Article 445 Generators
- Subtransient, transient, synchronous, and zero sequence reactances
- Power rating category
- Temperature rise at rated load and insulation system class
- Indication if the generator is protected against overload by inherent design, an overcurrent protective relay, a circuit breaker, or a fuse
- Available fault current for inverter-based generators, in lieu of the synchronous, subtransient, and transient reactances
Marking shall be provided by the manufacturer to indicate whether or not the generator neutral is bonded to its frame. Where the bonding is modified in the field, additional marking shall be required to indicate whether the neutral is bonded to the frame.
Exception to (A) through (E): Where deemed by the authority having jurisdiction that a generator is vital to the operation of an electrical system and the generator should operate to failure to prevent a greater hazard to persons, the overload sensing device(s) shall be permitted to be connected to an annunciator or alarm supervised by authorized personnel instead of interrupting the generator circuit.
Exception: Where the design and operation of the generator prevent overloading, the ampacity of the conductors shall not be less than 100 percent of the nameplate current rating of the generator.
Exception: This section shall not apply to generators rated over 600 volts.
- Be equipped with provisions to disable all prime mover start control circuits to render the prime mover incapable of starting
- Initiate a shutdown mechanism that requires a mechanical reset
445.20 Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators
Exception to (A) and (B): If the generator was manufactured or remanufactured prior to January 1, 2015, listed cord sets or devices incorporating listed GFCI protection for personnel identified for portable use shall be permitted.