"The Medway Handyman" wrote in message
...
Am I right in assuming that when T + E cable is referred to as 2.5mm that
is the diameter of the bare conductor?

No. It is the cross-sectional area. Single strand 2.5mm^2 conductors will be
about 1.8mm diameter.

Is there a chart anywhere that gives the outside dimensions including all
the insulation?

The cable manufacturers used to do data books giving that information, but I
usually just get a bit and measure it, if I need to know.

Colin Bignell.