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    farmer1234's Avatar
    farmer1234 Posts: 3, Reputation: 1
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    #1

    Sep 27, 2013, 11:35 AM
    400 AMP Main service
    I have an exsisting 400 AMP service with 2-200 AMP sub-services, can I replace one of the sub-service and replace it with a new 400 Amp sub- service without replacing the incoming feeder cable from the outdoor transformer?
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #2

    Sep 27, 2013, 12:08 PM
    Are you asking if you can replace a 200 amp service wit a 400 amp and a 200 amp being fed by a 400 amp supply?

    Will both of the new services be at full load?
    farmer1234's Avatar
    farmer1234 Posts: 3, Reputation: 1
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    #3

    Sep 27, 2013, 12:22 PM
    Quote Originally Posted by donf View Post
    Are you asking if you can replace a 200 amp service wit a 400 amp and a 200 amp being fed by a 400 amp supply?

    Will both of the new services be at full load?
    No, they will not
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #4

    Sep 27, 2013, 01:31 PM
    I'm not sure what you are asking. If you are asking if you can replace a 200A panel with a 400A panel the answer is no.

    What do you mean by sub-service?
    A 400A residential service with two 200A panels is pretty common these days. The 200A panels are not sub-services. They are both service panels.
    farmer1234's Avatar
    farmer1234 Posts: 3, Reputation: 1
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    #5

    Sep 27, 2013, 01:50 PM
    Quote Originally Posted by stanfortyman View Post
    I'm not sure what you are asking. If you are asking if you can replace a 200A panel with a 400A panel the answer is no.

    What do you mean by sub-service?
    A 400A residential service with two 200A panels is pretty common these days. The 200A panels are not sub-services. They are both service panels.
    This is 2 industrial unit, with 2-200 amp sub-service supplying power to the units, both 200amp is being fed from the exisisting 400 amp main service, can I replace one of the 200amp with a 400 amp sub-service.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #6

    Sep 27, 2013, 03:27 PM
    No, you cannot.
    Please call an electrician.
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