Dịch vụ & Phân phốiCâu 13 / 521
What is the function of the main bonding jumper at a service?
a.It connects two ground rods together
b.It connects the grounded (neutral) conductor to the service equipment enclosure
c.It replaces the grounding electrode conductor
d.It bonds the neutral to the water pipe
Giải thích
The main bonding jumper connects the grounded (neutral) conductor to the metal service disconnect enclosure/equipment grounding path at the service, per 250.24 and 250.28. It is not a rod-to-rod connection, does not replace the GEC, and is not the water-pipe bond.
Trích dẫn luật: 2023 NEC §250.28Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- When the grounded (neutral) service conductor is run to the service disconnect, its minimum size is based on which table?
- Ungrounded conductors are increased in size for voltage drop. What must happen to the equipment grounding conductor?
- What is the general rule for the metal water piping system inside a building served by an electrical service?
- Where two rod electrodes are used to meet the supplemental-electrode rule, what is the minimum spacing between them?
- Using the 75 C column of Table 310.16, what is the allowable ampacity of a 3/0 AWG copper conductor?
- What is the 75 C ampacity of a 4/0 AWG copper conductor per Table 310.16?
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