Load side of breaker to Utility side of Automatic Transferswitch

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td1236

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I have a 200 amp main panel with one 200 amp breaker, the load side of the breaker feeds a subpanel.

I would like to run a feed from the load side of the main breaker to the utility side of the ATS.


It seems the main issue would be that every time that main breaker is turned off, the generator would kick on. Is there anyway this can be done to code?

Thanks
 
That is to code. Of course the generator would run. That's what a power failure looks like to the ATS.

Thre solution is to manually set the generator to off before manually opening the service disconnect.
 
Perhaps I am missing something in the question but there is noting in the NEC to prohibit the "Utility" (ie: "Line", "Normal Power" side of an ATS from being fed from any source of power.
 
augie47 said:
Perhaps I am missing something in the question but there is noting in the NEC to prohibit the "Utility" (ie: "Line", "Normal Power" side of an ATS from being fed from any source of power.
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My main concern is if someone wanted to service the panel, after turning the main breaker off, the generator would kick on, so they would have to go to the ATS panel and manually by pass the ATS to turn off the generator. I wasn't sure if there was anything In the code against this, or if I would have to put a label that states generator will turn on after turning off main breaker.
 
td1236 said:
My main concern is if someone wanted to service the panel, after turning the main breaker off, the generator would kick on, so they would have to go to the ATS panel and manually by pass the ATS to turn off the generator. I wasn't sure if there was anything In the code against this, or if I would have to put a label that states generator will turn on after turning off main breaker.
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You most likely have to turn the generator off at the generator. A label is a must.
 
td1236 said:
My main concern is if someone wanted to service the panel, after turning the main breaker off, the generator would kick on, so they would have to go to the ATS panel and manually by pass the ATS to turn off the generator. I wasn't sure if there was anything In the code against this, or if I would have to put a label that states generator will turn on after turning off main breaker.
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That is how it works with every generator that supplies the complete load. 700.7, 701.7 and 702,7 all require signage at the service disconnect advising that there is a generator connected to the system.
 
td1236 said:
Okay. Since I am going after the breaker, will I need to remove the ground jumper wire attached to neutral and ground bar on the ATS?
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As you already have a main disconnect, everything after it should (already) be wired as you would a sub-panel, with grounds and neutrals separated. So, yes, if the ATS has a bonding jumper, remove it.
 
ptonsparky said:
OP: This is a good way to limit the load on smaller generators and we did it frequently. Set up a small sub panel with the loads
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How is this set up normally done? As far as the utility side of transferswitch power source and the subpanel location (do you normally place it between the meter and transferswitch?)

Thanks
 
td1236 said:
How is this set up normally done? As far as the utility side of transferswitch power source and the subpanel location (do you normally place it between the meter and transferswitch?)

Thanks
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What you’re calling “the utility side” of the transfer switch is usually fed from a breaker in the main panel.
 
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