Had an unorthodox situation today. The main service disconnect was on the inside of garage wall (at an exterior wall.) The ground wire was ran up from the panel, across the attic, and then down the wall between garage/house. I have no idea where it went after that. There was no reason it couldn’t have been “conventionally” done at the exterior. Question: Is there a max distance from the panel or meter base for the ground wire to connect to ground rod or similar? Does the ground wire have to be up-sized any for a greater distance?
1972 house. 150 amp panel. Approx. #6 braided copper wire.
Thanks in advance.