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    wolfsden's Avatar
    wolfsden Posts: 2, Reputation: 1
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    #1

    Apr 14, 2010, 05:15 AM
    Electrical transfer switch
    I have a 2 pole 60 amp Manuel transfer switch. I am installing a 2 pole 60 amp breaker in my main panel with #6 wire ( 2 hots and a neutral plus ground) to feed the 2 pole 60 amp transfer switch. From the main lugs on the 2 pole 60 amp transfer switch I am feeding a sub panel with #6 wire ( 2 hots and a neutral plus ground) . In the sub panel I will have 8 ckt breakers that will be feeding various appliances (Watts will not exceed 7000). In the garage I will install a 30 Amp 240 volt Generator power cord inlet box that I will plug my portable gas Generator into with a 30 amp 240 volt cord. From the 30 amp inlet box I will be installing #10 wires ( 2 hots and a neutral plus ground) to the 60 amp 2 pole manual transfer switch.
    My question is this - The transfer switch consists of two 2 pole 60 amp breakers that can not be in the on position at the same time, one of the 2 pole 60 amp breakers is going to have the # 6 wire from my main panel the other 2 pole 60 amp breaker is going to have the # 10 wire from the generator inlet box, can I have the #10 wire feed to the 60 amp breaker or is it a violation? I can't swap out one of the 2 pole 60 breakers with a 2 pole 30 breaker because that is how the transfer switch is built. The # 10 wire is carrying power that is being made from the generator then going to the 2 pole 60 amp breaker so the 60 amp breaker is not protecting the #10 wire it is protecting the 8 ckt breakers in the sub panel. So will there be any violations with the #10 wire on the 60 amp breaker??
    Missouri Bound's Avatar
    Missouri Bound Posts: 1,532, Reputation: 94
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    #2

    Apr 16, 2010, 03:51 PM
    Does your generator have a breaker on it?
    wolfsden's Avatar
    wolfsden Posts: 2, Reputation: 1
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    #3

    Apr 16, 2010, 04:52 PM
    Quote Originally Posted by Missouri Bound View Post
    Does your generator have a breaker on it?
    Not sure yet I will find out and let you know.
    Missouri Bound's Avatar
    Missouri Bound Posts: 1,532, Reputation: 94
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    #4

    Apr 16, 2010, 05:09 PM
    Some do. And if your generator has a 30 Amp breaker, you should be OK with the 10 ga. Wire. But no way can you use it with 60 amp circuit protection. It's not safe.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #5

    Apr 17, 2010, 04:01 AM
    MB is correct, either the genset needs to have a 30 amp breaker to protect that output, or before the input outlet there needs to be a 30 amp breaker to properly protect the #10 wire feeding the 60 amp breaker in your transfer panel.

    I am sure the genset will have a breaker.
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