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    beeker5253's Avatar
    beeker5253 Posts: 1, Reputation: 1
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    #1

    Aug 15, 2012, 08:41 AM
    Maximum amp on circuit breaker
    I have a 30amp duplex breaker (220) for my old A/C unit. My new A/C unit only requires a 15amp duplex breaker (220). Can I keep the 30 amp breaker or do I have to change to 15 amp. I know that I have to change the receptacle to a 6-15P from the existing 6-30R
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
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    #2

    Aug 15, 2012, 09:11 AM
    You must follow the installation instructions for the equipment..
    If you don't you likely would void the warranty.

    Providing a fused disconnect "at the unit" with 15 ampere fuses would be a good solution, then you can keep the wire, assuming it is #10 awg, and the 30 ampere circuit breaker.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Aug 15, 2012, 09:12 AM
    Once you change the receptacle to the 6-15R, the breaker needs to be changed to a 15 Amp.
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