User Tag List

Results 1 to 10 of 10

Thread: Running PV wire from ground mount to inverter

  1. #1
    Join Date
    Mar 2005
    Location
    MN
    Posts
    106
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Running PV wire from ground mount to inverter

    I've got an inspector who's being difficult. On our ground mount setup we're running PV wire directly from the final Amphenol/MC 4 connection into the inverter. I installed 1" EMT to sleeve the wires into a Solar Edge 10k inverter. There's a #6 ground and I have bond bushings on each end of the EMT and I duct sealed the end as well. Mr inspector says that's not kosher, I need to separately bush wire, i.e. a weather head. He's stating 690.31(C)(1) which takes you to 334.30 and 338.10(B)(4)(b) which takes you to Part I of article 225. Never been told my way (hundreds of installs) is wrong before, until this guy, which doesn't mean he's wrong just that I don't like him.... Thoughts?

  2. #2
    Join Date
    May 2011
    Posts
    4,767
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    690.31(C)(1) does not refer to those sections. The connection is flimsy at best, in my opinion. And where does 225 even say when a weatherhead is required?

  3. #3
    Join Date
    Mar 2005
    Location
    MN
    Posts
    106
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    690.31(C)(1) says single conductors can be exposed and shall follow 338.10(B)(4)(b) (treat them like SE cable) and 334.30 (treat them like NM cable which doesn't apply here). 338.10(B)(4)(b) says when cable is installed exterior then follow part I of 225. 225.11 says go to 230.54 (I forgot to add this, sorry) finally 230.54(E) says it needs bushed openings. Hope that clears things up

  4. #4
    Join Date
    May 2011
    Posts
    4,767
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sorry, I was looking at the 2014 NEC. Forgot that was updated.

    I still debate whether your wiring is 'entering a building or structure'. Is the inverter on the ground mount rack?

  5. #5
    Join Date
    Aug 2013
    Location
    New York, NY
    Posts
    517
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Use one of these:
    https://www.topaz-usa.com/emt-fittin...on-type-emt%2f

    And one of these:
    https://www.mcmaster.com/7807k47

    Problem solved.



    SceneryDriver

  6. #6
    Join Date
    Mar 2005
    Location
    MN
    Posts
    106
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by SceneryDriver View Post
    Use one of these:
    https://www.topaz-usa.com/emt-fittin...on-type-emt%2f

    And one of these:
    https://www.mcmaster.com/7807k47

    Problem solved.



    SceneryDriver
    I know what my options are, I don't want to change what's been installed already. And prove him wrong... Once again, one inspector says no and most others allow this set up. We will run a short piece of 1.25" PVC, 3-5', from one array to another all the time. EMT if it's longer. He's saying I need to put in a Heyco type fitting on 1.25" PVC that has 3 wires in it. Ridiculous IMO.
    Last edited by sketchy; 10-05-18 at 09:48 AM.

  7. #7
    Join Date
    Nov 2015
    Location
    CA, USA
    Posts
    706
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the inverter remote or next to/in the PV array?

  8. #8
    Join Date
    Mar 2005
    Location
    MN
    Posts
    106
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by pv_n00b View Post
    Is the inverter remote or next to/in the PV array?
    Yeah, mounted on strut which is secured to the array.

  9. #9
    Join Date
    Nov 2015
    Location
    CA, USA
    Posts
    706
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by sketchy View Post
    Yeah, mounted on strut which is secured to the array.
    Then as jaggedben said I question if 225.11 is applicable. If you are not careful going through this section of the code everything starts looking like a service entrance and transitioning from the array to the inverter is not a service entrance.

    That being said I have seen weird weather head installations occasionally in PV projects. Maybe to satisfy an AHJ rather than argue the point.

  10. #10
    Join Date
    May 2011
    Posts
    4,767
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are plenty of multi-hole strain reliefs that would provide the same features as a weatherhead. For what that's worth.

Posting Permissions

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