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    ksdavid's Avatar
    ksdavid Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 10, 2012, 03:22 PM
    3 wire 220v supply to 4 wire 220v appliances?
    I have a 3 wire supply to my oven #8 black, #8 white and a bare copper wire. Both black and white are hot - 120V on both to the copper wire. I just bought a new 220V oven that is 4 wire - black, white, red and copper. How do I hook it up? Black to black, red (oven) to white, white (oven) and copper to copper?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Jan 10, 2012, 03:33 PM
    You cannot use this circuit.

    Your new oven requires four wires, two hots, a neutral and ground. This is a 120/240v circuit.
    Your existing circuit is 240v only and has only to hots and a ground. There is NO way to wire the new to the old.
    Sorry.

    Please don't let anyone tell you about old 3-wire circuits being allowed, this does NOT apply.
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