Install new oven & induction hob to existing circuit

[Steve D]

Hi All. Just a little help I need connecting a electric oven and induction hob. The existing is a 32 amp MCB in the consumer unit. A 4m run of 6mm sq t&e cable from mcb going to a 45A cooker control switch. From here a 6mm sq t&e going into cooker connection unit. I have removed the old electric oven which was connected to the cooker connection unit with 6mm sq t&e cable. I want to connect a new 2.5kw oven and a 6.4kw induction hob. I have a 45 Amp Dual Appliance / Cooker Outlet Plate which will replace the existing cooker connection unit. Is it ok to connect both appliances to the new dual appliance connection unit so they are on the same circuit. If so then what size cable do I need to connect the oven to the connection unit. The hob already has a 5 core cable with the blue and grey cable joined together at the end and the black and brown also joined together. It looks like a 3 phase cable. Any help on this will be much appreciated.
Thanx

 

[GeorgeCooke]

same electrickery these days in spite of the EU(rinal) woth their stupid cable colours and phantom 230V.

Neither of those were anything to do with the EU, but I take your point.

 

[GeorgeCooke]

same electrickery these days in spite of the EU(rinal) woth their stupid cable colours and phantom 230V.

Neither of those were anything to do with the EU, but I take your point.

So I can do it even though the instructions say "This appliance must be connected directly to the mains using an omnipolar circuit breaker with a minimum opening of 3mm between contacts"

Indeed, the instructions are guidance not law.

 

[grumpyjohn01]

ovens and hobs up to a total rating of 15kW have been fine for the last 60 + years with both on a 32A MCB (6.0mm cable, ref. method withstanding). same loads, same electrickery these days in spite of the EU(rinal) woth their stupid cable colours and phantom 230V. why should it change?

Is this your personal rule of thumb? Based on I guess a circa 50% diversity factor for the 6mm/B32 combo?

 

[telectrix]

Is this your personal rule of thumb? Based on I guess a circa 50% diversity factor for the 6mm/B32 combo?

it's a well used formula... 10A + 30% of remainder

 

[grumpyjohn01]

it's a well used formula... 10A + 30% of remainder

Just had a look at OSG (amd3, havent got latest to hand) and you are correct for assessment of load on a final circuit to use that formula, can't get 15kW though...I get 13.8 to 14.4 depending on which voltage you prefer (!) thats for 2 appliances on same circuit.

 

[John Arnold]

Steve D read the top line of the instructions again.