump driver reaching operating speed.
Dunnage
Loose packing material (usually wood) protecting a ship’s cargo from damage or movement during transport.
Duress Alarm Device
An initiating device intended to enable a person at a protected premises to indicate a hostile situation.
Duress Alarm Initiating Device
An initiating device intended to enable a person at protected premises to indicate a hostile situation.
Duress Alarm System
A system that controls duress alarm devices and operates in private or public.
Dust
Any finely divided solid, 420 µm or 0.017 in. or less in diameter (that is, material capable of passing through a U.S. No. 40 Standard Sieve).
Dust Collection Systems
A pneumatic conveying system that is specifically designed to capture dust and wood particulates at the point of generation, usually from multiple sources, and to convey the particulates to a point of consolidation.
Dust Collector
An auxiliary separator that is used to separate the fuel dust from the air or inert gas prior to discharge of the latter from the system.
Dust Collector
Any device designed to separate the conveying gas stream from the solid being conveyed.
Dust Collector
Any device used to separate the material from the air stream, including but not limited to cyclones, filter media-type (baghouse), and enclosureless units.
Dust Explosion Hazard
Areas where dust accumulations exceed 1⁄32 in. (0.8 mm) or areas where dust clouds of a hazardous concentration exist.
Dust-Ignitionproof
Equipment enclosed in a manner that excludes dusts and does not permit arcs, sparks, or heat otherwise generated or liberated inside of the enclosure to cause ignition of exterior accumulations or atmospheric suspensions of a specified dust on or in the vicinity of the enclosure.
Dust-Ignition-Proof Motor
A totally enclosed motor whose enclosure is designed and constructed in a manner that will exclude ignitable amounts of dust or amounts that might affect performance or rating and that will not permit arcs, sparks, or heat otherwise generated or liberated inside of the enclosure to cause ignition of exterior accumulations or atmospheric suspensions of a specific dust on or in the vicinity of the enclosure.
Dusttight
Constructed so that dust will not enter the enclosing case under specified test conditions.
Dusttight
Enclosures constructed so that dust will not enter under specified test conditions.
Dusttight Valve
In a pulverized fuel system, a tight-seating valve installed in the fuel supply pipe to the burner to allow or stop flow.
Dutch Door
A door divided horizontally so that the lower part can be shut while the upper part remains open.
Duty
A fire-related service, function, or task identified in the fire brigade organizational statement and assigned to a member to perform.
Duty
A major subdivision of the work performed by one individual.
Duty, Continuous
Operation at a substantially constant load for an indefinitely long time.
Duty, Intermittent
Operation for alternate intervals of (1) load and no load; or (2) load and rest; or (3) load, no load, and rest.
Duty, Periodic
Intermittent operation in which the load conditions are regularly recurrent.
Duty Rating
The maximum load the ladder is designed to support when it is in use and properly positioned.
Duty Rating
The maximum load the ladder is designed to support when it is in use and properly positioned. [1931:3.3]
Duty, Short-Time
Operation at a substantially constant load for a short and definite, specified time.
Duty, Varying
Operation at loads, and for intervals of time, both of which may be subject to wide variation.
Dvf
A drop diameter such that the cumulative volume, from zero diameter to this respective diameter, is the fraction, f , of the corresponding
sum of the total distribution.
Dwelling
Any building that contains not more than one or two dwelling units intended to be used, rented, leased, let, or hired out to be occupied or that are occupied for habitation purposes.
Dwelling
Any building that contains not more than one or two dwelling units intended to be used, rented, leased, let, or hired out to be occupied or that are occupied for habitation purposes.
[13D, 2007]
Dwelling
One or more living units, each providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation.
Dwelling, Multifamily
A building that contains three or more dwelling units.
Dwelling, Multifamily
A building that contains three or more dwelling units. [70, 2005]
Dwelling, One-Family
A building that consists solely of one dwelling unit.
Dwelling, One-Family
A building that consists solely of one dwelling unit. [70, 2005]
Dwelling, Two-Family
A building that consists solely of two dwelling units.
Dwelling, Two-Family
A building that consists solely of two dwelling units. [70, 2005]
Dwelling Unit
A single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation.
Dwelling Unit
A single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation. [70:100]
Dwelling Unit
One or more rooms arranged for complete, independent housekeeping purposes with space for eating, living, and sleeping; facilities for cooking; and provisions for sanitation.
Dwelling Unit
One or more rooms arranged for complete, independent housekeeping purposes, with space for eating, living, and sleeping; facilities for cooking; and provisions for sanitation. [5000, 2006]
Dwelling Unit
One or more rooms arranged for complete, independent housekeeping purposes, with space for eating, living, and sleeping; facilities for cooking; and provisions for sanitation. [5000, 2009]
Dwelling Unit
One or more rooms arranged for the use of one or more individuals living together, as in a single housekeeping unit normally having cooking, living, sanitary, and sleeping facilities. For purposes of this standard, dwelling unit includes hotel rooms, dormitory rooms, apartments, condominiums, sleeping rooms in nursing homes, and similar living units.
Dwelling Unit
One or more rooms, arranged for the use of one or more individuals living together, as in a single housekeeping unit, that normally have cooking, living, sanitary, and sleeping facilities.
Dwelling Unit
One or more rooms arranged for the use of one or more individuals living together, providing complete, independent living facilities, including permanent provisions for living, sleeping, eating, cooking, and sanitation.
