Home owner say's that they are getting shocked from the bath tub's faucet. I have checked everything that I could think of. I installed an 8ft ground rod, properly bonded electrical system to the water meter and made sure that the point of attachment is tight. I also made sure that the connections in the new meter can and the new "Cutler Hammer" panel are tight. I installed the panel and the grounding system 6 years ago.
The water pipes are completely exposed in the basement. I grounded the hot/cold water supply pipes at the location where they accend to the bathtub.
This is a natural gas hot water tank and the water is supplied by the municipality ( City of Detroit). The pipes are galvanized. No plastic can be seen. I don't know what's behind the walls.
This problem is inconsistant. It initially happened in Oct 2006. The home owner called me today and told me that the problem is re-occuring.