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What does humming mean from a QO arc fault breaker?

Published date: 16 May 2018

Issue:
Does humming on a QO arc fault breaker indicate a problem?

Product Line:
Miniature Circuit Breakers

Resolution:
The electronics inside the breaker will produce a low humming noise. Solid state dimmers will make them buzz louder, but this is normal and is no cause for concern.

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