Induction hob plus oven wiring - rating?

[les24preludes]

Hi guys, I need to have an induction hob and oven connected up. Units are:
Hob: AEG HK654400XB Induction hob - HK654400XB | AEG - https://www.aeg.co.uk/kitchen/cooking/hobs/induction-hob/hk654400xb2/
Oven: Miele H2561BP Miele Ovens | H 2561 BP Oven - https://www.miele.co.uk/domestic/ovens-1451.htm?mat=10116060&name=H_2561_BP

There is an existing cooker circuit with isolator. Each wire, pos and neg, inside the isolator has an outer diameter including PVC cover of 5mm. So I need to know:
1. What the existing wiring is in cable size/capacity
2. If this is enough allowing for diversity
3. Or do I need a new feed from the fuse box for the induction hob, which seems the more greedy of the two.
Can someone fill me in on where to go here? I do know some basic DIY electronics so would understand ratings.

 

[telectrix]

generally, the existing circuit would be 6mm ( cross section, not diameter)and that is fine for up to 15kW (total rating) of cooking appliances. what size MCB is protecting the cable? best advice is to get a local spark to check and test the circuit and then advise on whether it will cope .

 

[les24preludes]

The cooker fuse for the existing circuit is 45A. Not sure if the cable is 6mm or 10mm. Can anyone give me a definitive answer based on the fact that the OD of each single wire is 5mm including PVC cover? What's that?

 

[westward10]

Is the bare earth solid or stranded.

 

[Christopher Bernard]

You could always measure the diameter if you're really that unsure.

10mm² ((√(10/π)) x 2) = 3.56mm diameter.
6mm² ((√(6/π))x 2) = 2.76mm diameter.
4mm² ((√(4/π))x 2) = 2.25mm diameter.

 

[Taylortwocities]

More tricky than that. The cable will be composed of 7 strands, so measure a strand, apply the formula and multiply by 7 to get the measured csa of the cable.
Hope you have a micrometer!
Not so easy, this electrickery stuff, is it?

 

[westward10]

Only this forum can blow things totally out of proportion.

 

[les24preludes]

Sounds like 6mm. Looking up Farnell specs, 6mm total OD is 4.85mm, rated 48A. Fuse is 45A That sounds close. 10mm is OD 6.3mm which is more than the 5mm I measured.

Using Ohm's law, 230v at 48A is 11kW which is what's required in total. Looks borderline but not impossible.

Earth is insulated yellow/green. Wiring was put in in the 1980s.

 

[telectrix]

is it a 45A fuse or a MCB? or are you going by the isolator rating?

 

[les24preludes]

It's a simple 1980s fuse box. 220x170mm. Space for 6 fuses and master on/off on RH. Cooker circuit has a 45A fuse.
Isolator has an on/off switch and a red light. 150mm by 90mm

 

[westward10]

Does this cable have a single solid earth or a stranded earth.

 

[les24preludes]

Looks like it's stranded like the pos and neg, with green/yellow PVC sheath.

 

[Taylortwocities]

I do know some basic DIY electronics so would understand ratings.

like the pos and neg

Les, please get someone on site who knows how electricity works.

 

[les24preludes]

Les, please get someone on site who knows how electricity works.

What's your point here - are you referring to me or what?

 

[telectrix]

he's basically saying that you are out of your depth and should seek the services of an electrician.