How big of a central air conditioner do I need?
What does it mean if my central air unit is leaking a lot of water suddenly?
What does the blue wire attach to in a central air unit?
What is the proper sizing for a central air duct?
What size central air unit do I need for 2800 square feet?
Why does my central air unit keep running after the indoor unit stops?
Why is my central air not running?
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.
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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