Bonding/grounding consideration for outdoor light on steel mast

Discussion in 'Electrical Forum discussion & Blog' started by ApexKeith, Feb 4, 2019.

  1. ApexKeith

    ApexKeith New Member

    Joined:
    Dec 1, 2018
    Location:
    North Carolina
    In the scenario described below, other than connecting the fixture and junction box to the circuit ground wire, are there any special considerations for lightning protection or outdoor application? Is GFCI protection required or advised for this light tapping into the septic alarm circuit?

    I am wanting to install a 50W LED outdoor flood light atop a rigid conduit mounted to a 4x4 wood post. The post is already securely anchored to the ground and rises to a height of 9'. I want to strap a 10-foot 3/4" rigid steel conduit to the 4x4 and have it extend about 3-4' above the post top. Power will enter a junction box at the bottom of the conduit where there will also be a timer switch. Power is already at the site via an underground 12-2 UF that is _not_ GFCI protected. There is an existing GFCI receptacle on the circuit but the plan is to not feed through that GFCI. Photo attached.

    I really appreciate all feedback.
     

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  2. Stuff

    Stuff Active Member

    Joined:
    Mar 7, 2013
    Location:
    Pennsylvania
    Shouldn't need GFCI. Only issue I see is of support. You have a max of 3' from luminary to last support. Connections need to be wrench tight.
    You can add ground rods if you like but not required.
     
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  4. ApexKeith

    ApexKeith New Member

    Joined:
    Dec 1, 2018
    Location:
    North Carolina
    Thanks for the reply, Stuff. I wasn't aware of the 3' limit, so that's good to know. I thought a ground rod near the base of the post would seem to provide extra insurance but didn't know if it was permissible, or would create some sort of undesirable ground loop.
     
  5. ApexKeith

    ApexKeith New Member

    Joined:
    Dec 1, 2018
    Location:
    North Carolina
    And now after further reading on auxiliary grounding electrodes, I won't give it another thought. Thanks again.
     
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