Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
What is used to determine conductor size? |
National Electric Code (NEC) |
|
|
Why is gauge size important? |
Helps to determine current carrying capacity in a conductor |
|
|
What is ampacity? |
A conductors current-carrying ability |
|
|
What are 4 factors for determining resistance in a length of wire? |
1. Type of material 2. Diameter of a conductor 3. Length of a conductor 4. Temperature of the conductor |
|
|
What is a mil-foot? |
Determines resistance of different lengths and sizes of wire. 1-foot long and 1 mil in diameter |
|
|
What are 5 conditions for parallel conductors? |
1. Same length 2. Same material 3. Same CMA -- circular mil area 4. Same insulation 5. Same matter of connection/termination |
|
|
What is an eddy current? |
An induced current from the cutting action of an AC magnetic field -- circular currents induced into metals |
|
|
Current continuously changes ________ and _______ in an AC circuit. |
Direction and Magnitude |
|
|
What is a loss in magnetic material caused by molecular friction? |
Hysteresis Loss |
|
|
What 3 colors are grounded conductors not permitted to be? |
1. White 2. Grey 3. Green |
