Equipment & SystemsQuestion 270 of 521
For the 3 HP, 115 V single-phase motor (FLC 34 A), what minimum branch-circuit conductor ampacity does NEC 430.22 require?
a.34 A
b.42.5 A
c.38.25 A
d.46.75 A
Explanation
NEC 430.22 requires 125% of FLC for a single continuous-duty motor: 34 x 1.25 = 42.5 A. 34 A omits the factor, 38.25 A uses 112.5%, and 46.75 A uses 137.5%.
Law Reference: 2023 NEC §430.22Practice all 521 questions free — no signup required.
Related questions on this topic
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