Installing New Range Cooker

[BeckyLH01]

Hi everyone,

I'm hoping someone will be able to give me some advice.

I've just bought a new range and it needs installing, including installing a new cooker circuit as the last one was all gas.

It's this cooker...

http://www.smeguk.com/Catalogue/Product/SY92IPX8_print.htm

I've not settled on the electrician yet as I've had varying advice from them! My dad is a sparky but retired.

From what I can gather I'll need a 63A breaker at the consumer unit. I've been told 10mm twin and earth is not good enough though. There is also no cable supplied with the cooker, this is the recommendation...

But I've been told this is not readily available and most sparkies would just use twin and earth from the isolator switch. Is this right?

Any advice would be most appreciated!!

Thank you!

 

[captaincaveman1]

It needs to be on 6mm twin and earth and connected to 30amp cooker circuit

 

[riveralt]

If you don't have a dedicated cooker circuit then you will need to have one installed. This work is notifiable by the way.
Under normal circumstances (no insulation issues) you would run 6mm2 T&E from a 32Amp MCB located at the Consumer Unit. This circuit will need to be additionally protected by a RCD unless the cable is clipped direct all the way.
The 6mm2 T&E would run to a Dual Pole cooker switch located above the worktop and near to the cooker - no more than 2metres from it.
From the Cooker Switch you could run the 6mm2 T&E or the recommended H05V cable directly to the cooker of via a cooker connection unit.

 

[BeckyLH01]

Would 6mm not be too little for a 15+ kw output?

 

[EFLImpudence]

No. it's fine for a cooker.

 

[Adam_151]

The standard diversity guidelines allow a 32A cooker citcuit for upto 15kw in domestic due to not everything being on at once.

I feel thats cutting its a bit close to the bone with this size appliance and as a new cable is to be installed, I'd go to for for a 10mm circuit and seek to have it on a 40A/45A breaker.

Others may feel I've over engineering it, but I've had a range cooker like this tripping out a 32A in the past

 

[riveralt]

Would 6mm not be too little for a 15+ kw output?

Put 10mm2 T&E in if you want but the manufacturers say 6mm2 is sufficient.
Assuming the cooker switch does not have a socket incorporated your cooker will take 27.6 Amp after diversity. The cable is rated at 46Amp when clipped direct and your MCB at 32Amps so everything is okay.

 

[Alexiey]

With regards a new RangeMaster cooker installation, you have to think, What is going to be my highest demand? Christmas, Birthdays, Special dinner parties etc when perhaps you have both ovens on going full warp 10 plus a few rings as well, in other words full demand on the circuit.

What I have done is fitted a 10mm^2 cable to a 45A breaker. What you dont want is that the cable overheats and melts BEFORE the breaker trips, YES?

So thats the sensible way forward also you should have a RCBO breaker which will give protection for earth leakage. Be safe not sorry and do the ground work BEFORE you begin that way you will be grateful in the future

Kind regards
Alexie

 

[securespark]

The instruction book says a copy of the plate showing the loadings is attached to the booklet that came with the oven. What does that say?

If you can at this stage, it is best to allow for FL if possible.

 

[mattylad]

You also have to consider the next cooker, the rangemaster may break down in 5 years time and not be repaired but replaced because er indoors wants a new look in the kitchen.

So if its not a big cost increase, going for the thicker cable might be better considered.