Those Raychem cables look much more sophisticated than the series resistive loop cables We have (Dad's house - He cut some with a hatchet chopping ice on the roof
!!) They can be cut anywhere and I assume that the end just needs to be sealed somehow because the current flows across from wire to wire and is self regulating by temperature. They look like they'll save $$ with that feature instead of being Full on all the time like the old ones. So, Maybe we'll just get some new generation Raychems to replace instead of repairing old ones.
I agree with your comments, as a side note there's no UL mark on the packaging either.
Also, that's a bit confusing to me why Art 426 would refer to 422 like that.