bc said: (quoted from post at 20:04:40 02/08/10) Mark, I'm not sure I follow you here. At the panel in the barn, you removed the grounding wires from the grounding buss bar but left the neutrals attached to the grounding buss bar and then grounded that bar to the ground rod. That fixed your 2 volts on the waterer. Correct me if I misquoted you.
What did you do with grounding wires that are with the wire runs throughout the barn? They need to be bonded together with a ground rod.
I suspect your problem was that the neutrals and ground wires were on the same buss which is what was done on some old panels. The newer way is to have a separate neutral/grounded buss bar for neutrals only and a separate grounding buss bar for the bare or green colored wire grounding wires that are with your wire runs and probably nm wire. When separate grounded/neutral and grounding buss bars are used, there is screw on that neutral/grounded buss somewhere that is screwed in so it contacts the metal of the panel box to which the grounding buss bar is attached.
I guess you need to clarify which type of buss bar system your panel has and how you have the grounding wires grounded. If you don't have separate buss bars, you can buy the separate on at most places that sell panels and breakers.
What he said was that he separated the neutrals and grounds, and in the end, grounds & panel box are tied to ground rod(s). Neutrals all alone, by themselves.
Communications with words is so difficult. Drawings are nice.
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