Originally Posted by Electron_Sam78
I was looking at the work of a fellow electrician who did a job for our company and found that a 600 amp circuit breaker, serving as the service disconnect, was installed in a Square D I-line panel. The kicker was that the data plate (sticker) rated the panelboard at 450 amps max.
Am I missing something? That would be a violation of the UL listing and the amperage rating of the equipment. That's at least 2 code violations there. Could there be another explanation?
did it say 450 amp breaker?
was the bus rating 450 amps?
or was the main 450 amps?
Don't quite have enough info, but I can think of a few scenarios that it would be legal.