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    Jim Squires's Avatar
    Jim Squires Posts: 1, Reputation: 1
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    #1

    Sep 30, 2008, 04:20 AM
    Wire Identification
    Hello. I am replacing my manual heating thermostat with a digital thermostat. There are two identical black wires coming from the new digital thermostat. How do I know which one attaches to the live (red) wire coming out of the box? Will I damage the new thermostat if I hook them up wrong?
    rtw_travel's Avatar
    rtw_travel Posts: 347, Reputation: 36
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    #2

    Sep 30, 2008, 11:48 AM

    What kind of heater is it? Electric baseboard/ gas furnace/ etc. If electrical, how big & what voltage?
    EPMiller's Avatar
    EPMiller Posts: 624, Reputation: 37
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    #3

    Sep 30, 2008, 05:28 PM

    Read the instructions. I've learned a lot that way.
    hedlok's Avatar
    hedlok Posts: 32, Reputation: 2
    Junior Member
    		  
    #4

    Sep 30, 2008, 07:01 PM

    If there are 2 identical wires it may not matter how they are hooked up... I would encourage you to read the instructions. If this is to control 220 volt electric baseboard the 2 identical wires may be a pass through for one of the legs. Again I encourage you to follow the instructions
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