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What is 1A/1B aux contacts?

The ``A`` contact is an auxiliary contact that will be closed when the breaker is closed, and open when the breaker is open or tripped. The ``1B`` contact will be open when the breaker is closed, and closed when the breaker is open or tripped. 2A/2B and 3A/3B are multiples of the 1A/1B arrangement.


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