[psyguy]

I'm want to purchase Whirlpool Energy Star Air Conditioner, 24,000 BTU its run on a 220v dryer outlet. I want to run a new breaker and wire for it, do I need a 10/2 or a 12/2. Its about 70 feet away from my panel box.

 

[Missouri Bound]

The specs. on the air conditioner will tell you what size circuit to use. Then you can use this Wire Size Calculator to determine the wire size. It's unlikely you will need anything larger than #10, but check the specs BEFORE you buy the wire.

 

[COLDIRON]

If it's a big plug like a dryer you better run #10 but check the installation manual first.

 

[bobelectric]

Wire it to the plug rating so the receptacle matches the unit.