Services & DistributionCâu 40 / 110
Absent a specific exception, what is the maximum overcurrent protection for a #12 Cu conductor?
a.30 A
b.25 A
c.15 A
d.20 A
Giải thích
Under the small-conductor rule, #12 Cu is limited to a maximum overcurrent device of 20 A.
Trích dẫn luật: 2023 NEC 240.4(D)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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