Metal Trunking is used as cable supporting system in electrical installation. Commonly are install for shoplots, office or even house premises. This trunking stores all types and sizes of electrical cables. Commonly it is hidden behind plaster within walls or underneath flooring, and helps keep everything in the position.
Support all electrical cables into one trunking
All metal trunking comes with standard color ORANGE painted on the surface and body of the trunking system.
Common types of plastic conduit include PVC and UPVC trunking, halogen-free ABS conduit, polyamide, and polypropylene. Flat PVC cable conduit is often used around skirting or in dado installations, and white or black plastic trunking is a common sight in various workplaces, particularly offices.
Plastic like PVC.
Stainless steel.
Silver enamel on zinc coating.
Grey enamel on zinc coating.
Hot dipped galvanized coating.
Basic dimension for metal trunking are available in the market. Standard length of the trunking metal available are 10 feet or longer length upon request from vendor.
1" x 1" - suitable for small wiring such as lighting circuit.
1" x 2" - commonly insert with power circuit.
2" x 2" - can support more up to 30 cables
2" x 4"
2" x 6"
3" x 4"
4" x 6" - for larger cables
Commonly this type of trunking metal is required to be grounded or connected with CPC (circuit protective conductor).
Trunking system comes with complete accessories for installation purpose on site.
trunking jointer
L angle
T shape
Table above gives maximum support spacings for cable trunking in terms of trunking cross-sectional area and material for both vertical and horizontal runs. Additional supports may be required at changes of direction and other bends or, indeed, where the trunking is likely to be subjected to mechanical impact and vibration.
Topics relates : Conduit System