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16 Cards in this Set
- Front
- Back
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Electrical Fundamentals:
Ampere |
The unit flow of electrons in a conductor equal to 6.251 x 1018 electrons passing a given section in 1 second |
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Electrical Fundamentals:
Energy |
The product of power and time, also called work
Measured in watt-hours, commonly measured in thousands of watt-hours or kilowatt-hours |
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Electrical Fundamentals:
Impedance |
The resistance in an alternating current (AC) circuit, measured in ohms
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Electrical Fundamentals:
Ohm |
The unit of resistance in an electrical circuit |
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Electrical Fundamentals:
Power factor |
The phase difference between voltage and current in an alternating current circuit
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Electrical Fundamentals:
Reactance |
Part of the electrical resistance in an alternating current circuit, caused by inductance and capacitance
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Electrical Fundamentals:
Volt |
The unit of electromotive force or potential difference that will cause a current of 1 (A) to flow through a conductor whose resistance is 1 (Ω)
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Electrical Fundamentals:
Watt |
The unit of electrical power
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Basic Relationships:
Electricity |
The energy caused by the flow of electrons
See figure 32.1; pg 32-1 |
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Basic Relationships:
Ohm's Law |
Relates current, voltage, and resistance in direct current (DC) Formula: (I = V/R) Similar for alternating current (AC) Formula: (I=V/Z) |
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Basic Relationships: Series circuit |
A basic type of electric circuit
The loads are placed in the circuit one after another (usually represented in diagrams by zig-zag lines) See figure 32.3 (a) |
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Basic Relationships: Parallel circuit |
A basic type of electric circuit
The loads are placed between the same two points Voltage remains the same, but current is different across each load See figure 32.3 (b) |
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Materials:
Cable
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Conductors that are no.6 AWG or larger or several conductors assembled into a single unit
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Materials:
Wire |
Conductors no. 8 AWG or smaller
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Materials:
Conductors |
Two basic types - Aluminum and copper
Aluminum conductors must be larger than copper to carry the same amperage; aluminum is lighter and lower installation cost |
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Materials:
Insulators |
Common cables
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