In the UK there are very strict rules on who can and cannot do certain electrical jobs. This is mainly due to the fact that, as we all know, electricity is extremely dangerous and when working on or around it, it is essential that you know what you are doing.

A shaver supply unit complying with BS EN 61558-2-5 may be installed in zone 2 of a location containing a bath or shower (Regulation 701.512.3 refers). In both cases, the cables are run down through the ceiling and down a chase cut into the wall to run to both locations Once this is done, a minor works certificate is then issued to prove the installation has been carried out correctly. A thermal cut-out is provided in a shaver supply unit to limit the temperature of the transformer under conditions of short-circuit or overload. The cut-out may be of either the self-resetting type or the manually resetting type.As previously mentioned, if you are sing a lighting circuit make sure it’s RCD protected. If it isn’t then you can’t use it. All wires are then set into the wall and capped with protective sleeving and then all chases are filled, smoothed off and the either painted or tiled over.

Once all the wires have been connected, the face plate is then screwed on to the pattress box, fixing it in place.

Which Back Box do I Need?

If no supplies are this conveniently placed then it may be that you have to take up some floorboards in an above room and run your supply from here. Ideally look for a model with double wound isolating transformer, integral overload protection and shutters on the plug inlets to prevent any accidental splashing.