Is it acceptable to ground outlets or switches through a metal device box (not pig tailing)?
The switches are connected to a long ground wire going to the light which are also screwed to the back of the box. The Ground form the lead (cut short) is screwed to the back of the box as well. My question is if the metal box is an acceptable method for connecting all the ground wires together completing the chain to the earth. The dark green dots in the diagram are screws fastening the ground wires to the box. (This is in Ontario Canada)