Cooker supply 12kw correct cable size

[Adamk]

Hey guys

I’ve run a 6mm for a cooker, runs about 10metres. The customers has changed her mind on the cooker and gone for a 12kw range. Went back today to finish off and saw this lovely surprise. I know you have to take diversity into account. But for my peace of mind. Would 6mm 32a MCB be fine?

Kind of panicking a bit as the jobs finished.

What you think? Please dont tell me to tell her to change it as that’s not really an option Thanks

 

[Ian1981]

Our 17.7 kw Rangemaster is on 10mm but the OEM said 6mm would be good enough1

What cable type and size did you connect from the cooker outlet to rangemaster?
17.7kw sounds like a beast!

 

[Adamk]

What cable type and size did you connect from the cooker outlet to rangemaster?
17.7kw sounds like a beast!

Must be 10mm on a 40a mcb... with the cooker switch rated at 45amps... my personal choice

 

[Ian1981]

Must be 10mm on a 40a mcb... with the cooker switch rated at 45amps... my personal choice

I meant from the outlet to the actual cooker, rather than from the OCPD to the isolator/outlet
I can’t recall seeing a domestic cooker/oven being able to take 10mm in its terminals

 

[Octopus]

What cable type and size did you connect from the cooker outlet to rangemaster?
17.7kw sounds like a beast!

This one:

Toledo 90cm Range Cooker - Induction Hobs | Rangemqaster - http://www.rangemaster.co.uk/products/range-cookers/toledo/toledo-90-induction

Ignore the bit about gas ........... its all electric!

My connecting cable is 10mm T&E!

 

[Ian1981]

This one:

Toledo 90cm Range Cooker - Induction Hobs | Rangemqaster - http://www.rangemaster.co.uk/products/range-cookers/toledo/toledo-90-induction

Ignore the bit about gas ........... its all electric!

My connecting cable is 10mm T&E!

All that just to heat up a tin of baked beans

 

[mattg4321]

Must be 10mm on a 40a mcb... with the cooker switch rated at 45amps... my personal choice

Why must it?

 

[Octopus]

All that just to heat up a tin of baked beans

Ask the misses ........... her "toy"

 

[Adamk]

I meant from the outlet to the actual cooker, rather than from the OCPD to the isolator/outlet
I can’t recall seeing a domestic cooker/oven being able to take 10mm in its terminals

Why must it?

well if 6mm goes up to a total of 14/15kw and his is 17.7kw next cable up is 10mm and that’s a 40a breaker and obviously double cooker switch is rated at 45amps, might aswell do 10mm from the load to cooker aswell. My personal choice.

 

[Octopus]

the extra cost for 10mm over 6mm isn't much ..........

 

[mattg4321]

If you use diversity then 17.7kw cooker comes out around 30A so in general 6mm2 is going to be fine imo.

 

[Adamk]

If you use diversity then 17.7kw cooker comes out around 30A so in general 6mm2 is going to be fine imo.

True, but you charge the customer the extra money for the bigger size cable and it’s no real difference running it in. Even though it comes out at 30a I’d say you were pushing the boundaries. Nothing wrong with what your saying, just rather chuck a 10mm in. If I would of known my customer was putting in 12kw cooker (hense my original post) I would of put a 10mm in.... peace of mind I guess

 

[Midwest]

We've just had a new 'range' style cooker installed, primarily 'cos the old one was rubbish, and the door wouldn't close.

The old one was about 2.2kW (total), and connected with the manufacturers 1.5mm flex to a 10mm 45amp supply. I chose the install/disposal method 'cos it had gas hobs, and they can hump old & new about.

The new one has a total load of 8.6kW, and you can have all elements on at the same time. Now I was quite comfortable with the old set up, and would of been happy connecting new oven to 6mm 32amp supply.

Come installation day, engineer commented old connection was wrong, and he had to check I had a 10mm 40amp supply for the new one. He also used a bit of 10mm tw&e from cooker outlet to oven.

I've been meaning to clamp the thing on start up, just to see how many amps its pulling and for how long. But, somehow I don't think 6mm would of been a problem.

 

[telectrix]

Come installation day, engineer tick box muppet commented old connection was wrong, and he had to check I had a 10mm 40amp supply for the new one. He also used a bit of 10mm tw&e from cooker outlet to oven.

corrected that 4U.

 

[Midwest]

Come installation day, engineer tick box muppet commented old connection was wrong, and he had to check I had a 10mm 40amp supply for the new one. He also used a bit of 10mm tw&e from cooker outlet to oven.

corrected that 4U.

I was being polite. He said he was gas safe whatever (hope he was, 'cos he connected gas) and ..........what for it.............'Part P'dd' until last year, when his company stopped registering them.

 

[telectrix]

should have got a plumber in, then you could run the 15kW shower and the upstairs lights from the same 6mm cooker circuit