"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?

Bugger me. You're one of the last people I'd expect to be asking that
question. Surely you've seen enough 2.5 T+E over the past few years, even if
you're not doing electrical bits, for the answer to be obvious?

(area, as Colin said, coz that's the relevant bit for resistance/current
carrying capacity)

cheers,
clive