Breaker Panelboard
May 17
2008
2008
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Breaker Panelboard
Is it advisable to replace a 600V rated breaker to a 480V ones of the same AT rating?
Our system voltage is 480V, for sure it is applicable. But what would be the effect on the system coordination? Or in a panelboard with 600V branch breakers,can I add a 480V breaker on its spaces?
breakers control Amps not Voltage. as far as I know the working voltage would determine the voltage at which the breaker might arc or break down.
Remember Apollo 13? the explosion was due to a switch element that was rated for the wrong voltage when the system V was changed.
when in doubt, follow the specs
NABCO Breaker How to Series # 2
