Box Fill Calculator
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Conductors excluding ground, internal clamps are tabs that hold wires.
https://www.omnicalculator.com/construction/box-fill
- Results - 14 ga 3 2-conductor wires 1 device - 20 cu in
- 12 ga 3 wires 1 device - 22.5 cu in
- 12 ga outlet - 2 2-conductor wires 1 device - 18 cu in
- 14 ga outlet - 2 2-conductor wires 1 device - 16 cu in