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

    Sep 20, 2009, 10:46 PM
    BX color code
    I have an electric water heater that uses 220ac volts. The BX cable from the panel to the heater has a red and black wire inside. I am adding a timer but the wire I have for that has the white, black and copper ground wire. I would like to know what color (red, black on the BX) should connect to the black and white wire for the timer
    Thanks
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Sep 21, 2009, 05:24 AM

    What voltage is the timer? Both the black and the red of the heater wiring are hot legs. There is no neutral in 240V wiring. Sounds like timer is 120V.
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