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Re: OT: Electrical Grounding


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Posted by buickanddeere on February 13, 2010 at 14:06:58 from (209.240.124.62):

In Reply to: Re: OT: Electrical Grounding posted by regularguy on February 13, 2010 at 11:56:57:

As previously stated. Two sets of neutral to ground bonds a few feet apart in the meterbase/main switch or main distribution panel. Are close enough not to cause problems.
Problems arise when the neutral is carrying current and has normal voltage drop all conductors suffer.When somebody goes and bonds it somewhere to ground and makes a path.For neutral current to now also flow on the ground system.
Imagine now when some jackleg electrician plugs in a standby generator into a 240V welding receptacle and tries to push neutral current through the grounding system.
The only path for neutral current can end up being from the building ground rods. Through earth and to the ground rods at the service transformer.
Because the grounding system and earth are not perfect conductors. The grounded system is going to be "live" to some degree. Somewhere between 1 and 120V depending.


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