Actually, yes.
Not for any code or physical-type reason, but since you can get to it, and
remember it now, and when you sell you can know you have fixed it right.
Split some other piece of scrap romex ('equivalent'), take the cover off,
carefully tape (3M '33') on a overlapping piece and forget it.

Tim S.

"AgaPSDIVER" wrote in message
...
Right at the top of an interior wall, inside the attice above the hole
going down thru the 2x4, a rodent, mouse or rat, had eaten away about
2 to 3 inches of romex covering. The "black and white" wires inside
did not have any damage.
I have stopped the mice from getting in the attic.
Since the metal wire is not exposed... can I just cover this area to
make
sure no future rodent gets to the wire???? or should this short
section be replaced.
thanks..