Dwelling Unit
One or more rooms arranged for the use of one or more individuals living together, providing complete, independent living facilities, including permanent provisions for living, sleeping, eating, cooking, and sanitation. [5000, 2006]
Dwelling Unit
One or more rooms arranged for the use of one or more individuals living together, providing complete, independent living facilities, including permanent provisions for sleeping, eating, cooking, and sanitation. [5000, 2006]
Dwelling Unit
One or more rooms for the use of one or more persons as a housekeeping unit with space for eating, living, cooking, and sleeping, and permanent provisions for sanitation.
Dwelling Unit
One or more rooms arranged for the use of one or more individuals living together, providing complete, independent living facilities, including permanent provisions for living, sleeping, eating, cooking, and sanitation. (SIG-HOU)
Dynamic Balance
A physical condition that exists when a vehicle is driven into a turn under high speed and the vehicle displays no tendencies to pitch weight
forward on the front steering wheels nor exhibits of understeer or oversteer conditions which could make the vehicle unstable.
Dynamic Suction Lift
The sum of the vertical lift and the friction and entrance loss caused by the flow through the suction strainers, sea chest, and piping, expressed in feet (meters).
Dynamic System
An HVAC system designed to maintain the movement of air within the system at the indication of a fire.
Dynamic Vehicle Envelope
The space within the tunnel roadway that is allocated for maximum vehicle movement.
Ear Covers
An interface component of the protective helmet element that provides limited protection to the helmet/coat interface area.
Early Suppression
Fast-Response (ESFR)
Sprinkler
A type of fast-response sprinkler that meets the criteria of 3.6.1(a)(1) and is listed for its capability to provide fire suppression of specific high-challenge fire hazards.
Early Suppression
Fast-Response (ESFR)
Sprinkler
A type of fast-response sprinkler that meets the criteria of 3.6.1(a)(1) of NFPA 13, Standard for the Installation of Sprinkler Systems, and is listed for its capability to provide fire suppression of specific high-challenge fire hazards. [13, 2007]
Early Suppression Fast- Response (ESFR) Sprinklers
A type of fast-response sprinkler listed for its capability to provide fire suppression of specific high-challenge fire hazards.
Early Warning
A signal provided by a system that detects fire in its earliest stages of development to enhance the opportunity of building occupants to escape and to commence manual suppression of the fire prior to arrival of fire service units.
Early Warning Fire Detection
(EWFD) Systems
Systems that use smoke, heat, or flame detectors to detect fires before high heat conditions threaten human life or cause significant damage to telecommunications service.
Earth Grounding
The intentional connection to earth through a grounding electrode of sufficiently low impedance to minimize damage to electrical components and prevent an electric shock that can occur from a superimposed voltage from lightning and voltage transients. In addition, earth
grounding helps prevent the buildup of static charges on equipment and material. It also establishes a common voltage reference point to enable the proper performance of sensitive electronic and communications equipment.
Earthing
An IEC term for ground. See 3.3.27, Ground.
Ease
The size requirements and tolerance of garments that allow good fit and do not inhibit the natural body movements or the performance of
job-related tasks.
Easily Accessible
Within comfortable reach, with limited dependence on mechanical devices, extensions, or assistance.
Edge Protection
A means of protecting software components within a rope rescue system from the potentially harmful effects of exposed sharp or abrasive edges.
Edge Protection
A means of protecting software components within a rope rescue system from the potentially harmful effects of exposed sharp or abrasive edges. [1670, 2004]
Education
The process of imparting knowledge or skill through systematic instruction.
Education
The process of imparting knowledge or skill through systematic instruction. It may not require formal classroom instruction. [600, 2005]
Educational Laboratory Unit
A laboratory unit that is used for educational purposes through the twelfth grade by six or more persons for four or more hours per day or more than 12 hours per week.
Educational Methodology
The sum of knowledge and skills, including instructional materials, used by the public fire and life safety educator to create a positive outcome related to the learning objectives.
Educational Occupancy
An occupancy used for educational purposes through the twelfth grade by six or more persons for 4 or more hours per day or more than 12 hours per week.
Educational Occupancy
An occupancy used for educational purposes through the twelfth grade by six or more persons for 4 or more hours per day or more than 12 hours per week. [101, 2006]
Educational Occupancy
An occupancy used for educational purposes through the twelfth grade by six or more persons for 4 or more hours per day or more than 12 hours per week. [5000, 2009]
Educational Occupancy
An occupancy used for educational purposes through the twelfth grade by six or more persons for four or more hours per day or more than 12 hours per week.
Educational Occupancy
An occupancy used for educational purposes through the twelfth grade by six or more persons for 4 or more hours per day or more than 12 hours per week. [101:3.3]
Eductor
A device placed in a hose line or a discharge pipe that incorporates a venturi and proportions foam concentrate or other fire fighting agents into the water stream.
Eductor
A device placed in a hose line or a discharge pipe that incorporates a venturi and proportions foam concentrate or other fire-fighting agents into the water stream. [1901, 2003]
Eductor
A device that uses the Venturi principle to siphon a liquid in a water stream.
Eductor
A device that uses the Venturi principle to siphon a liquid into a water stream. The pressure at the throat is below atmospheric pressure, allowing liquid at atmospheric pressure to flow into the water stream. [1925, 2004]
Eductor (Inductor)
A device that uses the Venturi principle to introduce a proportionate quantity of water additive concentrate into a water stream; the pressure at the throat is below atmospheric pressure and will draw in liquid from atmospheric storage.
Eductor (Inductor)
A device that uses the Venturi principle to introduce a proportionate quantity of foam concentrate into a water stream; the pressure at the throat is below atmospheric pressure and will draw in liquid from atmospheric storage.
