Re: OT: Barn Electric

Posted by buickanddeere on November 17, 2006 at 18:15:16 from (216.183.151.194):

In Reply to: OT: Barn Electric posted by Kent in KC on November 17, 2006 at 07:50:11:

#2 aluminum over 400ft? That makes a 30Amp 240V service about the largest legal.
There should be a 30amp breaker at the supply end of that 400ft run.
With a 200amp supply and a dead short 400+ feet from the utility transformer. Odds are the insulation will melt and smoke before the fuse blows on the utility transformer.
Two 10ft ground rods driven full depth and at least 10 ft apart will be required. And at least #6 awg bare copper to connect them together and to the remote panel's ground lug.
The remote panel will have to have the bond screw removed between the ground and neutral bars.
Otherwise VD on the neutral will energize everything connected to the grounds.
As previously stated, one would never consider just a 120V service.
I've seen "certified" electricians who where not qualified to change a U-ground receptacle.

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