Dịch vụ & Phân phốiCâu 24 / 521
Using the 60 C column of Table 310.16, what is the ampacity of a 6 AWG copper conductor?
a.65 A
b.55 A
c.75 A
d.50 A
Giải thích
Table 310.16 lists 55 A for 6 AWG copper at 60 C. 65 A is the 75 C value, 75 A is the 90 C value, and 50 A is 8 AWG copper at 75 C.
Trích dẫn luật: 2023 NEC §310.16Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For equipment terminals on a circuit rated 100 A or less (not marked otherwise), which temperature column must be used to size conductors?
- A feeder supplies a continuous load of 176 A. What minimum conductor ampacity (before derating) is required?
- Six 3 AWG THHN copper conductors (90 C ampacity 110 A) are in one raceway at 30 C ambient. After the fill adjustment, what is the derated ampacity?
- What is the maximum overcurrent protection allowed for a 12 AWG copper conductor under the small-conductor rule?
- Which of the following is NOT a standard ampere rating for a fuse or inverse-time breaker per 240.6(A)?
- A conductor has an allowable ampacity of 115 A that does not match a standard fuse size. The load is 112 A. What is the largest standard OCPD permitted?
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