Dịch vụ & Phân phốiCâu 58 / 521
Where service-entrance conductors are run in parallel in separate raceways, how is the supply-side bonding jumper sized in each raceway?
a.Sized per Table 250.102(C)(1) based on the largest ungrounded conductor in that raceway
b.One 6 AWG total for the whole service
c.Same as the neutral in all cases
d.Not required for parallel runs
Giải thích
Per 250.102(C)(2), when raceways are in parallel the supply-side bonding jumper in each raceway is sized from Table 250.102(C)(1) using the largest ungrounded conductor in that raceway. A single 6 AWG, matching the neutral, or omitting the jumper are all incorrect.
Trích dẫn luật: 2023 NEC §250.102(C)Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- As a general rule, how many sets of service-entrance conductors may supply each service drop or lateral?
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