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Answer for USA, Canada and countries running a 60 Hz supply service.

Breakers are rated in amperage and by the amount of poles that they have. Your classification of a 220 breaker is described in electrical terminology as a two pole breaker.

Choosing the amperage of the two pole breaker depends upon the 220 volt load that it feeds.

Two pole breakers for 220 volt loads.

Single pole breakers for 120 volt loads.

If the service is only 120 volt then every other bus bar in the panel will be energized. If the panel is a 120/240, then every bus bar in the panel will be energized.

This is how and why a 240 volt load requires a two pole breaker.

To the answer, yes you an use a two pole breaker in a 120 volt service but only one side of the breaker will have voltage on it depending on where it is situated in the panel board.

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12y ago

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