Dịch vụ & Phân phốiCâu 60 / 521
A feeder is protected by a 60 A overcurrent device. Per Table 250.122, what is the minimum copper EGC?
a.12 AWG
b.10 AWG
c.8 AWG
d.6 AWG
Giải thích
Table 250.122 requires a 10 AWG copper EGC for overcurrent devices from 40 A up to and including 60 A. 12 AWG serves only up to 20 A, and 8 AWG/6 AWG are for 100 A/200 A respectively.
Trích dẫn luật: 2023 NEC §250.122Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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