10ml or 6ml....? That is the question.........

[northbynorthwest]

Dear Electricians

I have had an Electrician intall 6ml wiring to a new Range master Excel double oven cooker that is 11 KW.

I am not an electrician, but I am very concerned that it is insufficient and could overload, Any thoughts ?....or brief comments are very welcome.

Thanks for your time. bad day explode

 

[ianmacd]

What protective device is this off of? What route does the cable take?

 

[m4tty]

+1 need more info mate. 6mm is good for 47a at best and 11000w/230v is 48a but will the cooker be able to draw the full current at once? I would have put 10mm in as cost difference is not alot but need more info on cpd and cable run. Cheers

 

[ianmacd]

He may have also applied diversity to his calculation. Is there a socket in the isolation switch?

 

[PC Electrics]

With diversity an 11kW cooker calculates to 21A. Add in 5A for a socket on the control = 26A.

As long as the cable does not pass through any insulated areas between the consumer unit and kitchen, then 6mm is fine on a 32A or 40A MCB.

According to the OSG a 32A/6mm circuit is good for 15kW domestic.

 

[northbynorthwest]

hi thanks for responding so quick....its on a new ring main from the hall near front door 40 feet away from cooker. cooker is on a separate circuit....cheers David

 

[batty]

hi thanks for responding so quick....its on a new ring main from the hall near front door 40 feet away from cooker. cooker is on a separate circuit....cheers David

That will be fine two times 6mm unusual to wire cookers on a ring though.

 

[ianmacd]

I suspect its not really a ring but a radial. What is the protective device? How does it get form the CU to the cooker? Does it pass though any insulation? Is it in any trunking?

 

[SPECIAL LOCATION]

Dear ElectriciansI have had an Electrician intall 6ml wiring to a new Range master Excel double oven cooker that is 11 KW.

I am not an electrician, but I am very concerned that it is insufficient and could overload, Any thoughts ?....or brief comments are very welcome.

Thanks for your time. bad day explode

Welcome to the forum northbynorthwest....

Why are you "very concerned"...

As you say yourself you are not an electrician I am intrigued as to where your worries arise from?

Is the electrician a "full time professional" or a mate from down the pub doing a favour?

If the electrician is a member of one of the approved contractor schemes do you have specific reasons to doubt his ability's, installation methods etc.. etc..

If you do, you could use the contractor body helpline / complaint procedure to have a second opinion.

But that said..

on the face of it with the limited information you have given

and without actually coming out to see the work face to face..

I would guess its probably OK!

Do you have access to any electrical books?

If not pop to a library and have a look at a copy of "On Site Guide"

The cover looks like this...

IEE On-site Guide; BS 7671 : 2008 IEE Wiring Regulations 17th Edition: Amazon.co.uk: The Institution of Engineering and Techn: Books

Turn to page 160..

last but one paragraph..

Talking about domestic cookers is suggests a 32Amp circuit (which is comfortable on 6.0mm cable) is usually appropriate for cookers up to 15kW rating!



unless you can elaborate a bit more onto specific worries and reasons I cannot comment further.

:C

:coffee