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#78900 - 11/06/01 01:53 PM Transformer bonding
tmon Offline

Registered: 07/05/01
Posts: 29
On a pad mount transformer, how are the bonding jumpers sized that bond the metallic raceways (grounding bushings)within the primary and secondary sections? Thanks, Tom

2014 / 2011 NEC & Related Books and Study Guides
#78901 - 11/06/01 07:56 PM Re: Transformer bonding
Glenn Offline

Registered: 01/17/01
Posts: 78
Tom, suggest 1999 NEC 250-80, 250-102(c), 250-28(d) assuming this is an Utility Co. transformer, other wise 250-30 for secondary side and 250-122 for primary side.

[This message has been edited by Glenn (edited 11-06-2001).]

#78902 - 11/07/01 04:14 AM Re: Transformer bonding
electure Offline


Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
If this is an exclusively utility controlled xfrmr, the NEC isn't applicable per 90-2(b)(5). You would need to get the spec from the serving utility.


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