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View Full Version : 240v transformer to 120,208,240v what wires


Jeremy126
May 17, 2010, 12:16 PM
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
May 17, 2010, 04:27 PM
Its written on the transformer,, 2 colors for 130 V,, the other 2 for 240v

hilma50
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
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.