ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
100 Definitions: Accessible 2023
by gfretwell - 07/22/24 09:03 PM
Chinese motors rated 220 v 50 hertz
by sabrown - 07/22/24 04:29 PM
240V only in a home and NEC?
by emolatur - 07/18/24 01:05 PM
2023 CEU Course
by gfretwell - 07/17/24 01:08 AM
Is this really a thing
by dsk - 07/16/24 01:23 PM
Recent Gallery Topics:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 264 guests, and 22 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#92567 03/26/05 02:23 PM
Joined: Mar 2005
Posts: 240
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.

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & 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: 240
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.


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5