Introduction
My house initially had many outlets grounded to the copper plumbing using ground pipe clamps like this one which I know are no longer allowed via code:
I have gone through and replaced my copper lines with PEX for finishing a basement. In the process I had an electrician install a new breaker box. The breaker box itself has a copper line that runs from it to my water supply source (copper line).
Questions
To avoid having to run new 14/3 wire for all outlets, is it acceptable to attach my outlet grounds to the circuit breaker ground wire using a split bolt connector like the one shown below? If it is acceptable, is there any guideline to how many per terminal are allowed?
Best Answer
NEC 250.130(C)(2) Allows connection of ground for replacement receptacles to "Any accessible point on the grounding electrode conductor".
How many wires per connector and size would be subject to the NRTL Listing of the device you are using, which includes the instructions with the device. It seems the smallest wire permitted by the device you show may be larger than the wire you are using.