Codified
Member
- Location
- Orange County, CA
The words "first disconnecting means" appear in several places in NEC Article 250, including for 'separately derived systems' like generators. Given a large portable generator (equipped with its own CB, protecting its load conductors), that temporarily serves as a 'separately derived system' for a nearby building service panel, what is the "first disconnecting means"? Is it the CB on the generator - or is it the MCB in the building service panel?