Have I got this right?
“I've got a customer that is getting transient voltage [and amperage] to traveling down his well pump [chassis grounding/bonding conductor into the Earth].
He It is getting showing peaks of 7-9 volts from across the pump ground chassis to the ground[ing bond] coming into the pump from the Service.
The pump['s electronic controls] doesn't want can't withstand anything over 1.5v swings in chassis potential. [Making it a floating ground that pumps current in and out of chassis grounded capacitors within its logical assembly.] This burned up their last pump['s integral controller] over a year['s time]. They are I'm trying to figure this out. I spoke to the pump installer who seems pretty knowledgeable.”
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The entire problem is that your bonding run is now part of the GEC assembly -- and you're seeing the effect of a lousy neutral to GEC assembly situation.
Everyone else: be aware. This is now common because of plastic plumbing.
Last edited by Tesla; 01/31/13 08:15 PM.
