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Manufacterer's advice/instructions

whjohnson
Been asked to connect up a used rangemaster all-electric cooker. No rating plate but model name is 'classic 90'. It has an induction hob.

Existing cable is 6.00mm on a 32A mcb.

Phoned the manufacturer who said it would be fine, since diversity could be applied but we would have to fit a cooker switch without a built in 13a socket and uprate the mcb to 40A.

I am a little troubled to say the least.

Comments welcome.
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    John Peckham:

    `You cannot apply diversity to a single piece of equipment for sizing circuit protection and cable sizing. Diversity can be applied to individual items of equipment when considering the maximum load on a distribution circuit or an installation.


    The cable and the circuit protection should be rated for the "Plated" load or the manufacturers instructions.




    This gives rise to a bit of an anomaly....

    If I have a cooker with a 7.5kW four plate hob and a 3kW double oven/grill I can't apply diversity.

    If I have a fitted kitchen with a built-in 3kW double oven/grill and a separate 7.5kW four plate hob then I can apply diversity.

    They surely can't both be right.

    Alasdair

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  • 0

    John Peckham:

    `You cannot apply diversity to a single piece of equipment for sizing circuit protection and cable sizing. Diversity can be applied to individual items of equipment when considering the maximum load on a distribution circuit or an installation.


    The cable and the circuit protection should be rated for the "Plated" load or the manufacturers instructions.




    This gives rise to a bit of an anomaly....

    If I have a cooker with a 7.5kW four plate hob and a 3kW double oven/grill I can't apply diversity.

    If I have a fitted kitchen with a built-in 3kW double oven/grill and a separate 7.5kW four plate hob then I can apply diversity.

    They surely can't both be right.

    Alasdair

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