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Question by  matt25 (24)

Can you tell me how to determine the right size breaker for a central air unit?

 
+6

Answer by  kipcat (1964)

Figure 1. 5 hp per ton, so a 3 ton unit would be 4. 5 hp times 746 watts in a hp equals 3357 divided by line voltage 220 equals 15. 26. Include a safety factor, and a 20 amp breaker would do it.

 
+5

Answer by  Randy76 (95)

It is very simple to determine the right size breaker for a central unit because it is written on the manufacturer's tag on the unit itself.

 
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