
Non-metallic conduit systems 111
conduit can be obtained to accommodate two 2.5 mm
2
twin-and-earth cables
side by side.
Fittings
A full range of fittings and accessories is available for use with insulated
conduit, catering for all conditions likely to be met. The range includes
couplings, saddles, adaptors, bushes, tees, bends, and junction boxes of all
types.
Square and rectangular boxes which accommodate standard lighting
switches or socket-outlets are also available.
Effect of temperature
Rigid PVC conduit and fittings are not suitable for use where the ambient
temperature is likely to fall below —5°C, or where their normal working
temperature ...