Set 1

Front 1

Dew Point

Back 1

the temperature to which a sample of air must be cooled for the air to be saturated

• condensation happens when dew point temp = air temp
• Dew point close to air temp - high RH
• Dew point temp lowers - RH drops
• Dew point temp always lower than air temp

Front 2

Humidity

Back 2

measure of how much water is in a sample of air

Front 3

Relative Humidity

Back 3

how much humidity is in the air compared to how much can be

• represented as a %

Front 4

Copper Cable Types

Back 4

• CAT5

• CAT5e

• CAT6

Front 5

CAT5 Copper Cable

Back 5

• 10/100 Mbps
• 100 MHz bandwidth

Front 6

CAT5e

Back 6

CAT5 enchanced

• 1 Gbps
• reduces cross talk (interference)

Front 7

CAT6

Back 7

• 10 Gbps
• 250 Mhz
• internal separator that isolates wires from each other

Front 8

UTP vs STP

Back 8

• shield composed of 'foil' to cut down on noise, or copper-braid for industrial environment

Front 9

Fiber Cable Components

Back 9

1. Core
2. Cladding
3. Buffer
4. Jacket

Front 10

How fiber optic cable works

Back 10

1. light is emitted as pulse at source through glass hair (core)
2. light travels through core bouncing off cladding, allowing it to travel "endlessly"
3. Receiver receives the light pulses and coverts to data

Front 11

Advantages to Fiber Cabling

Back 11

• not prone to noise
• travel over longer distances than cable

Front 12

Fiber Cable Naming Convention

Back 12

ex: 62.5/125 m and 50/125 m (multi-mode)

ex: 8.3/150 m (single mode)

1. first number - the diameter of the core
2. second number - size of the cladding

#'s are in millionth of a meter

Front 13

Types of Fiber Cables

Back 13

1. Single mode
2. multi mode

Front 14

Single Mode Fiber

Back 14

• laser light source
• longer distances than LED

Front 15

Multi Mode Fiber

Back 15

• LED light source
• medium distance (up to 300m)
• more expensive than single mode, but equipment it works with is cheaper

Front 16

Storage Area Network (SAN)

Back 16

• allows for fast, flexible and redundant network wide data storage
• requires large amount of network connections

Front 17

Types of Building to Building Network Connectivity

Back 17

• Telecommunication provider

- expensive, re-occuring costs

• Hardwire

- one time fee, time consuming

• Canopy

- cover long distances

• FSO (Free Space Optics)

- uses lasers, highly secure, long distance

Front 18

Network Installation Best Practices

Back 18

1. Ensure all building codes are followed
2. Use professional contractors
3. Bundle cables in modest bundles (12)
4. Ensure generous bend radius
5. Keep STP and UTP cables away from power devices/cables
6. Get 3rd party to conduct network testing
7. ensure all holes are filled
8. use color coding
9. label cables, patch to patch, etc

Front 19

Test and Verify Structured Cabling

Back 19

• NEXT
• PS-NEXT
• ELFEXT
• PS-ELFEXT
• Return Loss
• Propagation delay
• delay skew

Front 20

Test and Verify Fiber

Back 20

return loss / insertion loss

Front 21

Fire Sources in a DC

Back 21

- most fires originate from electrical sources

• equipment
• electrical distribution
• light fixtures
• bad connections, overloading, dust

Front 22

Fire Suppression Requirements

Back 22

1. detect as early as possible
2. suppression should be safe for humans
3. environmentally friendly
4. don't (or minimize) damage equipment
5. comply w/ all codes

Front 23

Fire Suppression Standards

Back 23

• NFPA 75
• NFPA 2001 / ISO 14520
• local codes

Front 24

Fire Suppression Standards state ""

Back 24

• safety measures
• gas/flooding systems available
• cardio-toxicity and allowable exposure levels

Front 25

Cardio-toxicity and Allowable Exposure levels

Back 25

• highest concentration w/ no effect to human
• lowest concentration w/ effect to human

Front 26

Fire Detection Systems

Back 26

• VESDA - Very Early Smoke Detection Apperatus
• HSSD - Highly Sensitive Smoke Detection
• Smoke detectors for fire panels
• Sprinklers
• Concealed sprinkler systems

