I was replacing some drywall and noticed the wiring underneath has a couple of surface tears. House is from the sixties, but has been rewired with new Romex, except this circuit. Wire seems to be old type of Romex (cloth covered) and has the marking "HATFLEX NM 14/2". Only the cloth is partially teared-up.
Should I be worried about this? I was considering putting some electrical tape over the damaged sections. Is this ok? What other alternatives do I have?