Chipmunk,
Stove elements are like Pyrotenax, not sure if the outer sheath is actually copper, but I do know that kettle (jug) elements sure are.
I would also agree with kiwi's comments, Pyro, will not tolerate being bent more than twice, unless of course, it is a very gentle bend.
Stress the outer sheath too much and it will crack.
One other little system that we imported from England, that I'm told wasn't good enough for use there, so it was sent over here, was the Dreaded MIAS(Mineral Insulated Alloy Sheathed).
Bend once or start again, it came in huge coils and you had to warm it with a propane torch set on low, to even to get it to un-roll.
That was all torn out by the late 90's, for those that actually were cheap enough to install it in the first place.
Apparently this "cable" would never even blow an HRC fuse, it would blow the cable sheath apart instead. [Linked Image]