Testing repaired ground system

[fourteen/two]

Had a job last week where the mechanical guys where getting a tingle while touching the boiler, piping , and air handler. The equipment is located in a damp crawl space with a dug out area. I would not call it a basement.

I located the cold water ground connection and traced the pipes back to see what was going on. At some time in the past the well pipe had been changed to plastic, and so there was no effective ground in the house.

I installed 2 ground rods and a new ground to the electric panel, and disconnected the old cold water ground at the panel.

My question is How do I test the mechanical equipment to make sure the tingle is gone? I don't want to do the touch test.

 

[Buck Parrish]

I would use a standard tester. And use the utilities ground on one side.

I am pretty sure the cold water line is still to be used. As long as ten feet or more is in direct contact with the earth. Does not matter if it is still being used for water or not.

 

[brian john]

1. Installing ground rods will do NOTHING to resolve the issue you have.
2. I would have left the cold water ground intact/connected if it was connected to copper.
3. Get an amp clamp and a multimeter, go to where they were getting the tingle and start measuring VAC.
4. Use your amp clamp on everything you can find that is conductive (water pipes, steam pipes, ground conductors), in addition check for current on the main neutral to ground bond and for zero sequence currents.
5. When you locate current start turning off circuits.
6. Isolate and conquer.