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

    Jul 2, 2008, 10:22 AM
    10/2 wire to carry 220 v - panel attachment
    The HVAC guy will install the AC but I need to get 220 v to the compressor. The house was wired when it was built and I have a 10/2 wire running from the panel to a box in the furnace room. The black is loose in the panel and the white is attached to a common.

    The panel has one open spot but I will have to do a little doubling up to get the two I need for 220.

    Here's the question: I think I need a red black white 10/3 to run 220. But the wire is 10/2. Can I get 220 to the AC unit? How?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Jul 2, 2008, 10:37 AM
    You may be able to get a TWIN breaker for your panel. This gives two independent breakers in a single space, so you don't have to pigtail circuits.

    The AC only needs 10/2. Neutral is normally not needed.
    trpw's Avatar
    trpw Posts: 3, Reputation: 1
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    #3

    Jul 2, 2008, 10:42 AM
    Sweet. I feel better. I am not totally capable of doing this but my expert friends are. I will get the right breaker somehow.

    I assume we will run the white and black with power and take the white off the common?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Jul 2, 2008, 10:46 AM
    Yep.

    The TWIN breaker will replace two 120 V circuits.
    The 240 V, 2 pole breaker (Handles move together) will be for the AC.
    trpw's Avatar
    trpw Posts: 3, Reputation: 1
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    #5

    Jul 2, 2008, 10:52 AM
    It will make sense when I hold the twin in my hand and look. Electricity generally makes sense but I have trouble when it gets to no neutral. There's a ground somewhere.

    Thanks. My expert will wire the breaker properly since he can wire a house including 220 for a range. He will figure it out.
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