Effective Fire Load
The portion of the total fire load under a given, specific fire scenario of a certain fuel package that would be expected to be released in a design fire incident (units: joules or Btu). This can include transit and/or passenger rail vehicle(s), luggage, fuel, and/or wayside facilities or structures, that, because of the fuel package configuration, separation, and combustion characteristics, would be expected to be released in a design fire incident.
Effective Fire Temperatures
Temperatures reached in fires that produce physical effects that can be related to specific temperature ranges.
Effective Ground-Fault
Current Path
An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors on
high-impedance grounded systems.
Effective Ground-Fault
Current Path
An intentionally constructed, permanent, low impedance electrically conductive path designed and intended to carry electric fault current from the point of a ground fault on a wiring system to the electrical supply source.
Effective Grounding Path
The path to ground from circuits, equipment, and metal enclosures for conductors shall (1) be permanent and electrically continuous, (2) have capacity to conduct safely any fault current likely to be imposed on it, and (3) have sufficiently low impedance to limit the voltage to ground and to facilitate the operation of the circuit protection devices. The earth should not be used as the sole equipment-grounding conductor.
Effective Heat of Combustion
The measured heat release divided by the mass loss for a specified time period.
Effective Heat of Combustion
The measured heat release divided by the mass loss for a specified time period. [271, 2004]
Effective Heat of Combustion
(EHC)
The energy generated by chemical reactions per unit mass of fuel vaporized.
Effective Ignition
The time at which a t-squared design fire starts.
Effectively Grounded (as applied to equipment or structures)
Intentionally connected to earth (or some conducting body in place of earth) through a ground connection or connections of sufficiently low impedance and having sufficient current-carrying capacity to prevent the buildup of voltages that might result in undue hazards to connected equipment or to persons.
Effectively Grounded (as applied to systems)
This is defined by ratios of impedance values that must be within prescribed limits.
Effective Masked Threshold
The minimum sound level at which the tone signal is audible in ambient noise. (SIG-NAS)
Effective Operation
The accomplishment of or ability to accomplish the intended task.
Effective Stream
A fire stream that has achieved and sustained the proper flow.
Effect Valve
The last fuel shutoff valve before the flame effect burner.
Egress Side
The side of an opening from which traffic exits.
Ejection Composition
A chemical mixture that, upon burning, produces a burst of gas for deploying recovery devices.
Ejector
An appliance used to fill a fire engine’s tank when the water source is below or beyond the engine’s drafting capability.
Elasticity
The ability of a material to return to its original form after being stretched.
Electrical and Control Space
Electrical and control spaces are those used for the control and management of routine and emergency vessel operations.
Electrical and Electronic
Equipment
Materials, fittings, devices, appliances, and the like that are part of, or in connection with, an electrical installation.
Electrical Clearance
The air distance between the water spray equipment, including piping and nozzles, and unenclosed or uninsulated live electrical
components at other than ground potential.
Electrical Clearance
The unobstructed air distance between extinguishing system equipment, including piping and nozzles, and unenclosed or uninsulated live electrical components not at ground potential.
Electrical Code
The electrical code referenced in Section 2.2.
Electrical Conductivity Heat
Detector
A line-type or spot-type sensing element in which resistance varies as a function of temperature. [72, 2007]
Electrical Conductivity Heat
Detector
A line-type or spot-type sensing element in which resistance varies as a function of temperature. (SIG-IDS)
Electrical Datum Plane
The electrical datum plane is defined as follows: (1) In land areas subject to tidal fluctuation, the electrical datum plane is a horizontal plane 2 ft (610 mm) above the highest tide level for the area occurring under normal circumstances, that is, highest high tide; (2) In land areas not subject to tidal fluctuation, the electrical datum plane is a horizontal plane 2 ft (610 mm) above the highest water level for the area occurring under normal circumstances; (3) The electrical datum plane for floating piers and landing stages that are (1) installed to permit rise and fall response to water level, without lateral movement, and (2) that are so equipped that they can rise to the datum plane established for (a) or (b) is a horizontal plane 30 in. (762 mm) above the water level at the floating pier or landing stage and a minimum of 12 in. (305 mm) above the level of the deck.
Electrical Datum Plane
The electrical datum plane is defined as follows: (a) in land areas subject to tidal fluctuation, the electrical datum plane is a horizontal plane 2 ft (610 mm) above the highest tide level for the area occurring under normal circumstances, that is, highest high tide; (b) in land areas not subject to tidal fluctuation, the electrical datum plane is a horizontal plane 2 ft (610 mm) above the highest water level for the area occurring under normal circumstances; (c) the electrical datum plane for floating piers and landing stages that are (1) installed to permit rise and fall response to water level, without lateral movement, and (2) that are so equipped that they can rise to the datum plane established for (a) or (b) is a horizontal plane 30 in. (762 mm) above the water level at the floating pier or landing stage and a minimum of 12 in. (305 mm) above the level of the deck.
Electrical Ducts
As used in Article 310, electrical ducts shall include any of the electrical conduits recognized in Chapter 3 as suitable for use underground; other raceways round in cross section, listed for underground use, and embedded in earth or concrete.
Electrical Equipment
A general term applied to the material, fittings, devices, fixtures, and apparatus that are part of, or are used in connection with, an electrical installation and includes the electrical power-generating system; substations; distribution systems; utilization equipment; and associated control, protective, and monitoring devices.
