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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?
Parents
  • Former Community Member
    0 Former Community Member
    If the 6mm T+E is connected via a cooker outlet plate which is most likely rated at 45amps, then from the outlet plate to the Hob in 6mm H07BN4-F cable, then in essence, it remains as 1 length of cable. Don’t forget this circuit is 30mA RCD protected too, so there is another for of protection. From some of the research I have done and other comments I have read, installing a slightly larger cable ‘could’ (not saying it will as technology these days seems to make things smaller and use less power), allow for any future appliances.


    plus you never know...one day there may very well be a George Forman, sandwich toaster, microwave slow cooker on the market. It would give you more room in your kitchen and eliminate the need for consumer unit circuits??!?
Reply
  • Former Community Member
    0 Former Community Member
    If the 6mm T+E is connected via a cooker outlet plate which is most likely rated at 45amps, then from the outlet plate to the Hob in 6mm H07BN4-F cable, then in essence, it remains as 1 length of cable. Don’t forget this circuit is 30mA RCD protected too, so there is another for of protection. From some of the research I have done and other comments I have read, installing a slightly larger cable ‘could’ (not saying it will as technology these days seems to make things smaller and use less power), allow for any future appliances.


    plus you never know...one day there may very well be a George Forman, sandwich toaster, microwave slow cooker on the market. It would give you more room in your kitchen and eliminate the need for consumer unit circuits??!?
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