Mạch nhánh & Đi dâyCâu 150 / 521
On a 20-ampere branch circuit supplying two or more receptacles, a single cord-and-plug-connected utilization equipment item must not have a rating exceeding what value?
a.10 A
b.12 A
c.16 A
d.20 A
Giải thích
Section 210.23(A)(1) limits any single cord-and-plug-connected utilization equipment to 80 percent of the branch-circuit rating where the circuit supplies two or more outlets. On a 20-A circuit that is 16 A. 10 and 12 A are stricter than required; 20 A would leave no margin and exceeds the 80-percent limit.
Trích dẫn luật: 2023 NEC §210.23(A)(1)Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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