Electrical Equipment Space
A space containing electrical propulsion, power generating, or power distribution equipment.
Electrical Firing System
Electrical equipment that provides and/or controls the ignition of pyrotechnics.
Electrical Firing Unit
A device that provides and controls the electric current used to ignite fireworks during a display.
Electrical Hazard
A dangerous condition such that contact or equipment failure can result in electric shock, arc flash burn, thermal burn, or blast.
Electrical Ignition
A technique used to ignite fireworks using a source of electric current.
Electrical Life-Support
Equipment
Electrically powered equipment whose continuous operation is necessary to maintain a patient’s life. [99:3.3.37]
Electrical Life Support
Equipment
Electrically powered equipment whose continuous operation is necessary to maintain a patient’s life. (ELS)
Electrically Connected
A connection capable of carrying current as distinguished from connection through electromagnetic induction.
(Electrically) Instructed
Person
A person adequately advised or supervised by an electrically skilled person to enable him or her to perceive risks and to avoid hazards that electricity can create.
Electrically Operated, Automatic Vent Damper Device
An automatic vent damper device that employs electrical energy to control the device.
Electrically Safe Work
Condition
A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to ensure the absence of voltage, and grounded if determined necessary.
(Electrically) Skilled Person
A person with relevant education and experience to enable him or her to perceive risks and to avoid hazards that electricity can create.
Electrical Metallic Tubing
(EMT)
An unthreaded thinwall raceway of circular cross section designed for the physical protection and routing of conductors and cables and for use as an equipment grounding conductor when installed utilizing appropriate fittings. EMT is generally made of steel (ferrous) with protective coatings or aluminum (nonferrous).
Electrical Nonmetallic Tubing
(ENT)
A nonmetallic, pliable, corrugated raceway of circular cross section with integral or associated couplings, connectors, and fittings for the installation of electrical conductors. ENT is composed of a material that is resistant to moisture and chemical atmospheres and is flame retardant.
Electrical Preventive
Maintenance (EPM)
A managed program of inspecting, testing, analyzing, and servicing electrical systems and equipment with the purpose of maintaining safe operations and production by reducing or eliminating system interruptions and equipment breakdowns.
Electrical Production and
Distribution Network
A power production, distribution, and utilization system, such as a utility system and connected loads, that is external to and not controlled by the photovoltaic power system.
Electrical Raceway Fire Barrier
System (ERFBS)
Nonload-bearing partition-type envelope system installed around electrical components and cabling that have withstood a fire exposure as established in accordance with an approved test procedure and are rated by a test laboratory in hours of fire resistance and are used to maintain specified nuclear safety functions free of fire damage.
Electrical Safety
Recognizing hazards associated with the use of electrical energy and taking precautions so that hazards do not cause injury or death.
[Electrical] Utilization
Equipment
Equipment that utilizes electric energy for electronic, electromechanical, chemical, heating, lighting, or similar purposes. [70, 2005]
Electric Converter
A device used to convert line voltage alternating current to the voltage and frequency, or direct current, suitable for the aircraft power
system.
Electric-Discharge Lighting
Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing.
Electric Hand Lamp
A portable lamp other than a flashlight.
Electric Match
A device containing a small amount of pyrotechnic material that ignites when a specified electric current flows through the device and initiates pyrotechnics.
Electric Match
An electric device that contains a small amount of pyrotechnic material that ignites when current flows through the device.
Electric Match
An electric device that contains a small amount of pyrotechnic material that ignites when current flows through the device. [1123, 2006]
Electric Motor
A motor that is classified according to mechanical protection and methods of cooling.
Electric Power Production and
Distribution Network
Power production, distribution, and utilization equipment and facilities, such as electric utility systems that deliver electric power to the connected loads, that are external to and not controlled by an interactive system.
Electric Sign
A fixed, stationary, or portable self-contained, electrically illuminated utilization equipment with words or symbols designed to convey information or attract attention.
Electric Siren
(Electromechanical)
An audible warning device that produces sound by the use of an electric motor with an attached rotating slotted or perforated disc.
Electric Siren
(Electromechanical)
An audible warning device that produces sound by the use of an electric motor with an attached rotating slotted or perforated disc. [1901, 2003]
Electric Spark
A small, incandescent particle created by some arcs.
Electric Strike
A strike that, when activated, either releases or retains a projected latch or dead bolt.
Electric Switch Type
Thermostat
A device that senses changes in temperature and controls electrically, by means of separate components, the flow of gas to the burner(s) to maintain selected temperatures.
Electric Vaporizer
A vaporizer that uses electricity as a source of heat.
Electric Vaporizer
A vaporizer that uses electricity as a source of heat. [58, 2008]
Electric Vehicle
An automotive-type vehicle for on-road use, such as passenger automobiles, buses, trucks, vans, neighborhood electric vehicles, and the like, primarily powered by an electric motor that draws current from a rechargeable storage battery, fuel cell, photovoltaic array, or other source of electric current. For the purpose of this article, electric motorcycles and similar type vehicles and off-road,
self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included.
Electric Vehicle Connector
A device that, by insertion into an electric vehicle inlet, establishes an electrical connection to the electric vehicle for the purpose of charging and information exchange. This device is part of the electric vehicle coupler.
Electric Vehicle Coupler
A mating electric vehicle inlet and electric vehicle connector set.
Electric Vehicle Inlet
The device on the electric vehicle into which the electric vehicle connector is inserted for charging and information exchange. This device is part of the electric vehicle coupler. For the purposes of this Code, the electric vehicle inlet is considered to be part of the electric vehicle and not part of the electric vehicle supply equipment.
