How deep should a Pattress box be?
How deep should a Pattress box be?
35mm
Metal in Wall Pattress Boxes The UK Standard size is usually a 35mm depth of back box and this will be suitable for most switches and sockets.
How deep is a standard back box?
When considering what depth Back Box to use, the general rule is to use a 3.5″ box for stations with 3 or more connectors. (This is a change from the previous standard of 3.5″ boxes for 4 connector boxes.) This will be reflected in the standard drawings.
Should Back box be flush with wall?
They should be flush, ideally. Some brands of sockets and switches have a bit of a “lip” on them, so the sockets will still be flush even if the boxes are 2-3mm proud. More importantly, don’t sink them too deep. You will leave a gap between the socket and the box and debris (bits of plaster etc.)
Do you need to earth plastic back boxes?
The Q&As state the box is plastic, so doesn’t require an earth, but has the capability to add an earth terminal if required. If it does not require an earth is there any advantage or point in adding one? Thanks.
Can you put plastic back box in wall?
Different Types and Sizes of Plastic Back Box Essentially it works the same way as a metal back box and is recessed into the walls surface allowing the socket or switch face plate to fit flush with the walls surface.
What is a surface pattress box?
Surface pattress back boxes are designed to be used where installation within the wall is not possible or desired. This means that surface mounted back boxes are required to install wiring devices, which can result in less labour and mess as the walls do not need to be chased or chiselled.
Do you need to earth a plastic back box?
Plastic back boxes are insulators (not conductors), so don’t need to be earthed.
Why is it called a pattress box?
The word “pattress”, despite being attested from the late 19th century, is still rarely found in dictionaries. It is etymologically derived from pateras (Latin for bowls, saucers). The term is not used by electricians in the United States.
How far should a socket be from a corner?
Electrical sockets, switches and other electrical control devices should be a minimum of 350mm from corners of a room.