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    Ground Riser

    Anyone know what you would use to tap off the # 500 vertical grounding conductor to go to the ground bar? T Tap?
    Attached Files

    #2
    Mechanical or crimp connection?
    Rob

    Moderator

    All responses based on the 2017 NEC unless otherwise noted

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      #3
      something like this maybe?

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      Attached Files
      Bob

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        #4
        Yes that is what I was thinking for a crimp connection. For a mechanical connection I would use a IPC type tap.

        Rob

        Moderator

        All responses based on the 2017 NEC unless otherwise noted

        Comment


          #5
          I like the compression tap.
          Related question, what type of conduit is the 500 kamil in?
          Moderator-Washington State
          Ancora Imparo

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            #6
            Originally posted by tom baker View Post
            I like the compression tap.
            Related question, what type of conduit is the 500 kcmil in?
            I'm guessing....EMT.
            Rob

            Moderator

            All responses based on the 2017 NEC unless otherwise noted

            Comment


              #7
              Originally posted by tom baker View Post
              I like the compression tap.
              Related question, what type of conduit is the 500 kamil in?
              EMT

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                #8
                Thank guys

                Comment


                  #9
                  If this is a GEC and the riser is EMT, the ends of the EMT need to be bonded to the 500 KCML See 250.68 (E), Since the dwg shows transformer I am pretty sure this is a GEC. You would be much better off using SCH 80 PVC for the conduit. Your bonding jumper for the ends of the EMT has to be 500 KCML. The size for the common grounding electrode conductor is not smaller than 3/0
                  250.30 (A)(6). At the end of that section is the requirements for the tap conductor connection. Not sure why 500 KCML is being used but there may be an engineering reason
                  Moderator-Washington State
                  Ancora Imparo

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                    #10
                    Originally posted by mstrlucky74 View Post
                    Anyone know what you would use to tap off the # 500 vertical grounding conductor to go to the ground bar? T Tap?
                    One other comment, grounding conductor is not a code term...we get confused on grounding and bonding as we use the incorrect terms...
                    Moderator-Washington State
                    Ancora Imparo

                    Comment


                      #11
                      You're correct, this is actually a common grounding riser under 250.30(A)(6). A grounding hub can be used on the EMT to bond it directly to the riser. Not sure why anyone would spec 500 kcmil when #3/0 is all that's required.
                      Rob

                      Moderator

                      All responses based on the 2017 NEC unless otherwise noted

                      Comment

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