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Old 11-05-2012, 06:46 AM   #1
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Backfeeding with generator.


how to backfeed 200amp house panel from 100amp shed panel with portable generator safely and by code?
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Old 11-05-2012, 07:42 AM   #2
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Backfeeding with generator.


Install a proper transfer switch or breaker interlock system on the main panel.
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Old 11-05-2012, 08:08 AM   #3
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Backfeeding with generator.


That cant be done legally. Dedicated wires for the generator should be run from the main panel to the generator location.

Last edited by Auger01; 11-05-2012 at 08:44 AM.
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Old 11-05-2012, 09:57 AM   #4
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Backfeeding with generator.


Quote:
Originally Posted by neckbone View Post
how to backfeed 200amp house panel from 100amp shed panel with portable generator safely and by code?
This is a good question.
When back feeding the house panel from the shed panel, an interlock will not work.
The generator power must go to the main panel first to use an interlock.
This is an issue for many people including myself.
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Old 11-05-2012, 09:57 AM   #5
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Backfeeding with generator.


Thanks for responding to my question, I am trying to run generator in shed to minimze noise and theft.
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Old 11-05-2012, 10:37 AM   #6
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Backfeeding with generator.


I see another post from 2010 talking about this topic.Can I run additional cable undergroung through same conduit from shed receptical to proper breaker in main box with interlock and get my result. thanks
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Old 11-05-2012, 11:11 AM   #7
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Backfeeding with generator.


IF the conduit is big enough fo the extra wires then sure.
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Old 11-05-2012, 11:36 AM   #8
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Backfeeding with generator.


Yup I used 2inch plastic. Have you ever pulled cable through conduit, I never have, any ideas or is it just pull. Thanks
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Old 11-05-2012, 02:07 PM   #9
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Backfeeding with generator.


The best way is to unhook the wires in the conduit and attach a rope to them and pull them out. If you try to pull new wires in with the old ones still in the friction may burn through the insulation in spots.

Use the rope that got pulled in to pull ALL wires in at once. They do make wire lube to make them go in easier. Thats about it.
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Old 11-09-2012, 02:37 PM   #10
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Backfeeding with generator.


Auger01 thanks for the help. I decided not to connect generator at shed,too much can go wrong, expense of cable and power drop due to distance.
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Old 11-09-2012, 04:22 PM   #11
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Backfeeding with generator.


Quote:
Originally Posted by neckbone View Post
how to backfeed 200amp house panel from 100amp shed panel with portable generator safely and by code?

I dont think backfeeding is code compliant
under any circumstance !

You must have a proper transfer switch / interlock.

If you want it to be code compliant.
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Old 11-09-2012, 05:12 PM   #12
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Backfeeding with generator.


yup I would be using interlock. All my materials r on the way, did plenty of research on this. When I am ready to install I will post my installation plan to double check myself.
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Old 11-19-2012, 06:43 AM   #13
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Backfeeding with generator.


Just set the house up for backfeeding my generator, 4 prong inlet on outside of house, 10/4 wire from inlet to 30amp double pole breaker, with interlock on main panel, wasnt too hard to do, next is inspection by electrical inspector. My question, how neccessary is a watt meter during backfeed. Thanks

Last edited by neckbone; 11-19-2012 at 07:45 AM.
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Old 11-19-2012, 10:43 AM   #14
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Backfeeding with generator.


Not at all necessary. With an interlock set up, you will have to use the trial and error method to see what will run on generator power. And how many things will operate at the same time. Try this before you loose power and then you will have a good idea as to what will run and what can run together.
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Old 11-19-2012, 11:08 AM   #15
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Backfeeding with generator.


Thanks J.V.
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