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1

A current of a few micro Ampere won't start that much corrosion over a period of only a few years. It is most important to avoid any loop in the grounding system. I.e. a star configuration is necessary to connect ground, neutral, metal tubes, metal conduit, metal bath tubs etc. at only 1 location, often close to the metering place. Otherwise it is more ...


3

Yeah, that looks like galvanic corrosion all right. If you have the route for a wire, I would bond the pipes in question to the house's Grounding Electrode Conductor. That will arrest any galvanic corrosion (by giving it a much better current path) and with luck, that better current path will result in the ground fault becoming more feisty, leading to a ...


5

I am much more concerned about whether you have a ground fault or not. If you have electricity actually "leaking" then you have a life safety problem that is far more important than long-term pipe corrosion. The ideal (required by newer code) setup is to have GFCI protection for washing machines. Your receptacle does not have GFCI, but you might ...


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