Thiết bị & Hệ thốngCâu 308 / 521
The ampacity of conductors from a generator terminal to the first overcurrent device must be at least what percent of the generator nameplate current rating?
a.100%
b.110%
c.115%
d.125%
Giải thích
Section 445.13(A) requires the conductors from generator terminals to the first distribution device to have an ampacity of not less than 115 percent of the nameplate current rating. This margin covers the generator's ability to deliver current above its continuous rating; 100 or 110 percent would be insufficient.
Trích dẫn luật: 2023 NEC §445.13Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A legally required standby system must restore power to its loads within what maximum time after normal supply is lost?
- How is the maximum current of a PV source circuit determined for conductor and overcurrent sizing?
- Rapid shutdown requires that controlled conductors more than 1 foot outside the array boundary be limited to what within 30 seconds?
- In a clothes closet, a surface-mounted incandescent or LED luminaire with a completely enclosed light source must maintain what minimum clearance to the nearest storage space?
- In a clothes closet, a recessed incandescent or LED luminaire with a completely enclosed light source must maintain what minimum clearance to the nearest storage space?
- Under the 2023 NEC, what unit load is used to calculate the general lighting load for a dwelling unit?
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