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Cable Diversity for Induction Hob

Former Community Member
Former Community Member
Hi all,


I have been tasked with wiring an induction hob, and I’m fairly new to install work on my own having just qualified myself and venturing out on my own. 


The Hob is rated at 7.35kW.

In my head, and applying the cable diversity factors-

7350w divided by 230v =31.95amps.

Take off the first 10amps =21.95amps

21.95x30% = 6.58amps

6.58amps+10amps =16.58amps Total.


Plus 5amps if there is a 13amp socket involved, which there isn’t in this case.


so with that in mind, I’d be fine wiring the circuit with reference method C (clipped direct) in 2.5mm T+E right??! Although saying that, my thoughts are to wire using 6mm T+E just in case future appliances vary! 

does this seem logical or should I just keep it as a 2.5mm circuit on a 20amp MCB.


any advice would be greatly appreciated. Let me know your thoughts?
  • It is likely that you cannot get the total load to be more than 7.35 kW or whatever because the electronics will be power limited by design. The overload case is therefore not possible, and faults will cause a short circuit, so again safe. It is sensible not to overrate the circuit, 32A is perfectly fine, just go with that. As I said it is not worth doing anything else. The power limit is necessary because if you choose a particularly lossy pan you could cause damage, for example perhaps heating a large ball bearing race for fitting! Electronics generally has to be made people tolerant, even if it does have "manufacturers instructions" which as usual are unhelpful. I wonder why they chose those unusual cable types, and why would they ever get hot with an induction hob, which does not get hot itself at all? Very curious. Good luck buying a couple of metres of either type. Perhaps they think you will dip the cable into the frying pan full of oil, very "continental" I'm sure!