Conduit Phil
Member
Why does a 1-1/4" 4" square box have a cubic inch capacity of 18? 1.25*4*4=20. Where did the extra 2 cubic inches go? A 2-1/8" box is 30.3 vs 34, etc...
Also, why doesn't a raised ground screw bump take up any room in a box fill calculation?
Also, why doesn't a raised ground screw bump take up any room in a box fill calculation?