Kimble

The panel is located inside and dry. Now I'm wondering if a disimilar metal is involved causing galvanic attack?

Copper wiring, the corrosion covered the length of the exposed ground wire, it was a green color, it was a clean site, vaccant home, and no indication of water intrusion, and I did not see where batteris could have been charged. I made contact with an electrician and he said it could be a bad ground rod connection or a bad batch of wire.

During an inspection today at a modular home I found what appears to be electrolysis on all of the grounding wiring in the service panel. I have inspected many service panels in the past and this is a first. Electrical is not my strongest field. Please give me some ideas.