A new industrial facility requires a 480V, 3-phase, 4-wire power distribution system. The conductor run is 100 feet. What is the minimum size of the conductor required for a 100A circuit?
- A3/0 AWG
- B4/0 AWG
- 250 kcmil
- D300 kcmil
Exam tip
Use Table 310.15(B)(16) to determine the minimum conductor size for a given current and run length.
Why C is correct
According to 310.15(B)(16), for a 100A circuit, the minimum conductor size is 250 kcmil for a 100-foot run.