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    pmcar1's Avatar
    pmcar1 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Apr 23, 2011, 10:54 AM
    2 main breakers on sub feed?
    I am backfeeding an existing 200 amp panel from a new 400 amp 1ph 120/240v service that is 60 feet away. The existing panel has a 200 main breaker. I am planning on a 200 breaker in the new 400 amp panelboard to protect the subfeed conductors (SER 4/0 AL). Are there any NEC rules against having more than one overcurrent device in the subfeed circuit?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Apr 23, 2011, 12:44 PM

    No there isn't.

    I am curious though. Are you the owner? Contractor? Electrician?
    Anyone doing work on a scale like this should NOT have to ask these questions.
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