Multiple Choice
To meet the requirements of NEC 110.9 and 110.10, it is absolutely necessary to determine the available fault currents at various points on the electrical system.If a study is not done, the selection of overcurrent devices may be in error, resulting in a hazard to life and property.
A) short-circuit
B) transformer multiplier
C) line-to-line voltage
D) line-to-line wattage
Correct Answer:

Verified
Correct Answer:
Verified
Q1: What is the intent of NEC 110.9
Q4: The amount of short-circuit current from a
Q5: When determining the f factor, X represents
Q6: A situation known as _ occurs when
Q8: The NEC includes a requirement that the
Q9: What should you keep in mind when
Q10: What is the approximate line-to-ground arcing fault
Q11: What is the importance of selective coordination?
Q16: The actual impedance value on a UL-listed
Q17: To obtain the approximate short-circuit current values