03:01AM | 11/17/02
Member Since: 11/07/02
9 lifetime posts
I am converting a 220 air conditoner circuit to 110 air conditoner circuit. It has 10/2 wire. Do I use a double pole 20a breaker or single pole? It is for a 12a air conditoner. What are double pole 20a breakers used for?

[This message has been edited by tbone20tnt (edited November 17, 2002).]


04:31AM | 11/17/02
Member Since: 09/17/02
527 lifetime posts
110 volt AC requires only a single pole breaker.


05:13AM | 11/17/02
Member Since: 11/07/02
9 lifetime posts
What are double pole 20a breakers used for?


07:07PM | 11/22/02
Member Since: 11/22/02
1 lifetime posts
All double-pole (regardless of amperage) are for 240/220V. There are two phases in each breaker panel, and they each carry 120V, and go every other pole. So when you have a double pole, you're tapping into both phases. 120V+120V=240V


12:53AM | 11/23/02
Member Since: 11/02/02
72 lifetime posts
I've seen double-pole breakers rated for 120 volts. SquareD's QO215b is rated for 120/240 and takes only one slot. I think, but am not sure, that the idea is to piggyback two circuits on one slot when you are running low on slots in your load center box.


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