Domestic Installation Types
Under the broad heading above, there are basically two types of installation involved:
1. Flush Mounted Installation
2. Surface Mounted Installation
Flush Mounted Installation
This is the most popular method of installation used in domestic premises, because all cables, switch boxes, socket boxes etc, are concealed in the walls, floors and ceilings.
The job of wiring a house is done in two distinct stages.
Stage One, referred to as the ‘first fixing’, involves:
· Chasing of walls to accept the necessary conduits ( usually oval PVC type ) and flush boxes for switches etc,
· Drilling of ceiling joists to allow cables be run in.
· Provision of battens to which ceiling roses can be mounted,
· Running in of all necessary cables.
After this stage nothing more can be done until all ceilings and walls are plastered and skimmed.
Stage Two, referred to as the ‘second fixing’ involves:
· Fitting and connecting of light switches, sockets, ceiling roses, lamp holders etc.
· Fitting and connecting of the distribution board.
· Identifying and marking all circuits.
· Testing the completed installation.
Flush mounted installations are covered in Phase 2 by the use of a simulated plasterboard partition to which certain flush mounted boxes can be attached. All other work will be as for a surface mounted installation.