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

    Oct 19, 2011, 08:05 AM
    200 amp main to a 100 amp sub panel.
    I have a 200 amp main in the garage that is completely full. I want to add a 100 amp sub panel right next to it,(a few feet away) so I can add some wiring to the attic and basement. What size cable is required to connect the 200 to the 100 sub indoors just a few feet away?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Oct 19, 2011, 08:20 AM
    You may use either #3 copper THHN or #1 aluminum XHHW .
    ibkorthy's Avatar
    ibkorthy Posts: 3, Reputation: 1
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    #3

    Oct 21, 2011, 05:18 AM
    Is it OK if I already bought 2224?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #4

    Oct 21, 2011, 06:13 AM
    I will assume the #2 is aluminum, which you may use only if you protect it with a 90 Amp breaker.

    Would have been good to mention that in your original question.
    ibkorthy's Avatar
    ibkorthy Posts: 3, Reputation: 1
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    #5

    Oct 21, 2011, 10:00 AM
    I didn't buy it until my question went unanswered for 2 days, The electrical guy at Home depot said 2 2 2 4 would be the way to go. 100amp breaker. I'm only running 2-15amp and 1-20amp circuits from it. I have an electrician friend coming to install it so if he says its not right I will toss it. I only needed 6 feet of it. He is out of state hunting and I can't get in touch with him until sat. Was hoping to have everything here ready to go for him. Thanks for the reply. Much appreciated.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #6

    Oct 21, 2011, 01:09 PM
    Clerks in stores should not be giving advice unless they have a license for that trade. And he is incorrect on the 100 Amp breaker on this feeder with #2 Al to a subpanel.


    What I see for date/time stamps is you posted a question on 10/19/11 at 11:05 AM and me answering the same day at 11:20 AM. Is that what you see?

    Since you have an electrician installing the feeder, any liability or code violations will fall under his license.
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