User Tag List

Results 1 to 8 of 8

Thread: Grounding remote panel

  1. #1
    Join Date
    Dec 2003
    Location
    San Francisco Bay Area
    Posts
    567
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Grounding remote panel

    I'm bidding a job that will require setting a panel in a parking lot. The panel will feed some receptacles, lighting etc. I know if this was a remote building, it would have to be grounded at the structure. I'm not sure about the condition where it is in a parking lot. Any references? Thank you.

  2. #2
    Join Date
    Nov 2003
    Location
    The incredible, yet very expensive, Hudson Valley, NY NEC 2014
    Posts
    1,875
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My understanding is if you put a panel on a post the post is considered the "structure", therefore.....separate structure and installed as such.
    Mike, Dutchess County, NY

  3. #3
    Join Date
    Mar 2003
    Location
    Vermont
    Posts
    2,618
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    an interesting '17 change fits here>

    Structure. That which is built or constructed, other than
    equipment. (CMP-1)
    ~RJ~

  4. #4
    Join Date
    Dec 2006
    Location
    Eastern Oregon
    Posts
    3,820
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    We would drive a couple of rods and be done with it.

  5. #5
    Join Date
    Aug 2004
    Location
    Northern illinois
    Posts
    17,453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Cow View Post
    We would drive a couple of rods and be done with it.
    often these things are out in a parking lot though and you are required to have a certain amount of distance like 6 feet between them and that is not always real easy to do in a parking lot
    Bob

  6. #6
    Join Date
    Dec 2006
    Location
    Eastern Oregon
    Posts
    3,820
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by petersonra View Post
    often these things are out in a parking lot though and you are required to have a certain amount of distance like 6 feet between them and that is not always real easy to do in a parking lot
    I don't think the code cares.

    If it was fed underground, it stands to reason you could drive them in the ditch. If overhead, you're going to have to get creative.

  7. #7
    Join Date
    Dec 2003
    Location
    San Francisco Bay Area
    Posts
    567
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the input. It isn't a big deal to run a couple of rods, I just wanted to understand the code, which I think has been answered. I confess I don't really understand why a ground rod is helpful in this situation. The panel is already grounded with the ground wire that feeds the panel. This has always felt like a ground-loop to me which creates problems of its own. The impedance of the rods will be higher than the impedance of the ground wire running back to the main panel. If the concern is the ground wire from the main panel becoming disconnected, then that concern would be true of all panels, not just those in an outbuilding.

  8. #8
    Join Date
    May 2005
    Location
    Richmond, Virginia
    Posts
    25,764
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Think of it as making sure that the earth around the building is at the same potential as the electrical ground.
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •