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Yeah, in a further trawl of the internet I learned about Cooker circuit diversity (https://www.tlc-direct.co.uk/Book/6.5.2.htm#:~:text=The{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20diversity{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20applicable{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20to{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20the,unit{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20includes{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20a{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20socket{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}20outlet.)
This has allowed me to calculate the current and confirm that a 32A breaker and 6mm cable are good for a 6 to 7kw replacement.
Now I just have to decide ceramic or induction and find a good second hand one as the whole kitchen will probably be replaced in a few years.
Thanks for the responses.That was why I wanted to know the rating of the hob, as the cooker and the hob share the same 32A circuit (plus the socket outlet of the cooker panel), so the maximum load must not be more than 230V x 32A = 7.4 kW. Many 60cm 4 ring ceramic hobs are rated at over 6kW so that doesn’t leave much for the cooker and a socket load, which could well be a 2.4kW kettle.
I know it’s unlikely that all items are operated at maximum power at the same time so do I accept this and not worry too much about the theoretical maximum current draw and the possibility of the breaker tripping occasionally, do I need to find a lower rated hob or am I missing a trick in my logic?
