Is there a standard on dimensions of a duplex receptacle on a single yoke? We are looking to manufacture an additional circuit to be added to the back of a standard 5-15 outlet which would give us wireless control over it. According to the NEC and NEMA the receptacle counts as 2 conductors multiplied by the volumetric allowance for the largest wire in the box. I need to know how much volume the receptacle can take up to maintain compliance. For example in a 18in3 electrical box with 2 14/3 wires how large an area may the receptacle (mounted on a single yoke) use. Is this regulated?
Thanks in advance,
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