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timdwoodworking 12-11-2007 08:27 PM

Electrical bonding
 
I am installing an electrical panel to a pole barn. The barn is a wood structure with metal roof and siding. I was told by local vendor that I need to bond the siding (he didn't say anything about roof) and water supply to the panel. Is this just a matter of tying to two together with conductor or is there something else I need to do? Also,why is this necessary?

Speedy Petey 12-11-2007 08:42 PM

The water must be bonded as it is expressly stated in the code. The siding only is suggested to be bonded if it is likely to be energized. IMO this is not likely.

Here is the NEC Handbook commentary on this:

Because metal siding on buildings is not electrical equipment, it is outside the scope of the Code [see 90.2(A)]. Therefore, the Code cannot require that it be grounded. Quite often, however, luminaires, signs, or receptacles are installed on buildings with metal siding that could become energized. Grounding of metal siding reduces the risk of shock to persons who may come in contact with siding that has become energized.

chris75 12-11-2007 08:55 PM

1 Attachment(s)
Attachment 1867
Just an example.

timdwoodworking 12-11-2007 09:02 PM

Thanks a bunch to both of you for the reply!


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