Bill Wright wrote:

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

The attribution is wrong, that was a reply to me. But why assume it
isn't in an airless place, since cables often travel in conduit,
trunking, behind insulation or under plaster? And sometimes with many
similarly loaded cables.


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Roger Hayter