On 06/11/2016 09:03, Roger Hayter wrote:

Unless you have an installation method that results in a big de-rating
on the cable, 1mm^2 is usually more than adequately protected by a B10
MCB. So I would not worry.

OK. Suppose a load of 1kW, and 3kW. How hot would 1mm cable get in each
case, assuming it wasn't in an airless place?

Bill