It’s not uncommon that circuit breakers fail but testing them before they’re installed can mean life and death in some cases. Keep your employees and clients safe by asking your supplier three key questions when purchasing circuit breakers:

  • Is the product tested?
  • What are the standards used in testing?
  • Will you supply me a report as proof of testing? 

Some of the key reasons circuit breakers fail are mechanical component issues (contacts opening too slowly, binding, or not opening at all), the circuit breaker may have been initially sized incorrectly (for example, a wrong KAIC rating could be the culprit), a relay and auxiliary device failure or loose bolt connections, as well as other environmental factors on the distribution system (ingress of dust/debris, periods of extended heat, massive overcurrent events).