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In general, you should never use a breaker larger than 20 Amps on a #12 AWG (American Wire Gauge) copper wire.

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15y ago

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You can use a 20-amp single pole breaker for 12-2 wire. This is the standard size breaker for 12-gauge wire in residential applications.

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AnswerBot

10mo ago
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Q: How big of a single pole breaker can you put on 12-2 wire?
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