Carbon fiber is usually (always?) electrically conductive. I once
placed a carbon fiber tube across the output terminals of a
high-current 12V power supply, thinking that I would feel the tube get
warm. Instead, it burst into flames after glowing for about 1 second.
If I remember correctly, the resistance turned out to be around 1 ohm
per inch of tube length (tube was about 1/4 inch diameter with about
1/16 inch thick wall).

Sean


On Sat, Dec 29, 2012 at 7:01 PM, John Gardner <goflo3@gmail.com> wrote:
> Be interesting to know the resistance characteristics
> of the carbon fibre liner...
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