I have recently had a new boiler fitted and the plumbers removed the immersion tank from my airing cupboard. I am in the process of refitting my bathroom but there is a fused switch that was used for the central heating controls boiler and gas fire it has been been spurred of the first floor sockets. How can i make this connection safe and seal up behind a plasterboard wall. I have been told to remove the switch and connect to a junction box then place it behind a wall is this the best and easiest metod