Cooker Circuit question

[joepublic]

I will soon get a new "All electric cooker" fitted.
Total rating 14.8Kw.
Total cable run: 8 meters from CU (mostly surface)
This will be done by an electrician, but I will do the shopping in preparation. The set up is:

1- 50A MCB (already fitted on the non-RCD side of the CU)
2- 10 mm T&E from CU to 45A DP CCU (no socket)
3- 10 mm T&E from CCU to 45A Terminal Outlet Box
4- From T.O.B. to Cooker : Heat Resistant Flex(?) or 10 mm T&E

Could anyone advise if:

A - Above set up is OK

B - what size Heat Resistant Flex should I get? The biggest size I can find is 3 core 2.5 mm flex, but is this enough? If not what size & where can I find it?

C - Or would 10 mm T&E suffice? Bare earth conductor to be sleeved only?

I'd like to prepare all these ready for the sparks to install.
My gas cooker packed up & currently living on takeaways! Missus is not happy!

Any advice / comment very much appreciated.
Thanks
joepublic

 

[Diyisfun]

Heat resistant flex should not be required.

Edit..Didnt see you had 10mm twin, thats will do

 

[RF Lighting]

Can he not supply his own gear? This is notifiable work. Make sure your electrician can self certify and provides you with a certificate.