I'll take my utility knife and cut the sheath on the end about a 1/2", and then take the lineman pliers and pull the ground wire back. This splits the sheath, and I cut off the outer covering with the linemans. Works great for 12/2 and 14/4. 3 conductor is another story. I go through the same motions, being careful, because the ground wire turns around the other wires. As I pull back the ground, I have to turn the cable, to go with the turns.
