Thiết bị & Hệ thốngCâu 332 / 521
How must fire alarm circuit cables be installed and supported?
a.Left unsupported above ceilings
b.Run only in EMT
c.Installed in a neat and workmanlike manner and supported so the cable will not be damaged by normal building use
d.Bundled together with power conductors
Giải thích
Section 760.24 requires fire alarm cables to be installed in a neat and workmanlike manner, adequately supported by the building structure, and protected from physical damage. Leaving cable unsupported above a ceiling or bundling it with power conductors is not permitted; conduit is not the only allowed method.
Trích dẫn luật: 2023 NEC §760.24Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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