Three 3kW handwashers

[JohnW2]

It wouldn't BE a problem but the standard is quoting for an hour, is it not?

It is, but you've moved the goalpposts as compared with the test in the Standard. That test (presumably) has a starting point of zero current/cold and (presumably) says that if that current is raised from zero to 13.5A, then the temperature one hour later 'must not be excessive'. If the 'starting point' was not zero/cold, the pass criteria would presumably be different - although there's no telling in what way.

I've just realised that I was thinking of the other thread, and the 13.5A/1 hour test for 10A switches. However, the generality of what I said still applies to cables. I presume that the tests they do (to establish maximum permissible 1-hour and conntinuous currents) assume a start at zero current with acbles at ambient temperature.

Kind Regards, John