NY wrote:


Here in the UK, if the plug is rated for 13A, that means it is safe to run a
3-bar electric fire (3 kW, which is 12.5 A at 240 V) through that plug and
socket without it overheating to dangerous levels (melting of insulation) no
matter how long it is left running.

I dont believe that this is the case. Real life experience indicates that
they DO frequently overheat with 3kW continuous loads

Electric vehicle €œGranny chargers€� designed to plug into a standard 13 amp
socket are all de-rated to 10 amps for this reason.

Tim
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