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Message from discussion Subpanel bonding (3-phase mains) question
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Mike Cook  
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 More options Nov 6 2009, 6:32 pm
Newsgroups: sci.electronics.design, sci.electronics.misc, rec.crafts.metalworking
From: Mike Cook <mc...@NOTyahoo.com>
Date: Thu, 5 Nov 2009 23:02:25 -0800
Local: Fri, Nov 6 2009 6:32 pm
Subject: Subpanel bonding (3-phase mains) question
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Is it never allowed (US National Electrical Code) to bond the ground bus bar
to the neutral bus bar?

I opened a subpanel and found that both the ground bus bar and cabinet were
bonded to the neutral bus bar.

Is this allowed under any circumstance?

This is a "Y" 208/120 configuration utilizing 5 conductors in an industrial
building.

Thanks.


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