Just did a remodel and have been wiring up plugs and switches. Noticed in a couple of the receptacle boxes there are nicked THHNWires. In one case, a Neutral and in the other case a Hot. In both scenerios, it is nicked about
3" or so after it enters to box. One one case it is conduit and conceivable could be repulled. Pain though. In the other it is Romex and cannot be replaced within ripping a wall open. I could just cut it real short and pigtail with a wire nut but it makes me cry to cut them so short. I think I know the answer, but can I use heat shrink or pro grade tape and cover the nicks. BTW, bare metal is exposed in both nicks. Is there a permanent splice that is more reliable than a wirenut? I think this happened because they guy was using undersized boxes for homeruns and it is very crowded.