Question about Heating & Cooling
If you're talking about the high voltage wiring, the answer could be yes if it is a 3 phase unit. That means you have 3 separate legs of "hot". Many rooftop units are 230v 3 phase in the US. Single phase would have two hot wires and a ground. Look in the disconnect box. If there are 3 fuses you have a 3 phase unit. If you have 2 fuses, you have a single phase unit. Be careful, you are dealing with very high voltage and very dangerous.
Posted on Apr 11, 2011
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Posted on Jan 02, 2017
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