Branch Circuits & Feeders第 22 / 120 题
What is the smallest conductor size generally permitted to be installed in parallel?
a.250 kcmil
b.2 AWG
c.4/0 AWG
d.1/0 AWG
解析
Conductors of 1/0 AWG and larger may be run in parallel when the paralleled sets are the same length, material, size and insulation type and terminate in the same manner. Sizes smaller than 1/0, such as 2 AWG, are not permitted to be paralleled except in a few narrow special applications, and 4/0 or 250 kcmil are simply larger than the stated minimum.
法律依据: 2023 NEC §310.10(G)免费刷完整 120 道题库 — 无需注册。
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