Branch Circuits & WiringQuestion 148 of 521
Branch-circuit conductors must have an ampacity not less than the maximum load to be served and, before the application of adjustment or correction factors, not less than what portion of the continuous load?
a.125 percent
b.100 percent
c.80 percent
d.150 percent
Explanation
Section 210.19(A) requires branch-circuit conductors to be sized at not less than 125 percent of the continuous load plus 100 percent of the noncontinuous load. This margin accounts for heat buildup under sustained load. 100 and 80 percent are too small; 150 percent is more than the code requires.
Law Reference: 2023 NEC §210.19(A)Practice all 521 questions free — no signup required.
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