On Thu, 20 Nov 2003 14:19:09 +0000, The Natural Philosopher wrote:
<snipped some real dangerous and ill-informed rubbish>
Lead sheathed cables used pbj (poly-butyl-jute) for insulation. The
stuff deriorates over time, and becomes brittle and liable to cracking.
Possible loose connections in switches or at ceiling roses, junction
boxes, etc, can generate localised heat spots, which in turn tend to
make the pbj turn powdery and crumbly, leading to a break-down of the
insulation. *Any* movement of the cables should be considered an
absolute no-no. I know of two or three house fires that were directly
attributed to old lead-sheathed wiring. It's a complete folly to rely on
modern protection devices to isolate any possible faults. That's too
late when your house is burning down coz a fire has started before the
The cables are well-past their life expectancy and should be replaced as
soon as posible.