Cable Conduit, Trunking & Routing

To conceal cable conduit trunking into a solid wall you need to follow some basic steps. Firstly you must make a channel in the wall ensuring that it is 6mm wider and 3mm deeper than the conduit you are using. Then cut the conduit to the required length and feed your cable through. This can now be fixed within the channelling using any self-adhesive backing, conduit clips or nails before plastering the wall for a clean neat finish.

Determining cable conduit size

To calculate the conduit size you require, you must first multiply the cross-sectional area of each cable by the appropriate factor, the total factor for each of your cables must not exceed the capacity factor recommended for each conduit diameter.

Conduit Diameter (mm)            Capacity Factor

·         16mm                                           290

·         20mm                                           460

·         25mm                                           800

·         32mm                                           1400

How many cables fit into conduit and trunking?

The recommended maximum fill percentage of a conduit containing just 1 wire is 53%, for 2 wires, the maximum percentage is 31% and if the conduit contains 3 or wires, the maximum percentage is 40%. The size of the conduit you require can all be checked by calculating the cross-sectional area of the wires that will be contained within the conduit.

When incorporating bends within the conduit, it is recommended that 15% is subtracted from the maximum cross-sectional area being used. You should also avoid using 2 or more 90° bends in a single section of conduit.

Calibrate new and existing equipment
Get a quote online, quick and easy
Return online within 30 days

Guides & Articles

article1_image

Our cable ties guide looks at the different types that are available on the market and the differences between them, with some handy tips on using them

article1_image

Not all Ethernet cable is the same. What makes Cat 6 different to other network cables? Our guide looks at the differences helping you decide

Related Products
The Legrand flush mounted adaptable box is designed ...
Description:
The Legrand flush mounted adaptable box is designed to be mounted onto plasterboard or plywood and is supplied with a cover and screws. This box is known for providing maximum volume for multiple conductors and connectors. It serves as the common junction point for splices of electrical wires where they ...
This Plexo junction box with 7 direct entry ...
Description:
This Plexo junction box with 7 direct entry membrane glands has been specially designed for safety circuit installations in work premises and public buildings. The junction box benefits from interchangeable end caps with direct entry for IRL tubes up to Ø16 and R02V cables. Snap-on lid with clippable tie between ...
Resistance to glow wire test: 750 °COperating temperature: ...
Description:
Resistance to glow wire test: 750 °COperating temperature: – 25 °C to + 40 °CInterchangeable membrane glands with direct entry Captive cover with clippable tie between box and cover except boxes 310 x 240 and 360 x 270Cover opens/closes with a 1/4 turn of a regular screwdriver Can be associated ...
Couplers - PVC straight couplers for joining lengths ...
Description:
Couplers - PVC straight couplers for joining lengths of conduit Adapters - supplied with PVC locknuts (male) or bushes (female) which enable conduit to be terminated at a panel or bulkhead Saddles - space bar saddles moulded in rigid PVC complete with fixing screws Surface Mount Boxes - various configurations, ...