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Transformer bonding #78900
11/06/01 05:53 PM
11/06/01 05:53 PM
T
tmon  Offline OP
Member
Joined: Jul 2001
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

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Re: Transformer bonding #78901
11/06/01 11:56 PM
11/06/01 11:56 PM
G
Glenn  Offline
Member
Joined: Jan 2001
Posts: 75
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).]

Re: Transformer bonding #78902
11/07/01 08:14 AM
11/07/01 08:14 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,280
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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