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    Jeremy126's Avatar
    Jeremy126 Posts: 13, Reputation: 1
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    #1

    May 17, 2010, 12:16 PM
    240v transformer to 120,208,240v what wires
    I'm replacing a 240v transformer in a split heat/cooling unit. The old trans has 4 prongs 2 load 2 line the new one has two secondary and 4 primary wires what wires do I use for primary?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    May 17, 2010, 04:27 PM
    Its written on the transformer,, 2 colors for 130 V,, the other 2 for 240v
    hilma50's Avatar
    hilma50 Posts: 1, Reputation: 1
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    #3

    Jun 5, 2014, 05:08 PM
    What color goes with what color on new universal transformer 240v to 12 v for a/c unit?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Jun 5, 2014, 08:00 PM
    The transformer should be marked. For example, the one I am looking at now is a 4/2 and says" Primary-white-common(neutral), 120V-Black, 208V-Red, 240V Orange. Secondary, 24V red-Green. 3 input voltages, 1 output voltage.
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