koen
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The manual for the cooker says that it can be wired to a 32A MCB, so the 10kW was probably a generous estimate. I used 6mm2 for the radial.
It's only the electrical oven that trips the RCD. The bbq or the grill in the gas oven happily switch off when reaching temperature. So far it's tripped every time with the electric oven, but I get shouted at for testing too much (every clock needs resetting in the house for instance). I will megger the cooker to make sure that the problem isn't with the insulation. Not sure if I can emulate the 'temperature reached' state very well though.
About the two ring mains, everything works fine when both MCBS are switched on and the RCD doesn't trip (this has been on for several months now). However I've been working in the kitchen, putting more sockets on one of the ring mains, and when I switch that MCB off, everything is fine (RCD stays on), however when I return a bit later to switch it back on, the RCD has tripped. And this happens every time too.
Thanks a lot for such an extended response already.
Koen.
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