Electric cooker 10kw question

[Genkville]

Hello.

Got a noon question

I'm buying a 10kw Electric cooker and was wondering if it'll work fine with the power I have. I can't figure out how much kw runs through to the cooker socket. The photo below is all I have.

If we can't figure it out then I'll just buy it and see what happens from there

http://imgur.com/X3Ex1UX

 

[ban-all-sheds]

Hello.

Got a noon question

Well you're over 5 hours late.

I'm buying a 10kw Electric cooker and was wondering if it'll work fine with the power I have. I can't figure out how much kw runs through to the cooker socket.

40 x 230 = _________ ?

 

[AndyPRK]

9.2kW

With diversty it will be fine

 

[EFLImpudence]

With diversty it will be fine

And without.

At 230V the cooker is 9.18kW

 

[Genkville]

So can I wire it up?

I knew that 40a meant 40am which you'd divide by 240 volts.

 

[ban-all-sheds]

FGS

So used to cooker circuits being 32A that I didn't even think about the simple A x V calculation, so missed the fact that diversity would still need to be explained.

 

[EFLImpudence]

So can I wire it up?

Yes, it's fine.

I knew that 40a meant 40am which you'd divide by 240 volts.

40 Amps multiplied by 240 Volts = 9.6 kW

However, calculations should be done at 230 Volts so -

40 x 230 = 9.2 kW and
@ 230V your cooker is 9.18 kW

So all is well.




Diversity is an allowance made because cookers 'cycle' and not all of the elements will be on at the same time.
Diversity is the first 10A + 30% of the remainder (+ 5A if there is a socket in the cooker switch).

So, 9180W / 230V = (39.9A - 10) x 0.3 + 10 = only 18.9A + 5A = 23.9A.

So all is even weller.

 

[PrenticeBoyofDerry]

So can I wire it up?

I knew that 40a meant 40am which you'd divide by 240 volts.

The 40A stand for 40 Amps, this is the device protecting your cable, so cable size would be important to know.

In general it is considered that a 32A circuit on a 6.00mm2 twin and earth cable can deal with a load up to 15kW, when diversity is factored in.
So providing the cable sizing is correctly sized, then you should be okay.

 

[Genkville]

So what cable size do I need?

Also, by cable size do you mean length?

BTW thanks for the support so far. Appreciate it

 

[EFLImpudence]

You will need 2 metres in length.

You should use 6mm² heatproof flexible cable.

It is likely you could use smaller flex but we cannot be sure from here.

 

[JohnW2]

FGS So used to cooker circuits being 32A that I didn't even think about the simple A x V calculation, so missed the fact that diversity would still need to be explained.

Did you mean "... diversity does not need to be explained" ?

As EFLI has pointed out (in a slightly different way), if the 10kW is quoted at 240V, then at 230V we would have 39.93A (without diversity) running off a 40A MCB - so diversity is (just!) not needed.

Kind Regards, John

 

[winston1]

As EFLI has pointed out (in a slightly different way), if the 10kW is quoted at 240V, then at 230V we would have 39.93A (without diversity) running off a 40A MCB - so diversity is (just!) not needed.

Kind Regards, John

But his supply voltage is almost certainly 240volts anyway.

 

[JohnW2]

But his supply voltage is almost certainly 240volts anyway.

Much more likely to be closer to 240V than to 230V, yes. However, as you know, we are required to undertake calculations on the basis of 230V, whatever you may think about that. Once could arguie that one should use the 'worst possible' voltage (253V), but the regs have obviously decided that's not necessary - perhaps because of the 'safety margins' which are built into everything (like cable CCCs).

Kind Regards, John

 

[Genkville]

Can someone give me a link to the cable I need? Please.

 

[EFLImpudence]

http://www.sparkydirect.co.uk/produ...-Resisting-Flex-Black--50-Mtr-Drum/index.html