On 27/04/2012 13:08, Lee wrote:
Quick question, instead of replacing like-for-like, I'd like to upgrade
a 7.5kW shower to 9.5kW, obviously got to change the cable from 6mm to
10mm so this then becomes a "new" install.
Is RCD/RCBO protection now mandatory?

Regardless of the legal issue you would be very stupid not to have the
appropriate protection.

Peter Crosland