i will be added 2 spurs from 2 sockets in my utility for the tumble drier and washing machine. is it ok just to use a switched single socket for these behind the adjasent cuboard. i would intend drilling a large access hole into the back of the cuboard so that you could switch it off or disconnect if required. also surface mounted cable behind the units does this need to be in capping or is plain surface mount clipped to the wall ok?