Adding panels, Can I add to the grounding ???

PhotowhitPhotowhit Solar Expert Posts: 4,202 ✭✭✭✭
So I picked up 4 cheap panels that meet the specs of my current panels. Will add the to the top of my array where I have left the supports extended.

I was wondering if I can use the clamp bolts to add the grounding wire to the existing wire? I have a bunch I have salvaged off telephone pole grounds, I guess this is cool, I think I've always seen them use 2 on each combining with some space in between.

While I'm up there any suggestions about checking the continuity of the other grounding wires to the frame work of the existing panels?
Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, ForkLift battery. Off grid for @13 of last 14 years. 1000 watts being added to current CC, @2700 watts to be added with an additional CC.

Comments

  • zonebluezoneblue Solar Expert Posts: 1,218 ✭✭✭✭
    The lug and nut bolt solution i started with started to look a bit unsavory after 2 years, so replaced them with these

    http://www.solar-electric.com/gbdbtsopagrl.html

    They are holding up ok for now. A squirt of noalox wouldnt go astray maybe...
    1.8kWp CSUN, 10kWh AGM, Midnite Classic 150, Outback VFX3024E,
    http://zoneblue.org/cms/page.php?view=off-grid-solar


  • vtmapsvtmaps Solar Expert Posts: 3,738 ✭✭✭✭
    Photowhit wrote: »
    I was wondering if I can use the clamp bolts to add the grounding wire to the existing wire?

    My limited understanding of NEC is that equipment grounding conductors must be continuous, or if there is a splice the spice must be irreversible.

    --vtMaps
    4 X 235watt Samsung, Midnite ePanel, Outback VFX3524 FM60 & mate, 4 Interstate L16, trimetric, Honda eu2000i
  • PhotowhitPhotowhit Solar Expert Posts: 4,202 ✭✭✭✭
    Zoneblue, That is what I use on the panels, I'm referring to adding the grounding to my existing grounding wire.

    vtmaps, I have 2 runs now from the panels joined with my run from my power center at the grounding rod, The power company uses these clamps on their power poles,
    Attachment not found.

    figured they would be fine, and I thought I had read something about continuous as well, maybe they consider these to make a continuous bond.
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, ForkLift battery. Off grid for @13 of last 14 years. 1000 watts being added to current CC, @2700 watts to be added with an additional CC.
  • BB.BB. Super Moderators Posts: 26,768 admin
    The continuous bond, as I understand, is to make sure that nobody can disconnect the safety ground wire by unscrewing a bolt/wire nut/etc.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • PhotowhitPhotowhit Solar Expert Posts: 4,202 ✭✭✭✭
    So do I need to do another continuous wire?

    What do I need to do at the grounding rod, restrict access to the clamp?
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, ForkLift battery. Off grid for @13 of last 14 years. 1000 watts being added to current CC, @2700 watts to be added with an additional CC.
  • Dave AngeliniDave Angelini Solar Expert Posts: 3,257 ✭✭✭✭
    BB. wrote: »
    The continuous bond, as I understand, is to make sure that nobody can disconnect the safety ground wire by unscrewing a bolt/wire nut/etc.

    -Bill


    True and very good to always keep in mind. Offgrid and high up on the array Photowit has an excellent item for making the connection. I doubt a school bus full of 7 year old's with tools will be stopping outside his array. I would verify resistance at the new connection to the GEC and rod at this time.
    "we go where power lines don't" Sierra Mountains near Mariposa/Yosemite CA
     http://members.sti.net/offgridsolar/
    E-mail offgridsolar@sti.net

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