Advanced WiringCâu 66 / 110
A hermetic compressor has a rated-load current of 24 A. What is the maximum branch-circuit short-circuit and ground-fault device at 175% (next standard size)?
a.40 A
b.45 A
c.50 A
d.60 A
Giải thích
175% of 24 A = 42 A; the next standard overcurrent size is 45 A, which is the maximum permitted for short-circuit/ground-fault protection.
Trích dẫn luật: 2023 NEC 440.22(A)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A wet-niche underwater luminaire operating without GFCI protection is limited to a maximum of:
- A motor disconnecting means must have an ampere rating of at least what percent of the motor full-load current?
- A single hermetic refrigerant motor-compressor has a rated-load current of 24 A. What minimum branch-circuit conductor ampacity is required?
- Which nameplate value on an air-conditioning unit is used to size the branch-circuit conductors?
- A Class 2 power-limited circuit at 30 V or less is limited to a maximum power of:
- Cables listed for power-limited fire alarm use are marked with which type designation?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Master Electrician Licensing Exam (NEC-based) · Quy trình kiểm tra