They did put 1 1/2 copper back in to replace the main and extended it 3' above the floor then they replaced the overhead copper with pvc then tied back to the existing copper. I was able to tie back to the main water line that was replaced, now they had 3/0 copper run as the GEC to a buss bar and made taps off of that to a SDS and the main. Off of that tap I need to ground the water pipe that was isolated by the pvc and a copper air compressor line, what size wire is needed.