Electric Vehicle Nonvented
Storage Battery
A hermetically sealed battery, comprised of one or more rechargeable electrochemical cells, that has no provision for the release of excessive gas pressure, or for the addition of water or electrolyte, or for external measurements of electrolyte specific gravity.
Electric Vehicle Supply
Equipment
The conductors, including the ungrounded, grounded, and equipment grounding conductors and the electric vehicle connectors, attachment plugs, and all other fittings, devices, power outlets, or apparatus installed specifically for the purpose of delivering energy from the premises wiring to the electric vehicle.
Electrified Truck Parking
Space
A truck parking space that has been provided with an electrical system that allows truck operators to connect their vehicles while stopped and to use off-board power sources in order to operate on-board systems such as air conditioning, heating, and appliances, without any engine idling.
Electrified Truck Parking Space
Wiring Systems
All of the electrical wiring, equipment, and appurtenances related to electrical installations within an electrified truck parking space, including the electrified parking space supply equipment.
Electrode
An electrically conductive connection to a patient. (ELE)
Electroluminescent
Refers to a light-emitting capacitor in which alternating current excites phosphor atoms placed between electrically conductive surfaces and produces light.
Electrolyte
A liquid in which an electric current is easily conducted.
Electrolyte
A solid, liquid, or aqueous salt solution that permits ionic conduction between positive and negative electrodes of a cell.
Electrolyte Density
Density of the electrolyte, measured in kilograms per cubic meter at a specific temperature (density of pure water = 1000 kilograms per cubic meter at 4°Celsius).
Electrolytic Cell
A tank or vat in which electrochemical reactions are caused by applying electric energy for the purpose of refining or producing usable materials.
Electrolytic Cell Line Working
Zone
The space envelope wherein operation or maintenance is normally performed on or in the vicinity of exposed energized surfaces of electrolytic cell lines or their attachments.
Electromagnetic Lock
A door lock that uses an electrically actuated magnetic attraction to secure the door.
Electromechanical
Any device in which electrical energy is used to magnetically cause mechanical movement.
Electronically Actuated Fuse
An overcurrent protective device that generally consists of a control module that provides current sensing, electronically derived time-current characteristics, energy to initiate tripping, and an interrupting module that interrupts current when an overcurrent occurs. Electronically actuated fuses may or may not operate in a current-limiting fashion, depending on the type of control selected.
Electronically Interconnected
Units that must be connected by a signal channel to complete a system or perform an operation.
Electronic Battery Conductance
Tester
A type of battery tester that uses proprietary electronic circuitry to determine the condition, or state of health (SOH), of a vehicle battery and does not apply a resistive load during the test.
Electronic Data Protocol
A process for managing and transmitting electronic data that may include computer based systems; alarm systems; security systems; video; regional, local, site, or building management; and information systems.
Electronic Detonator
A detonator that utilizes stored electrical energy as a means of powering an electronic timing delay element/module and that provides initiation energy for firing the base charge.
Electronic Equipment
That part of electrical equipment containing circuitry mainly based on electronic devices and components.
Electronic Monitoring
A method of electronic communication (data transmission) between an in-place fire extinguisher and an electronic monitoring device/system.
Electronic Premises Security
System
A system or portion of a combination system that consists of components and circuits arranged to monitor or control activity at or access to a protected premises.
Electronic Siren
An audible warning device that produces sound electronically through the use of amplifiers and electromagnetic speakers.
Electronic Siren
An audible warning device that produces sound electronically through the use of amplifiers and electromagnetic speakers. [1901, 2003]
Electronic Stability Control
System
A closed-loop stability-control system that relies on proven antilock brake system and traction control system components. It incorporates sensors for determining vehicle parameters as well as an electronic control unit to modulate braking and traction forces.
Electrostatic Detearing
A process for removing excess wet coating material, such as drips, from the bottom edge of a dipped or coated object or material by passing it through an electrostatic field.
Electrostatic Discharge (ESD) Grounding
The conductive path created to reduce or dissipate the electrostatic charge where it builds up as a result of equipment operation or induced from an electrostatically charged person or material coming in contact with the equipment. Also referred to as static grounding.
Electrostatic Fluidized Bed
A chamber holding powder coating material that is aerated from below to form an air-supported, expanded cloud of the powder. The powder is electrically charged with a charge opposite to that of the object or material being coated.
Element (Accessibility)
An architectural or mechanical component of a building, facility, space, or site.
Elevated Highway
A highway that is constructed on a structure that is above the surface but that does not cross over an obstacle as in the case of a bridge.
Elevated Structure
Any structure not otherwise defined as a surface or underground structure.
Elevated Temperature
An assumed air temperature at the exposed face of the door in excess of ambient temperature.
Elevating Platform
A self-supporting, turntable-mounted device consisting of a
personnel-carrying platform attached to the uppermost boom of a series
of power-operated booms that articulate, telescope, or both and that are
sometimes arranged to provide the continuous egress capabilities of an
aerial ladder.
Elevating Platform
A self-supporting, turntable-mounted device consisting of a
personnel-carrying platform attached to the uppermost boom of a series
of power-operated booms that articulate, telescope, or both and that are
sometimes arranged to provide the continuous egress capabilities of an
aerial ladder. [1901, 2003]
Elevation Cylinder
The hydraulic components consisting of a cylinder barrel, cylinder rod, and related hardware that are used to vary the angle of the ladder or booms.
Elevation Indicator
An instrument on an aerial device that shows the angle of elevation of the aerial ladder or boom.
