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#92567 03/26/05 02:23 PM
Joined: Mar 2005
Posts: 236
Member
would an AFI work, if you had a back up power (5kw generator) feeding the breaker?

The breaker would be fed through a manual transfer switch, one side of the switch from
the AFI and the other from the generator.

It seems like the breaker would be an intergal part of the neutral since the banch circuit is landed in it and then bonded to the nutral busbar. And if the breaker is de-energized would it be an open circuit when the generator tries to feed it?

Any thoughts would be appreciated.
Thanks.

2017 / 2014 NEC & Related Books and Study Guides
#92568 03/27/05 01:42 PM
Joined: Mar 2001
Posts: 345
T
Member
Use a double pole double throw transfer switch and it will be a non issue. If you transfer both the neutral and the hot the generator functions as a derived system. The easiest way to provide grounding will depend on how your generator is configured. If its neutral is bonded to the frame then you will need to run a Grounding Electrode Conductor (GEC) from your house's grounding electrode system to the bonding lug on your generator. If the generator neutral is not bonded to the generator frame then it will be easier to bond the neutral to ground in the transfer switch and run the GEC to the grounding electrode system from the switch's enclosure.
--
Tom H


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison
#92569 03/27/05 10:10 PM
Joined: Jan 2005
Posts: 354
P
pdh Offline
Member
How do you intend to comply with 210.12 during the time the generator is supplying power?

#92570 03/28/05 01:55 AM
Joined: Mar 2005
Posts: 236
Member
well 702.3 is specific.
the only thing left is to get a blessing from the "ahj" and filling out a proposal to the panel for an exception here.


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