Thiết bị & Hệ thốngCâu 321 / 521
How must emergency illumination be arranged with respect to the failure of a single lighting element?
a.Failure of any individual lighting element shall not leave the area in total darkness
b.A single bulb per room is acceptable
c.Only exit signs are required
d.Battery packs are prohibited
Giải thích
Section 700.16 requires emergency lighting to be designed and installed so that the failure of any individual lighting element, such as a single lamp burning out, cannot leave any space that requires emergency lighting in total darkness. Relying on a single bulb per room would violate this single-failure requirement.
Trích dẫn luật: 2023 NEC §700.16Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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