Announcement

Collapse
No announcement yet.

Transformer Grounding

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Transformer Grounding

    This is actually embarrassing that I'm asking this, but I can't seem to find the right clauses to back it up... Major brain fart day!

    At an industrial site, we have a 600V, 3ph, 3w outdoor panel feeding over to a little temporary 600-120/208V transformer... there's a buried ground electrode around the 600V panel, but nothing at the temporary transformer location. We are running Teck cable (w/ bond wire) from the big panel to the little transformer and I can't for the life of me recall if we need to run a separate ground wire from the buried electrode at the panel to the little transformer Xo (as opposed to using the bond wire in the teck cable). I mean, I'm pretty sure we do, but I can't find the right backup info??

    Thanks!

    #2
    I moved this from the Engineering forum to here because it is likely more related to CEC issues.
    __________________________________________________ ____________________________
    Many people are shocked when they discover I am not a good electrician...

    I'm in California, ergo I am still stuck on the 2014 NEC... We'll get around to the 2017 code in around 2021.

    Comment


      #3
      Originally posted by Bigjabe View Post
      This is actually embarrassing that I'm asking this, but I can't seem to find the right clauses to back it up... Major brain fart day!

      At an industrial site, we have a 600V, 3ph, 3w outdoor panel feeding over to a little temporary 600-120/208V transformer... there's a buried ground electrode around the 600V panel, but nothing at the temporary transformer location. We are running Teck cable (w/ bond wire) from the big panel to the little transformer and I can't for the life of me recall if we need to run a separate ground wire from the buried electrode at the panel to the little transformer Xo (as opposed to using the bond wire in the teck cable). I mean, I'm pretty sure we do, but I can't find the right backup info??

      Thanks!
      If the bond wire in the teck feeding the primary of the transformer is large enough to also be the ground for the secondary(#6awg),it can be used as per 2018 code. 10-212(2) and there is a good diagram in appendix B (diagram B 10-11) explaining it.
      Last edited by Eddy_Current; 03-15-19, 09:58 PM.

      Comment

      Working...
      X