cable size

[mcm]

what cable would be best for a 11.4kw cooker 16 meters long under floor boards and in the wall.

 

[ian]

I am with DES 56 on this. The regs say 6mm is fine, they are what we all work to and I would only install a 6mm cooker. My view is that cable is far too expensive to un-necessarily oversize.

Ian

 

[Spudnik]

Have to agree also with the 6.

The total load will rarely get reached as only one function at a time will be used on the appliance.

6mm it is, on a 32

 

[pushrod]

and just to quote from the electrician's guide to the building regs
"A 30A or 32A circuit is usually appropriate for household or similar cookers of rating up to 15kW"

(section 4.4, page 55)

 

[mcm]

^^^^^ 6mm is already the existing cable, from what I have read you are lookiung to make work where it is not neccessary?????

You are asking REALLY basic questions with this and your last post, are you qualified to be doing this work?

Dont forget this is notifiable.

yes thanks you. whats wrong in asking nothing is the answer

 

[Octopus]

Applying diversity may be permissable, but I would always go for 10mm on a cooker circuit on the basis that if the customer is cooking for a group then they are most likely to use all the ovens and rings at the same time.

 

[pushrod]

Applying diversity may be permissable, but I would always go for 10mm on a cooker circuit on the basis that if the customer is cooking for a group then they are most likely to use all the ovens and rings at the same time.

But they don't really work like that. It's not like a 60 watt bulb that is using that power all the time it is on. The 12kW, 15kW etc is a theoretical max but once they are on the power is constantly being switched/cycled, and to maintain a temperature only a fraction of the max is being used. Plus a 32A breaker and 6mm cable correctly installed are not going to be adversely affected by taking 35Amps for up to an hour (or even larger currents for a shorter time) and this really is extremely unlikely anyway.
.