Under normal circumstances, a circuit breaker lasts for years without ever needing repair or replacement. However, from time to time a circuit breaker will actually “break.” Diagnosing a circuit breaker problem is not a project that an amateur should attempt on his or her own. Only the most skilled do-it-yourselfers can handle this project. Unless [...]
Source: http://www.theelectricconnection.com/electrician-los-angeles-test-circuit-breaker-damage/
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