Older detached garage with 3 wire feed and wired like a regular panel (grounds/neutrals bonded/connected). There was a abandoned copper water line that was fed from the house. Question: I know this water line is a metallic path, but this is what’s confusing me (copied from an old thread):
There are no continuous metallic paths bonded to the
grounding system in each building or structure involved.
I’m assuming the water line would need to be bonded to the grounding system in order for this to require a 4-wire feed and ground/neutral separation, no? So the presence of the water line doesn’t mean anything, in the case, since it’s not bonded to the grounding system? Generally speaking, I don’t think I’ve ever seen anything bonded to the grounding system at a detached garage/structure (e.g. water, phone, cable, etc).