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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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  • Former Community Member
    0 Former Community Member
    These forums are incredible, you guys blow my mind. I learn so much?

    Would you say 6mm T+E on a 40amp MCB is perhaps over the top? I really have no opinion. Especially now you’ve mentioned that the total load of 4 hobs on the go at once (even though that is highly unlikely) calculates to be 53amps...slightly different from the manufacturers 7.35kW (31.95amps) instructions. I kinda feel a bit out of my depth with making a decision if I’m honest. In one breath I’m 4mm on a 32amp MCB, then next it’s 6mm on a 40amp MCB!!!?
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  • Former Community Member
    0 Former Community Member
    These forums are incredible, you guys blow my mind. I learn so much?

    Would you say 6mm T+E on a 40amp MCB is perhaps over the top? I really have no opinion. Especially now you’ve mentioned that the total load of 4 hobs on the go at once (even though that is highly unlikely) calculates to be 53amps...slightly different from the manufacturers 7.35kW (31.95amps) instructions. I kinda feel a bit out of my depth with making a decision if I’m honest. In one breath I’m 4mm on a 32amp MCB, then next it’s 6mm on a 40amp MCB!!!?
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