When Type AC cable is run across the top of a floor joist in an attic without permanent ladders or stairs, substantial guard strips within _____ of the scuttle hole, or attic entrance, shall protect the cable. a) 3 ft b) 4 ft c) 5 ft d) 6 ft See answer and applicable Code reference The correct answer is: d) 6 ft Article 320 covers the use, installation, and construction specifications for armored cable, Type AC. As noted in 320.23(A), "Where run across the top of floor joists, or ...

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