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// CODE SNIPPET

250.34 Portable and Vehicle-Mounted Generators

National Electrical Code 2017 of New York State > 2 Wiring and Protection > 250 Grounding and Bonding > 250.34 Portable and Vehicle-Mounted Generators
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(A) Portable Generators

The frame of a portable generator shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by the generator under the following conditions:
  1. The generator supplies only equipment mounted on the generator, cord-and-plug-connected equipment through receptacles mounted on the generator, or both, and
  2. The normally non-current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame.

(B) Vehicle-Mounted Generators

The frame of a vehicle shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by a generator located on this vehicle under the following conditions:
  1. The frame of the generator is bonded to the vehicle frame, and
  2. The generator supplies only equipment located on the vehicle or cord-and-plug-connected equipment through receptacles mounted on the vehicle, or both equipment located on the vehicle and cord-and-plug-connected equipment through receptacles mounted on the vehicle or on the generator, and
  3. The normally non-current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame.

(C) Grounded Conductor Bonding

A system conductor that is required to be grounded by 250.26 shall be connected to the generator frame where the generator is a component of a separately derived system.
Informational Note: For grounding portable generators supplying fixed wiring systems, see 250.30.

Related Code Sections


250.34 Wiring and Protection, Portable and Vehicle-Mounted Generators
located on the vehicle and cord-and-plug-connected equipment through receptacles mounted on the vehicle or on the generator, and The normally non ...
National Electrical Code 2017 of New York State > 2 Wiring and Protection > 250 Grounding and Bonding > 250.34 Portable and Vehicle-Mounted Generators
(6) Special Conditions, Means for Connecting Portable or Vehicle-Mounted Generator
Where the COPS is supplied by a single generator, a means to connect a portable or vehicle-mounted generator shall be provided ...
National Electrical Code 2017 of New York State > 7 Special Conditions > 708 Critical Operations Power Systems (COPS) > 708.20 Sources of Power > (F) Generator Set > (6) Means for Connecting Portable or Vehicle-Mounted Generator
(L) Special Equipment, Generators
Generators shall be installed in accordance with 445.10 through 445.12, 445.14 through 445.16, and 445.18. Grounding of portable and vehicle-mounted ...
National Electrical Code 2017 of New York State > 6 Special Equipment > 640 Audio Signal Processing, Amplification, and Reproduction Equipment > 640.3 Locations and Other Articles > (L) Generators
(B) Equipment for General Use, To Be Grounded
conductor. Exception No. 1: Receptacles mounted on portable and vehicle-mounted generator sets and generators in accordance with 250.34. Exception No. 2 ...
National Electrical Code 2017 of New York State > 4 Equipment for General Use > 406 Receptacles, Cord Connectors, and Attachment Plugs (Caps) > 406.4 General Installation Requirements > (B) To Be Grounded
(B) Wiring and Protection, Ungrounded Systems
). Except as permitted by 250.34 for portable and vehicle-mounted generators, the grounding electrode shall comply with 250.30(A)(4 ...
National Electrical Code 2017 of New York State > 2 Wiring and Protection > 250 Grounding and Bonding > 250.30 Grounding Separately Derived Alternating-Current Systems > (B) Ungrounded Systems
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