The following seems undefined in the NEC as to whether it is a violation. I have a service entrance that feeds the whole building, but not one room. I have another service entrance that feeds this room not fed from the main service entrance. This room is the emergency circuit which also is on back-up generator power comming from another facility.
The NEC says you can have a separate service entrance as an exception if the second service entrance is for emergency power or standby power. I would think the assumption is that the main service entrance must feed the entire building including the other room mentioned above while the second service entrance is inactive until such time emergency power is needed from either the second source generator or the second source power for the room mentioned above.
I would hope that the first service entrance does not have to feed the whole building since that would represent my position I require to save money and meet schedule.
The NEC says you can have a separate service entrance as an exception if the second service entrance is for emergency power or standby power. I would think the assumption is that the main service entrance must feed the entire building including the other room mentioned above while the second service entrance is inactive until such time emergency power is needed from either the second source generator or the second source power for the room mentioned above.
I would hope that the first service entrance does not have to feed the whole building since that would represent my position I require to save money and meet schedule.