The BES Series of non-metallic box extenders adds 5/8 in. of height and 5.3 cu in. to 10.5 cu in. of volume to an existing electrical box The BES Series of non-metallic box extenders adds 5/8 in. of ...
Wires aren't the only components you need to worry about when calculating box fill. You also need to consider the volume of any conductors, clamps, support fittings, devices, equipment, and grounding ...
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