I am buying a new consumer unit for a qualified electrician (Part P) to fit, Is a WYLEX RCD 63A 30mA. Ok to buy to connect to a 9.5KW shower, already installed, With 10mm cable 15 meters? It goes up a plasterboard wall then acroos the loft to bathroom, i have to buy all mcb's/ rcd's seperate for consumer unit, Thanks.