Advanced Wiring第 66 / 110 题
A hermetic compressor has a rated-load current of 24 A. What is the maximum branch-circuit short-circuit and ground-fault device at 175% (next standard size)?
a.40 A
b.45 A
c.50 A
d.60 A
解析
175% of 24 A = 42 A; the next standard overcurrent size is 45 A, which is the maximum permitted for short-circuit/ground-fault protection.
法律依据: 2023 NEC 440.22(A)免费刷完整 110 道题库 — 无需注册。
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