| Please
read the disclaimer
before attempting any electrical work. If you
are uncertain then contact a qualified
electrician.
Electrical back boxes generally
come in two sizes. One gang (Single) two gang
(Double) Single back boxes are used for light
switches, single sockets and switch fused spurs.
Double back boxes are used for double sockets.
There are different depths of back boxes depending
on what it is used for. Shaving sockets, cooker
switches and shower pull cords require deeper
back boxes (ideally 47mm).
Light switches (not dimmers) should be 16mm.
Sockets, dimmer switches and fused spurs should
be 25mm.
| Pictures |
Ideal
surfaces |
Pro's |
Con's |
 |
- Brick
- Breeze Block
- Plaster |
- Strong
- Tough |
- Must use rubber
grommets
- Hard to chase in the wall
- Hard to chase in the wall neat
- Must earth back box |
 |
- Brick
- Breeze Block
- Plaster |
- Strong
- Tough |
- Must use rubber
grommets
- Hard to chase in the wall
- Hard to chase in the wall neat
- Must earth back box |
| |
- Plaster board |
- Flush to the wall
- Very neat and tidy |
- Can sometimes see
the lip around the edge of socket
- The lugs are weak
- If plasterboard is too thick it can
be difficult to push the lugs out |
| |
- Plaster
board |
- Flush
to the wall
- Very neat and tidy |
- Can
sometimes see the lip around the edge
of socket
- The lugs are weak
- If plasterboard is too thick it can
be difficult to push the lugs out |
|
- Brick
- Breeze Block
- Plaster
- PlasterBoard |
- Easy to install
- Clean to install |
- Prone to impact damage
|
|
- Brick
- Breeze Block
- Plaster
- PlasterBoard |
- Easy to install
- Clean to install |
- Prone to impact damage
|
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