Advanced Wiring第 71 / 110 题
A motor without a marked service factor (or with SF under 1.15) has a full-load current of 28 A. What is the maximum overload protection at 115%?
a.35 A
b.28 A
c.32.2 A
d.30 A
解析
For motors with a service factor less than 1.15, overload protection is limited to 115% of nameplate FLA: 28 x 1.15 = 32.2 A.
法律依据: 2023 NEC 430.32(A)免费刷完整 110 道题库 — 无需注册。
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