Dịch vụ & Phân phốiCâu 90 / 521
Ground-fault protection of equipment is generally required for solidly grounded wye services of more than 150 V to ground but not exceeding 1000 V phase-to-phase, where the service disconnect is rated:
a.1000 A or more
b.400 A or more
c.100 A or more
d.2000 A or more
Giải thích
Per 230.95, ground-fault protection of equipment is required on such services where the service disconnecting means is rated 1000 A or more. The other ampere thresholds do not match the code trigger for this GFP requirement.
Trích dẫn luật: 2023 NEC §230.95Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A feeder supplies a single continuous load of 100 A. The minimum feeder conductor ampacity and overcurrent device rating is:
- A supply-side bonding jumper on the line side of the service, used to bond service raceways and enclosures, is generally sized based on:
- Metal water piping system(s) in or attached to a building must be:
- In a typical utility service arrangement, the electric meter (metering equipment) is normally connected:
- A feeder is the main power feeder to a single dwelling and carries the entire load. What allowance does the dwelling feeder provision give for sizing this conductor?
- As a general rule, each service drop or service lateral is permitted to supply:
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-10 Electrical Trade Examination · Quy trình kiểm tra