I'm building an Electrical Brewery so I need to protect myself from any mishaps. The current setup has the Neutral bar and the ground bar common. I believe to properly wire a GFCI Breaker the Neutral bar must be isolated from the ground bar and enclosure. Where I currently have all the neutral/white wires I don't think i can isolate that bar. So I'll need to isolate the small ground bar in the upper right corner and run the white wires to that and then run all the bare copper wires where the white wires are now. Please advise if i'm correct or what else I need to do. I've attached pictures of the sub-panel, GFCI and the isolation kit. The actual GFCI breaker I'm installing is a DP 20A HOM220GFI and will replace the DP 20A std breaker on the right. Edit, crap I can't be right with above. The neutral wire from my feeder is on the neutral bar now. How do I isolate the neutral bar? if i put the grounds there i can't accomplish what I want. I don't know how to set up this panel.

When using plastic junction boxes there's no real need to ground them. So what do I do with the ground wire? The Outlet I'm concerned with doesn't work. Here's how I wired it. 12-3 W/Ground from panel. In the plastic junction box I have the red wire to one side and the black wire to the other side of the 20A receptacle. I joined the bare ground and the white neutral and took one common wire to the green screw on the receptacle. Was that wrong? I sent another set of wires down line to another receptacle about 12 feet away and that one functions fine. I thought I wired them the same. I'm finally debugging this one that doesn't work because I'm doing another project and I figured I'd fix this one now. After opening it up everything looks good. I don't know what's wrong. Edit, I just went and powered the panel and my newly installed GFCI 240v 20A breaker kicks out as soon as I energize it.