Jeff Remas Posted December 23, 2008 Report Share Posted December 23, 2008 *This is a box fill calculation question only and nothing else* While inspecting the unfinished basement for a client you come across a 4" square x 1-1/2" metal box that is fed with one 14/4 NM cable and one 12/2 NM cable. The box has one duplex receptacle and one single pole switch. As you are noting the missing cover for your report you look inside and easily see that the equipment grounds are attached to the box with a ground screw and properly attached to the devices. The NM cables are secured with a single cable clamp. The client states "There sure are a lot of wires in there." and this gets you wondering if the box fill is compliant with the NEC. Is it? Quote Link to comment Share on other sites More sharing options...
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