Splice in a bare copper ground wire
I know that it is not OK to join hot or neutral wires with a wire nut outside of a juction or switch box. But how about a bare copper ground wire using a crimp connector?
I've got a wire in my wall that a previous owner did just that. He had moved a switch box in the wall and had enough of the black and white wire to make it into the relocated box, but for some reason the ground came up short. So he just added some bare copper wire to the end of the short ground lead and this has caused a splice in the wall outside the switch box.
Any opinions would be welcome.