I have a fair quantity of mains cable, and would like to remove all the
insulation without damaging the cable itself, so fire is not an option.

The cable is ordinary grey sheathed T&E. Removing the earth is easy,
and splits the outer sheath at the same time. Removing the insulation
from the remaining black and red cables is a pain. Using a knife risks
nicking the cable and creating a weak point. Using strippers an inch at
a time takes forever, and the cable is around 70 feet so 140 feet to
strip.

Bright ideas?
--
Graeme