I fixed a problem like this. A house grounding wire was attached to the cold water line. The painters had knocked it off during the week. The ladies got shocked in the shower!
I cleaned the pipe to bare metal and tightly reconnected the ground. Problem solved.
That sounds like an enlightening experience
10/1/11: Bought the perfect house;11/1/12: 10k & 200 hours into the perfect house; Floors are done and cutting up the cement for the new bathroom that wasn't actually plumbed like the seller said it was; 8/1/13: 30k & 400 hours into the perfect house that only needed new carpet and a coat of paint...
12/1/13: 35k & 500 hours I hope it ends soon
02/1/14: 37k & 550 hours and the inside may be finished soon.