Adding a dual appliance outlet plate to cooker circuit

[Eaglesphil]

Hi,

I want to add a 32a induction hob and 13a oven to my cooker circuit. I was going to make the current single outlet dual and then upgrade the MCB from 32a to 45a.

See photos of current setup.

Does this sound doable?

Thanks

Phil

 

[DPG]

Is the circuit suitable to be upgraded to 45A (cable type, length, installation method, insulation etc.) ?

 

[Avo Mk8]

I thought those Memera 2000 ALB MCB's only came in 40A and 50A (assuming you could find one!), which might have a bearing on the adequacy of the cable in situ.
Others will know better than I, and what might fit!!
Might be safer to leave existing cable as is and use for the hob alone, and run an additional radial for the oven?

 

[SJD]

It is hard to see, but the existing cable into the outlet in the photo doesn't look likely to be rated at 45A.

In any case, do you actually need 45A, that is probably only a worst case current if you switched everything on max at the same time? In practice the maximum is likely to be a lot lower.

 

[Eaglesphil]

It is hard to see, but the existing cable into the outlet in the photo doesn't look likely to be rated at 45A.

In any case, do you actually need 45A, that is probably only a worst case current if you switched everything on max at the same time? In practice the maximum is likely to be a lot lower.

I have just been looking at the specs of the induction hob and oven. The hob has a max power output of 7kw and the oven is 2.3kw so a potential max of 9.3kw but in reality it would never reach that.

Do you think the 32a breaker would be sufficient for this?

 

[Eaglesphil]

I thought those Memera 2000 ALB MCB's only came in 40A and 50A (assuming you could find one!), which might have a bearing on the adequacy of the cable in situ.
Others will know better than I, and what might fit!!
Might be safer to leave existing cable as is and use for the hob alone, and run an additional radial for the oven?

Could you run a radial off the cooker circuit or would it have to come from the kitchen ring?

 

[loz2754]

If you were treat the hob and oven as a single cooking appliance and apply the guidance on allowances for diversity (meaning we can rely on the probability that not all the hot plates are on all the time as well as the oven, and each element will be cycling on and off on their thermostats), then we get the following:

Diversity for a cooking appliance is the first 10 amps, then 30% of the remainder, plus 5 amps if there's a socket on the cooker switch.
This works out at 32 + 13 = 45 amps total before applying diversity.
So 10 amps plus 30% of 35 amps plus 5 amps. Which amounts to 25.5 amps.
Therefore you are within the maximum of 32 amps allowed by your current circuit.

 

[Eaglesphil]

If you were treat the hob and oven as a single cooking appliance and apply the guidance on allowances for diversity (meaning we can rely on the probability that not all the hot plates are on all the time as well as the oven, and each element will be cycling on and off on their thermostats), then we get the following:

Diversity for a cooking appliance is the first 10 amps, then 30% of the remainder, plus 5 amps if there's a socket on the cooker switch.
This works out at 32 + 13 = 45 amps total before applying diversity.
So 10 amps plus 30% of 35 amps plus 5 amps. Which amounts to 25.5 amps.
Therefore you are within the maximum of 32 amps allowed by your current circuit.

Thank you, that tells me everything I need to know