1) Do switches need to be grounded to the box? If so, can I just run a piece of copper from the switch to the ground screw on the box. If so, I have to double up on the ground screw. Is this a problem?
2) With receptacles, a few of them have large looms of ground wires and rather than undoing it and adding a pigtail to ground to the receptacle, can I just run a ground wire directly from the receptacle to the ground screw on the box. Again I have to double it up around the screw. Is this a problem?
3) Lastly, can I double up switch legs on a lug on a switch if I want to tie a couple of banks of lights with separate switch legs together for example.