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

Question

Quizplus · Accepted Answer

The available fault current refers to the maximum amount of current that could flow through a short circuit in the electrical system. This information is necessary for selecting appropriate overcurrent protection devices. Therefore, option A (short-circuit) is the best choice to determine available fault currents. The other options, transformer multiplier, line-to-line voltage, and line-to-line wattage, are not relevant for calculating available fault currents.

To Meet the Requirements of NEC 110