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Thread: Grounding dry type 120/208–277/480v transformers

  1. #1
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    Grounding dry type 120/208–277/480v transformers

    Have an inspector that says you must use grounding type bushing on conduits entering transformer.
    is this a new code requirement I’m not aware of because I have always used plastic bushings

  2. #2
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    Unless there are concentric or eccentric KO's and it's over 250 volts to ground they are not required. The GEC in a metal raceway is a different story.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

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