I have a project that has a 400A 480V 3 Phase feeder to an electric boiler that the room is physically too small to install a 400A disconect switch and have proper clearances. Can we use 430.102(B) for our exception to include a locakable device on the molded case circuit breaker? I am not sure if you consider an electric boiler as a motor or if there is another article that is better to represent the exception I am looking for.
Thanks,
-Ed
Thanks,
-Ed