I'm running a subpanel (new) back to my main area (main is full) so running it off another subpanel that was already there (old).
I really only need this to feed my welder which is 240v only (plug is hot/hot/ground). I planned to run the new 40A circuit off my subpanel, with 8/2 wire so hot/hot/uninsulated ground. I was about to connect it to my old subpanel but realized there's no connected ground in this panel as far as I can tell, only hot/hot/neutral bar (no bonding screw I think, could the box possibly be considered grounded because it's attached to the pain panel with a metal connector?). So two main questions:
- Can I connect the uninsulated ground wire (in the picture) for running my new subpanel (240v only) to the neutral bar?
- If the old subpanel is running 120v circuits above, I assume this panel needs to be grounded? The issue with running a new ground from the old subpanel back to the main is that I have no more neutral/ground slots on the main panel!
Appreciate any advice