oven supplies 4mm or 6mm???

[A032701]

I am often installing two 3.5kw ovens in one kitchen which amounts to 30amps.
I cant see that there are any problems with supplying them both with a single 4mm on 32mcb, (installation method c)
i have normally supplied it in 6mm but just wondering really. is it just bad practice, in case they uprate the ovens?

 

[A032701]

I think that, in this instance, future proofing seems to be a smaller CSA cable - I’m kidding but does seem to be the case!

Yeah but better to have too large csa than re running because its too small.

 

[l4urence]

I think that, in this instance, future proofing seems to be a smaller CSA cable - I’m kidding but does seem to be the case!

Interesting! Reading recently that as we move to more energy efficiency the csa will go UP so the cables run cooler for such loads. I think we'll see the regs pushing more for this in the 19th... 20th? I wonder how much influence the cable manufacturers have on the IET?

 

[telectrix]

use 1.5mm strung in free air. dry the dishcloths on it. 2 uses for the price of 1.

 

[MG201]

I have seen many a kitchen fitter using 2.5mm cable and spur off the kitchen ring . This is used for a cooker and hob, absolutely shocking and when I ask I get the attitude , just wait till Xmas when they have the oven on and all the rings maybe even the grill , if I'm right they won't be cooking any Xmas dinner as that cable will be melting ( am I right )

 

[Deleted member 26818]

I am often installing two 3.5kw ovens in one kitchen which amounts to 30amps.
I cant see that there are any problems with supplying them both with a single 4mm on 32mcb, (installation method c)
i have normally supplied it in 6mm but just wondering really. is it just bad practice, in case they uprate the ovens?

Though 4mm2 can be acceptable, I would prefer to use 6mm2.
As you say they may uprate the ovens.
Then again, I have no idea in the difference in price between 4mm2 and 6mm2.

 

[Octopus]

I have no idea in the difference in price between 4mm2 and 6mm2.

About 50p per meter!

on 90% of jobs not worth worrying about