Wiring Methods & MaterialsCâu 72 / 120
At what maximum interval must Type AC cable be supported?
a.Every 6 feet
b.Every 4 and 1/2 feet
c.Every 10 feet
d.Every 3 feet
Giải thích
Type AC armored cable is supported at intervals not exceeding 4 and 1/2 feet and secured within 12 inches of each termination. The 6-foot figure is for Type MC cable and 10 feet is for EMT, so mixing the cable types is the usual source of error here.
Trích dẫn luật: 2023 NEC §320.30Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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