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Back feed electric 12 wire

Asked Feb 10, 2010, 07:21 AM — 15 Answers
200 amp service in my house...#10 wire going to the garage 120 foot away.... For 220 service through a 30 amp 220 braker... I'd lite to back feed to the house with a 6250 generator....generator puts out 220 with 20 amps on each side...with #12 wire...can I use the 12 wire ...run it 20 feet to my sub panel that's in the garage...my sub has is own ground rod...ground and nutrual are seprate..when the main 200 amp braker is off and I'm back feeding....any danger with the back feed through the nutual going out to the field?
Thank you my friend....richard

15 Answers
Stratmando's Avatar
Stratmando Posts: 10,420, Reputation: 2515
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#2

Feb 10, 2010, 07:27 AM
Yes their is a danger without a Interlockkit kit.
I feel an Interlockkit is the cheapest, fastest, safest way.
http://www.interlockkit.com/
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Stratmando's Avatar
Stratmando Posts: 10,420, Reputation: 2515
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#3

Feb 10, 2010, 12:46 PM
I wouldn't say to do that, but if someone did, they should clearly mark the 200 amp breaker to remove backfeed prior to hooking back up.
Lock or tape in the off position.
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tkrussell's Avatar
tkrussell Posts: 9,673, Reputation: 3698
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#4

Feb 10, 2010, 01:11 PM


I suggest you check with your utility company, see what they have to say about backfeeding a service without the appropriate, approved method,such as an Interlock Kit.

In the event you send power out onto the grid, you will get to meet several burly linemen, hopefully none that got injured, or worse. They will gladly cut your home free from the grid, and someday,come back and re-connect your service, providing there was no death of a lineman.
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Stratmando's Avatar
Stratmando Posts: 10,420, Reputation: 2515
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#5

Feb 10, 2010, 01:27 PM
I have heard people frezzing to death from No Electric/Heat.
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tkrussell's Avatar
tkrussell Posts: 9,673, Reputation: 3698
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#6

Feb 10, 2010, 01:36 PM


And your point is?

Quote:
Originally Posted by Stratmando View Post
I have heard people frezzing to death from No Electric/Heat.
Richard does not mention that this is an emergency situation. Sounds like he is collecting information to do this project. So he has the time to plan and do the project properly to conform to Code and Utilty requirements.

IF this was an emergency situation, AND the only method to restore heat would be to backfeed a service on a temporary basis, then there could be other means of preventing sending power back out on the grid and potentially killing someone trying to repair the utility problem.

Freezing to death takes hours, maybe days to die.

Electrocuting someone only takes a second.
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stanfortyman's Avatar
stanfortyman Posts: 4,883, Reputation: 1326
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#7

Feb 10, 2010, 02:48 PM


Quote:
Originally Posted by tableclocks View Post
grid systen won't be fed if I turn off the main.....daaaaa.....will it
This point is completely moot. There is NO WAY you can do this with 100% certainty without some sort of interlock or transfer device.

You saying "I'll be safe" does NOT cut it.

Illegal backfeeds are the bane of electricians and linemen alike. Linemen risk their lives every time they go out to work during an outage because there is always some moron with an illegal back feed and chance are someone will make a mistake at some point. This whole issue would not BE an issue if things like this did not happen.
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Stratmando's Avatar
Stratmando Posts: 10,420, Reputation: 2515
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#8

Feb 10, 2010, 03:26 PM
I appologize, I thought this was the Guy in Maryland that was Snowed in. Don't know what happened to that post?
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tkrussell's Avatar
tkrussell Posts: 9,673, Reputation: 3698
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#9

Feb 10, 2010, 04:01 PM
Don't know, and no need to apologize, no offense taken here.

If this is an emergency, the poster does not say that, unless I am missing something, but in times of trouble I would be the first to do what is necessary, but being sure to take extra caution until the emergency is over. Then take measures to do it right so the next time connecting the genset would not be a problem. Or cause problems.
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LandserElectric's Avatar
LandserElectric Posts: 15, Reputation: 5
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#10

Feb 10, 2010, 06:20 PM
I'm in the camp that its not cool. Get a manual trasfer switch or that kit in the link. I hate putting welding plugs in for homeowners because you know what they intend to do. He's not in an emergency, he's planning for one. When people are stressed or full of adrenaline you get forgetful real quick.
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