Have a rental with UN grounded outlets. Panel box already upgraded.
So instead of trying to pull new romex into old metal boxes I was planning on just adding a ground wire. Any tips on this?
I was planning on just running a 12 gauge green wire ground to a double box I will put in the crawl space and then only have to fish a small ground wire to each box and then run each one back to double box and then wire nuts.
Do I need a junction box or could I just mount one of the short ground bar clamps to a joist and use that for about 20 connections