As indicated in Chapter 7, the main alternatives to conduit systems are (a)
PVC-insulated and sheathed cables, and (b) MICS cables. These may be run
on the surface or concealed.
Surface wiring is normally restricted to existing property or other areas
where it would be inconvenient or expensive to conceal the cables or where
appearancens not important.
PVC-sheathed wiring
This is the most common system for domestic installations. Where the cables
may be subject to mechanical damage they should be protected by channelling
or conduit. The protective conductor must be taken to all lighting switche
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