Elevation Lock
A manual- or positive-locking device (i.e., holding valve) that can be actuated to maintain indefinitely a desired angle or elevation without dependence upon engine power.
Elevator Evacuation System
A system, including a vertical series of elevator lobbies and associated elevator lobby doors, an elevator shaft(s), and a machine room(s), that provides protection from fire effects for elevator passengers, people waiting to use elevators, and elevator equipment so that elevators can be used safely for egress.
Elevator Lobby
A landing from which occupants directly enter an elevator car(s) and into which occupants directly enter upon leaving an elevator car(s).
Elevator Lobby Door
A door between an elevator lobby and another building space other than the elevator shaft.
Eliminate Fuel(s)
Eliminate all fuel.
Eliminate Heat-Energy
Source(s)
Eliminate all places, materials, or objects at which thermal energy can originate or from which thermal energy can be transferred.
Elongation
The increase in length, expressed in a percent of the original gauge length, that occurs in a sample of new rope when tested as specified herein.
Elongation
The percent a section of hose increases in length from an initial measurement with the hose pressurized at 10 psi (6.9 kPa) to a final measurement with the hose pressurized at its proof test pressure.
Elutriation
The selective removal of fine solids from a fluidized bed by entrainment in the upward flowing products of combustion.
Embarkation Area
The area from which a person exits the vessel in an emergency.
Embedded Laser
An enclosed laser with an assigned class number higher than the inherent capability of the laser system in which it is incorporated, where the system’s lower classification is appropriate due to the engineering features limiting accessible emission.
Ember
A particle of solid material that emits radiant energy due either to its temperature or the process of combustion on its surface. (See also 3.3.186, Spark.) (SIG-IDS)
Emblem(s)
Shields, heraldry, or printing that designates a governmental entity or a specific organization; rank, title, position, or other professional status that is painted, screened, embroidered, sewn, glued, bonded, or otherwise attached in a permanent manner.
Emblems
Shields, heraldry, or printing that designates a governmental entity or a specific organization; rank, title, position, or other professional status that is painted, screened, embroidered, sewn, glued, bonded, or otherwise attached in a permanent manner to station/work uniform garments.
Embrittlement
The hardening of a material that makes it susceptible to easy fracture.
Emergency
A condition or situation in which an individual perceives a need for immediate response.
Emergency
A condition that is endangering or is believed to be endangering life or property; an event that requires the urgent response of an emergency response agency.
Emergency
A fire, explosion, or hazardous condition that poses an immediate threat to the safety of life or damage to property.
Emergency
A fire, explosion, or hazardous condition that poses an immediate threat to the safety of life or damage to property. [1, 2006]
Emergency Action Plan
A plan of designated actions by employers, employees, and other building occupants to ensure their safety from fire and other emergencies.
Emergency Action Plan (EAP)
A written plan that defines the emergency response resources, organization, administration, and response procedures for any emergency incident that might occur at or during a motorsports venue/event.
Emergency Alarm System
A system to provide indication and warning of emergency situations involving hazardous materials and summon appropriate aid.
Emergency Alarm System
A system to provide indication and warning of emergency situations involving hazardous materials and to summon appropriate aid.
Emergency Care Attendant
One who has trained to at least advanced first aid and has additional training but is not an EMT.
Emergency Care First
Responder (ECFR)
An individual who has successfully completed the specified emergency care first responder course developed by the U.S. Department of Transportation and who holds an ECFR certification from the authority having jurisdiction.
Emergency Decontamination
The physical process of immediately reducing contamination of individuals in potentially life-threatening situations with or without the formal establishment of a decontamination corridor.
Emergency Dispatch Protocol
A standard sequence of questions used by telecommunicators that provides post-dispatch or pre-arrival instructions to callers.
Emergency Egress
An egress from a compartment or work station in emergencies when the normal egress is unusable.
Emergency Escape Respirators
(EER)
Units used by the general working population to afford effective respiratory protection in escaping from hazardous environments. These units can be either air-purifying or self-contained escape respirators.
Emergency Evacuation Facility
A designated and clear area at rooftop or ground level intended exclusively for emergency/rescue operations by helicopters.
Emergency First Responder
Personnel
Those persons, including members of fire departments, police departments, other law enforcement agencies, hazardous materials response teams, emergency medical services, and other organizations that have public safety responsibilities and who would respond to rescue
and treat victims, and who would protect the public during an emergency incident.
Emergency Fuel Shutoff
A function performed to stop the flow of fuel in an emergency.
Emergency Hand-Crank
Control
An auxiliary or supplemental control with which the operator can manually operate select functions of the aerial device.
Emergency Impairment
A condition where a water-based fire protection system or portion thereof is out of order due to an unexpected occurrence, such as a ruptured pipe, an operated sprinkler, or an interruption of the water supply to the system.
Emergency Impairment
As used in this code, a condition where a fire protection system or portion thereof is out of order due to an unexpected occurrence.
Emergency Incident
Any situation to which an emergency services organization responds to deliver emergency services and other forms of hazard control and mitigation.
Emergency Incident
Any situation to which an emergency services organization responds to deliver emergency services, including rescue, fire suppression, emergency medical care, special operations, law enforcement, and other forms of hazard control and mitigation.
