More volts doesnt generally reduce the current on a resistive heater. It will not magically stay at 2.99kw if its rated at 230v and you feed it 240v, it will simply draw more power.
No, that arithmetic is not correct..My new Neff oven is rated at 2.99kw and came with a plug. Germany assumes 230 volts mains and so the oven draws 13 amps over there. But here it is around 240v mains and so the oven will draw about 12.5 amps. My mains are always between 242-246 volts in fact, so well below the plug threshold.
So how do Hz affect it?
It can't be 2.99kW at both Voltages.
I think it safe to assume it is at 240V - otherwise it would be higher than specified; lower is not as important.
I think only a 'possibility' if you could find a shuttered version of such a socket - and really totally unnecessary (and exceptionally bulky/ugly in a domestic environment) given that this oven is not going to, even 'potentially', overload a 13A fuseI suppose another possibility, to avoid "potentially" overloading a 13A fuse, would be to use the IEC60309 16A plug and socket for the oven ...
Why not just use a normal Cooker Connection Unit - and socket.I suppose another possibility, to avoid "potentially" overloading a 13A fuse, would be to use the IEC60309 16A plug and socket for the oven,
I suppose another possibility, to avoid "potentially" overloading a 13A fuse, would be to use the IEC60309 16A plug and socket for the oven, connecting the socket to the incoming 6mm² cable from the dis. board (with a 2.5mm² spur to a 13A socket for the hob ignition). The flex to the cooker will be protected by the fact that the oven will not, in operation, draw more than its rated power, and in the event of a fault, the OPD is the dis. board will (should) disconnect before the flex to the oven becomes damaged.
... and, as I said, in a domestic environment the 16A socket should be shuttered.A 16A plug must be protected by a 16A MCB, so no that's not a possibility in the way that you describe it.
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