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    Rigid Coupling

    Is a compression coupling below the roofline,using GRC conduit, properly supported, legal for a service entrance mast?
    Tom

    " And all the science I don't understand, it's just my job five days a week "

    #2
    IMO it's a judgement call depending on how the section above the coupling is supported. You could always add a guy wire to increase the mechanical strength of the mast.

    230.28 Service Masts as Supports. Only power service-drop or overhead service conductors shall be permitted to
    be attached to a service mast. Service masts used for the support of service-drop or overhead service conductors
    shall be installed in accordance with 230.28(A) and (B).
    (A) Strength. The service mast shall be of adequate strength or be supported by braces or guys to withstand
    safely the strain imposed by the service-drop or overhead service conductors. Hubs intended for use with a conduit
    that serves as a service mast shall be identified for use with service-entrance equipment.
    (B) Attachment. Service-drop or overhead service conductors shall not be attached to a service mast between a
    weatherhead or the end of the conduit and a coupling, where the coupling is located above the last point of securement to the building or other structure or is located above the building or other structure.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

    Comment


      #3
      Make sure it's raintight.
      Ethan Brush - East West Electric. NY, WA. MA

      "You can't generalize"

      Comment


        #4
        The riser is about 15' with 3' extending above the roofline. the coupling would be 5' above the meter socket. R/T coupling for sure.
        Tom

        " And all the science I don't understand, it's just my job five days a week "

        Comment


          #5
          Originally posted by A/A Fuel GTX View Post
          The riser is about 15' with 3' extending above the roofline. the coupling would be 5' above the meter socket. R/T coupling for sure.
          That would be fine for using the mast to support the drop.
          Rob

          Moderator

          All responses based on the 2014 NEC unless otherwise noted

          Comment


            #6
            Originally posted by electrofelon View Post
            Make sure it's raintight.


            Threaded couplings aren't "raintight", but let's not give manufacturers more stupid ideas to turn into listing/code issues.
            I live for today, I'm just a day behind.

            Comment


              #7
              Originally posted by kwired View Post


              Threaded couplings aren't "raintight", but let's not give manufacturers more stupid ideas to turn into listing/code issues.
              I agree it is silly but that is what the code says. I mentioned this because raintight compression rigid couplings are kinda hard to find. Most of them are only concrete tight.
              Ethan Brush - East West Electric. NY, WA. MA

              "You can't generalize"

              Comment

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