Hi, I'm Mike and I'll be glad to assist you. Neutrals and grounds are always connected in the main service equipment. For a 100A service, today's code, requires that a #6 copper be ran from the panel to the street side of the water service and a bonding jumper placed across the water meter. This make the grounding not dependent on the plumbing. If there is a ground wire attached to the individual outlet boxes and it is continuous to the panel, the system outlets are grounded and all that is necessary is to install a jumper from the box to the device. If there is no ground continuous to the panel and a GFCI is installed to provide protection of a grounded outlet, then the ground wires are not connected after the GFCI. Ground from outlets should not be attached to the plumbing. They may be attached to the #6 grounding electrode conductor.
Hi Mike- Thanks so much for your answer and I apologize for my delay. I'm still not sure I understand what the proper way is to leave a ground wire disconnected in a metal box in the instance of "If there is no ground continuous to the panel and a GFCI is installed to provide protection of a grounded outlet, then the ground wires are not connected after the GFCI". I know it may seem like a silly question, but I just don't understand what the proper way is to cover it up since it would be so easy for the bare grounding wire to touch the metal box. Do I fold it and tape it? Cut it off as far back as possible and tape it? If you could clarify that for me I'd really appreciate it. Thanks! Russell
I must not be making my question clear enough, Mike.
Let's say you have a circuit that goes from the panel to a metal gang box with a neutral and hot and no ground. But let's say the next leg of the circuit was wired later with newer romex that included a bare copper grounding wire that is wrapped around a screw inside this metal box. I go to install a GFCI in this box. The line side has no grounding wire, but the downstream load side does have a grounding wire. I understand that in this case I do not want to attach this grounding wire to the GFCI, but what do I physically do with this grounding wire that is attached to the metal box??? Like I asked, do I fold it and tape it or cut it back as far as possible or what? I can't get fully rid of it without cutting open the wall and yanking it out of the box.
So what is the proper way to isolate this grounding wire from the metal box and the GFCI? Thank you