Emergency Incident
Any situation to which an emergency services organization responds to deliver emergency services, including rescue, fire suppression, emergency medical care, special operations, law enforcement, and other forms of hazard control and mitigation. [1561, 2008]
Emergency Incident
Any situation to which the emergency services organization responds to deliver emergency services, including rescue, fire suppression, emergency medical care, special operations, law enforcement, and other forms of hazard control and mitigation. [1561, 2005]
Emergency Incident
Any situation to which the emergency services organization responds to deliver emergency services, including rescue, fire suppression, emergency medical care, special operations, law enforcement, and other forms of hazard control and mitigation. [1561:3.3]
Emergency Management
The act of developing procedures and plans to create effective preparedness, mitigation, response, and recovery during a disaster affecting a health care facility. (HCE)
Emergency Management
Program
A program that implements the mission, vision, and strategic goals and objectives as well as the management framework of the program and organization.
Emergency Medical Care
The provision of treatment to patients, including first aid, cardiopulmonary resuscitation, basic life support (first responder or EMT level), advanced life support (paramedic level), and other medical procedures that occur prior to arrival at a hospital or other health care facility.
Emergency Medical Care
The provision of treatment to patients, including first aid, cardiopulmonary resuscitation, basic life support (First Responder or EMT level), advanced life support (Paramedic level), and other medical procedures that occur prior to arrival at a hospital or other health care facility. [1581:1.3]
Emergency Medical Care
The provision of treatment to patients, including first aid, cardiopulmonary resuscitation, basic life support (first responder or EMT level), advanced life support (paramedic level), and other medical procedures that occur prior to arrival at a hospital or other health care facility. [1581, 2005]
Emergency Medical Care
The treatment of patients, using first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other medical protocols prior to arrival at a hospital or other health care facility.
Emergency Medical [C]BRN Protective Ensemble
An ensemble consisting of garment elements, glove elements,
footwear elements, and a CBRN respirator that is certified to meet the
requirements for protection from specific [C]BRN terrorism agents.
Emergency Medical
Cleaning/Utility Glove
Multipurpose glove, not for emergency patient care, that provides a barrier against body fluids, cleaning fluids, and disinfectants and limited physical protection to the wearer.
Emergency Medical Dispatch
The receipt and management of requests for emergency medical assistance in the emergency medical services (EMS) system.
Emergency Medical
Dispatcher (EMD)
EMS personnel specifically trained and certified in interviewing techniques, pre-arrival instructions, and call prioritization.
Emergency Medical
Examination Glove
An element or item of emergency medical protective ensemble or protective clothing that is designed and configured to provide barrier protection to the wearer’s hand to at least the wrist. (See 3.3.34, Emergency Medical Work Glove.)
Emergency Medical Eye and
Face Protection Device
An item of emergency medical protective clothing that is designed and configured to provide barrier protection to the wearer’s eyes, face, or both eyes and face. ]
Emergency Medical Facemask
An item of emergency medical protective clothing that is designed and configured to provide protection to the wearer’s face including the mucous membrane area of the wearer’s nose and mouth.
Emergency Medical Footwear
An element or item of emergency medical protective ensemble or protective clothing that is designed and configured to provide barrier protection to the wearer’s feet.
Emergency Medical Footwear
Cover
An element or item of emergency medical protective ensemble or protective clothing designed and configured to be worn over standard footwear to provide barrier and physical protection to the wearer’s feet.
Emergency Medical Garment
An element or item of emergency medical protective ensemble or protective clothing designed and configured as a single garment or an assembly of multiple garments to provide barrier protection to the wearer’s upper and lower torso, excluding the hands, face, and feet.
Emergency Medical Helmet
An item of emergency medical protective clothing designed and configured to provide protection to the wearer’s head.
Emergency Medical Operation
Delivery of emergency medical care and transportation prior to arrival at a hospital or other health care facility.
Emergency Medical Operations
Delivery of emergency patient care, including patient transportation, provided prior to arrival at a hospital or other health care facility.
Emergency Medical Operations
Provision of emergency patient care and transportation prior to arrival at a medical care facility by emergency medical responders, emergency patient care by medical first receivers at a medical care facility, and body recovery by emergency medical responders.
Emergency Medical Personnel
Personnel primarily responsible for providing emergency medical care or having additional responsibilities of extrication.
Emergency Medical Protective
Clothing
Items of both single-use and multiple-use protective clothing that provide limited physical protection and barrier protection against body
fluid-borne pathogen contact with the wearer’s body during delivery of emergency patient care and other emergency medical functions. (See
3.3.23, Emergency Medical Cleaning/Utility Glove, 3.3.24, Emergency Medical
Examination Glove, 3.3.25, Emergency Medical Eye and Face Protection Device,
3.3.26, Emergency Medical Facemask, 3.3.27, Emergency Medical Footwear,
3.3.28, Emergency Medical Footwear Cover, 3.3.29, Emergency Medical Garment,
3.3.30, Emergency Medical Helmet, and 3.3.34, Emergency Medical Work Glove.)
Emergency Medical Responders
Emergency services response personnel who perform emergency medical operations prior to arrival at a medical care facility.
Emergency Medical Service
(EMS)
The organization(s) responsible for the care and transport of sick and injured persons to an appropriate emergency care facility. Referred to as Emergency Services in U.S. federal confined space regulations.
Emergency Medical Services
The provision of treatment, such as first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other
pre-hospital procedures including ambulance transportation, to patients.
Emergency Medical Services
The provision of treatment, such as first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other pre-hospital procedures including ambulance transportation, to patients. [1500, 2007]
Emergency Medical Services
(EMS)
Providing patient services that might include the provision of assessment, treatment such as first aid, CPR, BLS, ALS, and other prehospital procedures, including ambulance transportation of patients.
