Re: house ground question..
There is a large part of your problem! A zinc coated ground clamp is meant to be used on galvanized water pipes. For use on a copper rod or pipe you need a brass or bronze ground clamp.
Originally Posted by lamplight
Electrolytic (galvanic) corrosion between the zinc and copper will eat away at all points where the two touch. It will be strongest if they get wet or exposed to high humidity, but that is not necessary for damage to happen.
Last edited by inetdog; August 13th, 2012 at 13:57 PDT.
Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.