Posted by John G. Hasler on July 07, 2012 at 19:51:11 from (174.124.42.244):
In Reply to: Re: hey janicholson posted by Janicholson on July 07, 2012 at 14:11:27:
Janicholson writes: > The ground is thus not used (and the well man is > correct, well water is always mineralized and > very conductive right to the water in that > casing. Even plastic casing with entry holes or > a screen section has way enough ""ground"".)
Well drillers are not electricians, let alone electrical engineers.
While potable water is conductive enough to give you a shock it is not conductive enough to provide an adequate safety ground. You could have a dead short from the pump case to one side of the line and not trip the breaker. I have measured 110VAC from the stub sticking out of the top of a well to the casing (steel pipe, not plastic). The gaskets on the pitless adapter insulated it from the casing and rust insulate the pipe where it came through the cap.
Run a green wire up from your pump and connect it to the steel casing or to your system ground. This will provide a solid safety ground and also help protect your pump against lightning.
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