Services, Grounding & BondingCâu 34 / 120
Where the grounding electrode conductor connects only to a concrete-encased electrode, what is the largest size it is required to be?
a.2 AWG copper
b.6 AWG copper
c.4 AWG copper
d.1/0 AWG copper
Giải thích
The conductor to a concrete-encased electrode is never required to be larger than 4 AWG copper. The 6 AWG cap belongs to rod, pipe and plate electrodes, and 2 AWG or 1/0 would only come from Table 250.66 before this limiting rule is applied.
Trích dẫn luật: 2023 NEC §250.66(B)Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A service uses 3/0 AWG copper ungrounded service-entrance conductors. What is the minimum size copper grounding electrode conductor?
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- A 200-ampere feeder requires what minimum size copper equipment grounding conductor?
- What is the minimum size copper equipment grounding conductor for a 400-ampere feeder?
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