Front 27

Types of Smoke Detectors for Fire Panels

Back 27

Ionization detectors

- uses radiation to analyze air sample for smoke

- more sensitive than photoelectric

Photoelectric detector

- uses light

- deflection of light sets alarm

Front 28

Fire Suppression Systems

Back 28

1. Wet/Dry Sprinkler System
2. Halon 1301
3. Carbon Dioxide (CO2)
4. FM200
5. Inergen
6. Argonite
7. Novec
8. FE13

Front 29

Halon 1301

Back 29

- fire suppression method

- gas form

- decommissioned method

- harmful to environment

Front 30

Carbon Dioxide (CO2)

Back 30

- fire suppression method

- gas

- cheap

- harmful to humans, not environment

Front 31

FM200

Back 31

- fire suppression method

- low pressure gas

- needs to be close to room (20-40m)

- harmful to environment, not humans

Front 32

Inergen

Back 32

- fire suppression method

- high pressure, requires pressure values

- large storage tanks

- can be stored far away

- not harmful to humans or environment

Front 33

Argonite

Back 33

- fire suppression method

- gas system

- not harmful to humans or environment

Front 34

Novec

Back 34

- fire suppression method

- gas

- environmentally friendly

Front 35

FE13

Back 35

- fire suppression method

- gas

- can be used in rooms with higher ceilings

Front 36

Best Practices for Fire Suppression

Back 36

1. install smoke detectors
2. use gas as primary
3. water as secondary
4. room properly sealed
5. ensure there is enough gas for space
6. create extraction vents
7. regular maintenance on the system

Front 37

Types of Fire Extinguishers

Back 37

1. Class A
2. Class B
3. Class C
4. Class D
5. Class K

Front 38

Class A Fire Extinguisher

Back 38

- involving wood, cloth, paper, plastic

- uses pressurized water or water based agent

Front 39

Class B Fire Extinguisher

Back 39

- involving combustible/flamible liquids

- uses CO2 or dry chemical agent

Front 40

Class C Fire Extinguisher

Back 40

- main data center concern

- involving electrical equipment

- uses CO2, Halon, dry chemical agent

Front 41

Class D Fire Extinguisher

Back 41

- involves combustable metals

- uses dry power agent

Front 42

Class K Fire Extinguisher

Back 42

- involves cooking fats, oils

- uses liquid chemical

Front 43

Safety Regulation Requirements

Back 43

• Emergency Power Off (EPO) switch
• Auto Unlock doors
• escape routes
• automatic shutdown of air conditioners
• integration w/ existing building fire panels
• gas release and abort buttons
• check local fire code

Front 44

EMS

Back 44

environmental monitoring system

- only monitoring functions

- low level monitoring

- in-expensive solution

Front 45

BMS

Back 45

building management system

- monitoring and controlling functions

- high level monitoring

- expensive solution

Front 46

Types of Water Detection

Back 46

pads

- cheap

- only cover a small area

cable

- placed under raised floor

- covers large loop

Front 47

Current

Back 47

flow of electric charge

Front 48

Voltage

Back 48

force of electrical charge flow

Front 49

Water Hose Electricity Analogy

Back 49

water flowing through hose = electrons in a wire

amount of water going through hose = current

pressure used to push the water = voltage

Front 50

Types of Electricity

Back 50

alternating current (AC)

direct current (DC)

Front 51

Alternating Current (AC)

Back 51

- completes a cycle 60x second

- 1 cycle = 1 hertz

- hertz = Hz

Front 52

Static Transfer Switch vs Automatic Transfer Switch

Back 52

* both utilize "break before make" principle

STS

- semiconductor technology

- faster switching (4 milliseconds)

- complex, small MTBF

- large switching capacity

ATS

- electromechanical technology

- slow switching (8-16 milliseconds)

- simple design, large MTBF

- small switching capacity

Front 53

Power Cables vs Busbar

Back 53

Cabling

- less flexible

- fixed power rating

- inexpensive

Busbar

- flexible in phase or power rating

- expensive

Front 54

Types of Cable Distribution

Back 54

Trunking

- PDU to racks

Trays

- used in switch rooms

Ladders

- run cables between floors

Baskets

- used for networking

Front 55

Grounding

Back 55

• establish voltage reference
• clear electrical faults
• provide a discharge path (SRG)
• DC should have its own ground

*ground resistance should be less than 1 ohm not to exceed 5 ohm

Front 56

Isolation Transformers

Back 56

- a way to rebond a device closer to the power load

- based o a Delta-Wye configuration

- Delta is primary, Wye is secondary

- Delta and Wye separated by a magnet

- output can only travel max 75ft