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Thread: EMT Ground Hub??

  1. #1
    Join Date
    Mar 2007
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    EMT Ground Hub??

    So I have never seen this and no luck finding it…when using EMT as a raceway for mechanical protection of a supplemental bonding conductor for ex. ½”C with a #6AWG ground I was looking to see if I could find a ground hub / choke to be used at each end of the conduit however everything I have found [oz/gedney, etc.] the hubs are threaded. Is it possible, common acceptable [UL?] to thread EMT, I could not find a similar product with set screw type connection? Any assistance is appreciated…

  2. #2
    Join Date
    Feb 2003
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    Fl
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    Just use EMT connectors and then the hubs.




    Roger
    Moderator

  3. #3
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    Jul 2003
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    Quote Originally Posted by Mike01 View Post
    So I have never seen this and no luck finding it…when using EMT as a raceway for mechanical protection of a supplemental bonding conductor for ex. ½”C with a #6AWG ground I was looking to see if I could find a ground hub / choke to be used at each end of the conduit however everything I have found [oz/gedney, etc.] the hubs are threaded. Is it possible, common acceptable [UL?] to thread EMT, I could not find a similar product with set screw type connection? Any assistance is appreciated…
    You cannot thread EMT. You can do what Roger suggested but threading the connector into the hub is a technical violation. Like Roger for me it isn't a problem.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  4. #4
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    Feb 2003
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    Quote Originally Posted by Mike01 View Post
    So I have never seen this and no luck finding it…when using EMT as a raceway for mechanical protection of a supplemental bonding conductor for ex. ½”C with a #6AWG ground I was looking to see if I could find a ground hub / choke to be used at each end of the conduit however everything I have found [oz/gedney, etc.] the hubs are threaded. Is it possible, common acceptable [UL?] to thread EMT, I could not find a similar product with set screw type connection? Any assistance is appreciated…
    I'm curious, is there a reason for you to not use a half inch bonding bushing on the threads of a set screw EMT connector?

    Another Al in Minnesota

  5. #5
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    Quote Originally Posted by al hildenbrand View Post
    I'm curious, is there a reason for you to not use a half inch bonding bushing on the threads of a set screw EMT connector?

    The reason it was done in the photo was due the design engineer wanting more expensive components.

    Roger
    Moderator

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