Emergency Medical Services
(EMS)
The provision of treatment, such as first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other prehospital procedures, including ambulance transportation, to patients.
Emergency Medical Services
(EMS)
The provision of treatment, such as first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other pre-hospital procedures, including ambulance transportation, to patients. [1500, 2007]
Emergency Medical Services for Children (EMS-C)
A national initiative to reduce child and youth disability and death from severe illness or injury.
Emergency Medical Services Responders to Hazardous Materials/Weapon of Mass Destruction at the ALS Level (ALS Level Responder)
In addition to their ALS certification, shall be trained to meet at least the core competencies of the operations level responders as defined in
NFPA 472, Standard for Competence of Responders to Hazardous Materials/Weapons of Mass Destruction Incidents, and all competencies of Chapter 5 of this standard.
Emergency Medical Services Responders to Hazardous Materials/Weapon of Mass Destruction at the BLS Level (BLS Level Responder)
In addition to their BLS certification, shall be trained to meet at least the core competencies of the operations level responders as defined in
NFPA 472, Standard for Competence of Responders to Hazardous Materials/Weapons of Mass Destruction Incidents, and all competencies of Chapter 4 of this standard.
Emergency Medical Technician
A person trained and certified to appraise and initiate the administration of emergency care for victims of trauma or acute illness before or during transportation of victims to a health care facility.
Emergency Medical Technician
— Ambulance/Basic
(EMT- A/B)
An individual who has successfully completed an EMT-A or EMT-B curriculum developed by the U.S. Department of Transportation or equivalent, who holds an EMT-A/B certification from the authority having jurisdiction.
Emergency Medical
Technician-Basic (EMT-B)
A prehospital basic life support (BLS) provider with training based on the National Highway Traffic Safety Administration (NHTSA) National Standard Curriculum.
Emergency Medical Technician
(EMT)
A term for any prehospital provider trained and certified at the
EMT-Basic level or higher.
Emergency Medical Technician
— Intermediate (EMT-I)
An individual who has completed a course of instruction that includes selected modules of the U.S. Department of Transportation National Standard EMT — Paramedic curriculum and who holds an intermediate level EMT-I or EMT-C certification from the authority having jurisdiction.
Emergency Medical Technician-Intermediate (EMT-I)
A prehospital provider trained according to the National Highway Traffic Safety Administration (NHTSA) National Standard Curriculum to intermediate levels.
Emergency Medical Technician
— Paramedic (EMT-P)
An individual who has successfully completed a course of instruction that meets or exceeds the requirements of the U.S. Department of Transportation National Standard EMT — Paramedic curriculum and who holds an EMT-P certification from the authority having jurisdiction.
Emergency Medical Technician-Paramedic (EMT-P)
A prehospital provider trained according to National Highway Traffic Safety Administration (NHTSA) National Standard Curriculum to advanced levels.
Emergency Medical Work
Glove
An element or item of emergency medical protective ensemble or protective clothing that is designed and configured to provide physical and barrier protection to the wearer’s hand and wrist. (See also 3.3.24, Emergency Medical Examination Glove.)
Emergency Operations
Activities of the emergency responders relating to rescue, fire suppression, emergency medical care, and special operations.
Emergency Operations
Activities of the fire department relating to rescue, fire suppression, emergency medical care, and special operations, including response to the scene of the incident and all functions performed at the scene.
Emergency Operations
Activities of the fire department relating to rescue, fire suppression, emergency medical care, and special operations, including response to the scene of the incident and all functions performed at the scene. [1500, 2007]
Emergency Operations
Activities of the fire department relating to rescue, fire suppression, emergency medical care, and special operations, including response to the scene of the incident and all functions performed at the scene. [1500:3.3]
Emergency Operations Center
A fixed, designated area to be used in supporting and coordinating operations during emergencies.
Emergency Operations Center
(EOC)
The physical location at which the coordination of information and resources to support incident management (on-scene operations) activities normally takes place.
Emergency Oxygen Supply
Connection
An assembly of equipment which permits a gas supplier to make a temporary connection to supply oxygen to a building which has had its normal source of oxygen disconnected. (PIP)
Emergency Patient Care
Treatment of patients by emergency medical responders or medical first receivers including first aid, cardiopulmonary resuscitation, basic life support, advanced life support, and other medical procedures that occur prior to arrival at a medical care facility, or after arrival at a medical care facility.
Emergency Power Supply
(EPS)
The source of electric power of the required capacity and quality for an emergency power supply system (EPSS).
Emergency Power Supply
(EPS)
The source of electric power of the required capacity and quality for an emergency power supply system (EPSS). [110, 2005]
Emergency Power Supply
System (EPSS)
A complete functioning EPS system coupled to a system of conductors, disconnecting means and overcurrent protective devices, transfer switches, and all control, supervisory, and support devices up to and including the load terminals of the transfer equipment needed for the system to operate as a safe and reliable source of electric power.
Emergency Power Supply
System (EPSS)
A complete functioning EPS system coupled to a system of conductors, disconnecting means and overcurrent protective devices, transfer switches, and all control, supervisory, and support devices up to and including the load terminals of the transfer equipment needed for the system to operate as a safe and reliable source of electric power. [110, 2005]
Emergency Procedures Plan
A plan that is developed by the authority with the cooperation of all participating agencies and that details specific actions required by all those who will respond during an emergency.
Emergency Relief Vent
An opening, construction method, or device that will automatically relieve excessive internal pressure due to an exposure fire.
Emergency Relief Vent