Here’s the deal:
I recently purchased a 1907 bungalow with galvanized piping. I plan on replacing most of it, but have a couple questions:
- The main service coming from the street is galv. It is grounded back to the panel/ground rod. Assuming I keep the ground on the galv, is there anything else I need to do by code, or as a precaution?
- Where I make the union between the copper & galv (right after the meter & shut off) I am using a dielectric union. Do I need a ground between the different pipes? I would think that it would defeat the dielectric union. Right now, there is a ground across the meter from galv to galv.
- There is a grounding wire connecting the cold (in) and hot (out) pipes of the gas water heater, is there a need to do that in the case of copper?
- There is one other location in the basement (exposed joists) where there is a grounding wire connected to a galv supply line, leading into a wall. I assume it is for the old ungrounded wiring (there is a mix of new romex and old 2-wire ungrounded, I plan on straightening out/replacing in the near future). What do I do in the mean time to ensure I don’t screw up the apparent grounding of the old wiring?
- Is there anything else related to the grounding issue with pipes I should be aware of?
Thanks for the help guys!!!