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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?
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  • 0
    Induction hobs are quite 'weird' compared to traditional resistance heating. The average current is much lower, but the RF generators need filters that give a lot of earth leakage, so perhaps   budget for its own RCBO or RCD or at least have an escape plan if it is needed.


    I too would be happier to go up a cable size for expansion - partly because I'm unsure how good the old style calcs are on the newer hobs, and also  it may be that an oven of some sort is added at some point, that may actually need more than the hob by the sound of it.

    What do the makers instructions say - or what cable does it come with ?

    Mike
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  • 0
    Induction hobs are quite 'weird' compared to traditional resistance heating. The average current is much lower, but the RF generators need filters that give a lot of earth leakage, so perhaps   budget for its own RCBO or RCD or at least have an escape plan if it is needed.


    I too would be happier to go up a cable size for expansion - partly because I'm unsure how good the old style calcs are on the newer hobs, and also  it may be that an oven of some sort is added at some point, that may actually need more than the hob by the sound of it.

    What do the makers instructions say - or what cable does it come with ?

    Mike
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