On Thu, 13 Jan 2011 16:07:22 GMT, wrote:

Some PO drop wire was steel cored, not sure what it's coated with, just
it is very stiff. I've got a sample somewhere in the loft.

Dropwire No.10 has steel strainers (plain yellow insulation IIRC) but
the pairs are just copper. The stiffness comes more from the jolly
tough jacket than the cores.

--
Cheers
Dave.