fitting a replacement 13amp double socket

[gdf]

what i need to know is can a plastic moulded box be set flush into the wall (screwed to brick not plasterboard) like a metal box or do they all have to be surface mounted.

 

[securespark]

Moulded pattresses are designed so that the box face has the same dimensions as the socket (for surface-mounting), whereas the boxes designed for flush-mounting are designed to have their edges concealed when the socket is screwed into position.

You could use a surface pattress for flush mounting, but it would be difficult to get a neat cosmetic finish.

Why not use a box designed for flush-mounting?

 

[Pensdown]

Metal back boxes are smaller than surface boxes to ensure that the socket/switch covers it neatly when it's plastered in. They also have adjustable lugs so that when it's plastered in you can still level the socket/switch.

There is no reason why you can't use a surface box but for a few pence you're making the job hard work for yourself.

 

[Pensdown]

Although I was to slow....they can't say all sparks disagree all of the time