The utility company just left after being here for 3 hours.
They looked in panel and everything was OK.
They pulled the meter and still had 2v on cast iron drain pipe to tub and surrounding waste pipes.
Then they drove another 8' ground rod and used new #4 solid copper to bond it to the panel ground to make sure it was good.
Tested again... Still 2 volts on pipes and tub.
Then they unhooked the transformer... Still 2 volts on pipe and tub.
And the kicker is there is continuity between the tub drain and the faucet knobs that are acting as the path to ground.
What on earth is going on here???
Does anyone have any idea?
The pipes are galvanized steel and cast iron. I know there is galvanic corrosion after 60 years, but enough to become a battery? The other thing is that the meter shows no DC voltage... only AC. Also, the charge does not disapate after shocking you. It remains right around 2 volts...
Is it OK to just drive another rod and run the ground from the waste pipe to that or is it OK to bond it to the cold water pipe either at the panel or jumper from the waste pipe to the closest cold water pipe?
Clearly this has nothing to do with the house power or the utility company.