Services, Grounding & BondingCâu 36 / 120
A 200-ampere feeder requires what minimum size copper equipment grounding conductor?
a.3 AWG
b.8 AWG
c.4 AWG
d.6 AWG
Giải thích
The 200-ampere row of Table 250.122 specifies 6 AWG copper. 8 AWG belongs to 100 amperes, 4 AWG to 300 amperes and 3 AWG to 400 amperes, so those choices come from reading adjacent rows.
Trích dẫn luật: 2023 NEC Table 250.122Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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