I tried one last night, ended up looping it over a hook screwed into the wall, put my foot in the loop & pushed down, then I run the boxcutter knife down the cables side until I had at least 98% of it with a cut thru its side.
Then I peeled the wire out of the insulation.
Not easy, not hard, not the best way to do it...

I found a 100% plastic handled boxcutter & tried something with it.
I figured that the boxcutter with a groove up its face, would sit onto the copper cable & I'd be able to slide the knife down the cable, with the tip of the blade sticking out and I'd be able to slice thru the insulation.



I got a flat file (That I found that day) with a rounded side. I retracted the blade of the boxcutter & filed a groove up thru the slot where the blade comes out.
When I looked at the groove the first thing I thought was 'Camel toe'.
Then I slid the blade out a bit.... Ah yeah, most men will know what I was thinking then....

It worked OK, would work well on the right dia cable.