change of the cable

[funkye]

Hi,

I need to change 6mm cable to 10mm cable, because I bought 10.5kW shower.

As I have an old switch board I was told to put a RCD protection (30mA - 80A) between switchboard and switch for the shower. I also have MCB (40Amp, which should be enough).
Switchboard is located under the stairs (ground floor) and bathroom is on the 1st floor. Cable route is 4-5 meters.

Can anybody tell me aproximately the price only for the job?
I'm trying not to overpay that.

Thanks.

 

[mikhailfaradayski]

are you looking for a price just to supply and fit the rcd or a price to change the cable aswell?

 

[funkye]

Change the cable as well

 

[Spark123]

The 40A MCB will also need to be changed as a 10.5kw shower pulls about 44A.
Best bet is to look here and ask your friends or family for recommendations for an electrician:
http://www.competentperson.co.uk/search.asp