Mạch nhánh & Đi dâyCâu 192 / 521
Per Chapter 9, Table 1, what is the maximum permitted fill percentage when only one conductor is installed in a conduit?
a.31%
b.40%
c.60%
d.53%
Giải thích
A single conductor may fill up to 53% of the conduit's internal area per Table 1. 31% is for two conductors, 40% for three or more, and 60% is not a code value.
Trích dẫn luật: 2023 NEC Chapter 9, Table 1Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- How are conductors that both originate and terminate within the box (such as short pigtails or jumpers) treated in a box-fill calculation?
- Per Chapter 9, Table 1, what is the maximum permitted conduit fill percentage when three or more conductors are installed in a raceway?
- Per Chapter 9, Table 1, what is the maximum permitted fill percentage when exactly two conductors are installed in a conduit?
- Per Annex C, Table C.1, what is the maximum number of 12 AWG THHN conductors permitted in 1/2" EMT?
- Per Annex C, Table C.1, what is the maximum number of 14 AWG THHN conductors permitted in 1/2" EMT?
- Per Annex C, Table C.1, what is the maximum number of 12 AWG THHN conductors permitted in 3/4" EMT?
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