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    JUNEZ's Avatar
    JUNEZ Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jul 19, 2009, 11:13 PM
    How many amps required for split system
    We need to install a heating/cooling split system inverter (8.0w/9.0w by memory).
    We have an exsiting 16amp isolator for the a/c unit and the label on the unit says heating/cooling requires 11amp. However the instruction manual says 30amp fuse is required.
    We've spoken to 2 electricians, one says that the 16amp fuse is sufficient while the other one says that we need more.

    Any suggestions.. Thanks!
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jul 20, 2009, 12:03 AM
    You go by circuit ampacity for the device or unit you are wiring. If it calls for a 30 amp circuit then usually number 10 copper and a 30 amp breaker along with a proper size inverter for the unit.
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