
Non-metallic conduit systems 109
FUSE BOARD
GROUND FLOOR WIRING
Fig.
7.2. Cables in a conduit lighting installation. Where cable is looped into switch or light
positions the conduit carries at least three cables
Non-metallic conduit systems
While steel conduits provide excellent protection against mechanical damage
and give earth-continuity when initially installed, condensation, rusting and
corrosion may present problems. There is also the possibility of electrical
continuity being impaired by corrosion during the life of the installation.
Non-metallic conduits can be obtained which:
(a) are highly resistant to corrosion by water, acids, alkali ...