Testing carbon fibre heating wire. (with flame test)

This is a very unusual heating wire that uses a core of very fine carbon fibre strands encased in a soft rubber sleeve. It has a resistance of about 33 ohms per metre (about 10 ohms a foot) so suitable lengths can be directly powered from the mains supply. Shorter lengths like 1m (40") can be run directly from 12V and will dissipate about 4-5W of heat per metre along the length of the cable.
This material seems to be designed for underfloor heating purposes. Probably laid in a pattern and then screeded over to protect it.
I was trying to work out how to connect it and the only indication I've come across is that you strip it to expose the carbon fibres and then fold them back on the insulation before ramming it into the end of a copper tube. In one image it showed it being crimped too.
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