I have a metal junction box but I'm currently using as a pass-thru for the wires running through it. It's the incoming box from outdoor underground conduit burial. My ground wire is just barely long enough so I'm afraid to splice it and reconnect it using a wire nut so the box can be grounded. Is there a way to splice it securely so I don't have to worry about the splice coming loose? If not, can I just run a 4th wire from the jbox to the panel and consider it grounded safely?
I do have the hot wire in the box with a wirenut right now because it was a couple inches short so I had to cut it and extend it.