Code Q&A

Q. What are the grounding requirements for a generator mounted on a vehicle?

A. The frame of a vehicle-mounted generator isn't required to be grounded (connected to the earth) if [250.34(B)]:

  1. The generator frame is bonded to the vehicle frame,
  2. The generator only supplies equipment or receptacles mounted on the vehicle or generator, and
  3. The metal parts of the generator and the receptacle grounding terminal are connected to the generator frame.
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