Dịch vụ & Phân phốiCâu 66 / 521
A feeder overcurrent device protecting a feeder that supplies continuous loads must have a rating not less than:
a.125% of the continuous load plus 100% of the noncontinuous load
b.100% of the total connected load
c.80% of the continuous load
d.150% of the continuous load
Giải thích
Per 215.3, where a feeder supplies continuous load(s), the overcurrent device rating must be at least 125% of the continuous load plus 100% of the noncontinuous load (unless the assembly is listed for 100% operation). The other options misstate the required factor.
Trích dẫn luật: 2023 NEC §215.3Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For a single service, the maximum number of service disconnects permitted for each service permitted by 230.40 is:
- Overload protection for service-entrance conductors must be provided by an overcurrent device in series with:
- A feeder supplies a continuous load of 40 A and a noncontinuous load of 60 A. The minimum feeder conductor ampacity before applying any adjustment factors is:
- A service is supplied with 3/0 AWG copper service-entrance conductors. Using Table 250.66, the minimum size copper grounding electrode conductor is:
- At a grounded AC service, the grounded (neutral) conductor run to the service disconnecting means must be sized:
- The main bonding jumper in service equipment serves to:
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