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Thread: Disconnect Ground Lug Size for Tap's EGC

  1. #1
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    Disconnect Ground Lug Size for Tap's EGC

    I have a tap off of a 400 amp feeder that lands on a 200 amp fused disconnect. Based on the 400 amp upstream fuse I selected a #3 equipment ground from 250.122 for the tap. The ground lug listed on the 200 amp switch label only goes up to #4.

    What options are there? I would assume this comes up frequently with taps.

    and

    Would you:

    Ignore it?
    Use a larger lug (that's not spelled out on the label)?
    Use a different disconnect?

  2. #2
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    Ignore it if the #3 fits.
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

  3. #3
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    Just change the lug to the proper size.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

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