Electrician added cooker endpoint. Sizing right for hob and oven?

[dr_philipp]

Good morning,

I had an electrician in to add a single cooker endpoint for both an induction hob and an oven.
He used 10mm2 cable on a 40 amp fuse.

This all happened before we actually bought the appliances. Now we are planning to buy an induction hob rated at 11kw and an oven rated at 3.5kw. Both are supposed to be connected to the same endpoint.

My basic electrician knowledge from school time tells me:
Total max load: 14.5kw -> 60.4 amps on 240V.

Considering the diversity I commonly see in the internet:
60.4A - 10A = 50.4A
50.4A * 30% = 15.1A
15.1A + 10A = 25.1A

Which seems to be fine obviously.
However, I am not an electrician and to me the commonly seen diversity calculation seems quite generous in terms of deduction.
Should we size down the appliances we plan to buy?

Thank you
Philipp

 

[EFLImpudence]

You are correct and all and will be fine.

32A breaker and 4mm² T&E (method C) would have been adequate.


Method C is the cable clipped to surface or buried in masonry - not in thermal insulation.

 

[EFLImpudence]

Just to say -

10mm² T&E (method C) has a current carrying capacity of 64A so you are alright without diversity anyway.

 

[blup]

Good morning,

I had an electrician in to add a single cooker endpoint for both an induction hob and an oven.
He used 10mm2 cable on a 40 amp fuse.

This all happened before we actually bought the appliances. Now we are planning to buy an induction hob rated at 11kw and an oven rated at 3.5kw. Both are supposed to be connected to the same endpoint.

My basic electrician knowledge from school time tells me:
Total max load: 14.5kw -> 60.4 amps on 240V.

Considering the diversity I commonly see in the internet:
60.4A - 10A = 50.4A
50.4A * 30% = 15.1A
15.1A + 10A = 25.1A

Which seems to be fine obviously.
However, I am not an electrician and to me the commonly seen diversity calculation seems quite generous in terms of deduction.
Should we size down the appliances we plan to buy?

Thank you
Philipp

10mm seems a bit OTT but maybe he was covering himself because he didn’t know what you were going to install

 

[EFLImpudence]

10mm seems a bit OTT but maybe he was covering himself because he didn’t know what you were going to install

A flat, perhaps.

10mm² is often used as the main supply cable to whole flats.