Mạch nhánh & Đi dâyCâu 138 / 521
Between pull points (for example, from box to box), the total number of bends in one run of EMT must not exceed the equivalent of how many degrees?
a.180
b.270
c.360
d.450
Giải thích
Section 358.26 limits the total bends between pull points to the equivalent of four quarter bends, or 360 degrees. Exceeding this makes conductor pulling difficult and risks insulation damage. 180 and 270 are below the allowed total; 450 exceeds the code maximum.
Trích dẫn luật: 2023 NEC §358.26Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is the minimum height (headroom) of the working space about electrical equipment such as panelboards, generally required by 110.26?
- Electrical metallic tubing (EMT) must be securely fastened within what distance of each outlet box, junction box, or fitting?
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- Along its length, liquidtight flexible metal conduit (LFMC) must be supported at intervals not exceeding what distance?
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