DIY Doctor

Converting a Gas Hob to an Induction Hob

Postby sfm23 » Thu Dec 19, 2019 1:07 pm

I have a gas hob that I'm looking to change for an 32A induction hob.
The current hob is wired into a 13A fused plug/socket behind the hob/drawer unit. This then goes to a CCU on the wall then straight to a 32A MCB, so it appears to have a dedicated feed from the CU.

There is no other fuse between the MCB and the 13A plug, so am I right in thinking that the wiring to the plug should be capable of 32A? It is a new build, so shouldn't have had too much dodgy wiring...
I've taken the socket cover off, and the wiring does look quite thick (subjective I know, sorry!).

I want to use a retailer's installation service, who specify that a CCU must be within 1.5m of the hob. It is, but I don't want them to start ripping up the wall around the CCU, if they can use the existing wiring to the 13A socket. (I'd be happy installing the hob electrics myself, but I need someone to cap the gas off...)

I'm hoping if I buy and have waiting for them something like https://www.screwfix.com/p/crabtree-cap ... erts/47806 then that'll be all they need to crimp the hob wires within the old 13A plug box?

Thanks!
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Postby ericmark » Fri Dec 20, 2019 12:24 am

For my sins I once worked for a cooker installation company, we worked as pairs and electrician and gas fitter, any excuse and the gas man would walk away, I complained I was not issued with the correct calibrated test gear and after two weeks decided I did want to sign off jobs without the test gear so left.

Oddly I have just fitted an induction hob in my own house, and in the main they need 4mm or 6mm cable, in some cases 10mm but cable was old red/black so hard to judge size, it was over 2.5mm but can't be 100% what size, however in real terms unlikely it will draw full 32A the RCBO will allow, and extremely unlikely it will ever draw the 45 amp the cooker in theory can draw.

Look at it this way, an induction hob uses less power than any other hob made, so it is unlikely to draw enough to cause an over load.

But what you are asking is will the electrician draw air through his teeth and say jobs worth? And all I can say is give him coffee and biscuits and cross your fingers, as one can always find a reason for not fitting it if you hunt enough.

Hope you have one with knobs on? The touch controls are too slow for induction hobs.
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