Port. Generator feeding sub panel

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M. D.

M. D.

Senior Member
Is there a way to feed a main panel through a sub panel connection to a potable generator ?
 
Not if you want to comply with the NEC rules. There would be no way to prevent backfeeding the utility.
 
In my head I'm thinking take the normal power to the sub and have go through a two position contactor held closed by utility when the utility drops out those contacts open and close another set that would back feed a breaker in the panel interlocked off with the main so that it could only be turned on when the main is off ?
 
M. D. said:
In my head I'm thinking take the normal power to the sub and have go through a two position contactor held closed by utility when the utility drops out those contacts open and close another set that would back feed a breaker in the panel interlocked off with the main so that it could only be turned on when the main is off ?
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Can you get an ATS configured this way?
 
M. D. said:
In my head I'm thinking take the normal power to the sub and have go through a two position contactor held closed by utility when the utility drops out those contacts open and close another set that would back feed a breaker in the panel interlocked off with the main so that it could only be turned on when the main is off ?
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Read 702.5 I don't think this would be a listed transfer switch
 
petersonra said:
Some kind of key system perhaps?
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To add to what Don said regarding the NEC any interlocking system must be listed and labeled for the application. Often times the goal is to do it the cheap and dirty way in order to circumvent the NEC requirements.
Either the panels must be listed and labeled with the appropriate modification of an ATS should be used.
 
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