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Information Sheet 1.2-4 Installation of Wire Ways and Cable Trays

Cable trays are used to support electrical cables for power distribution, control, and communication in commercial and industrial buildings. They provide an alternative to open wiring or conduit and allow for changes to wiring systems since new cables can be easily laid in the tray. The document outlines the proper procedure for installing cable trays which includes selecting the appropriate tools, inspecting the material, marking the installation route while maintaining minimum clearances from other services, and hanging/supporting the trays as specified in drawings. A self-check questions section reviews key points about industry standards for cable tray installation.

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Marc Gelacio
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2K views4 pages

Information Sheet 1.2-4 Installation of Wire Ways and Cable Trays

Cable trays are used to support electrical cables for power distribution, control, and communication in commercial and industrial buildings. They provide an alternative to open wiring or conduit and allow for changes to wiring systems since new cables can be easily laid in the tray. The document outlines the proper procedure for installing cable trays which includes selecting the appropriate tools, inspecting the material, marking the installation route while maintaining minimum clearances from other services, and hanging/supporting the trays as specified in drawings. A self-check questions section reviews key points about industry standards for cable tray installation.

Uploaded by

Marc Gelacio
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Information Sheet 1.

2-4
Installation of Wire ways and cable trays

Learning Objectives:

After reading this information sheet, the trainee is expected to:

1. Explain the purpose of having a system of wire ways and cable


trays
2. Determine the appropriate procedure of installing a wire way
and/or cable trays
Introduction:

In the electrical wiring of buildings, a cable tray system is used to


support insulated electrical cables used for power distribution, control,
and communication. Cable trays are used as an alternative to open wiring
or electrical conduit systems, and are commonly used for cable
management in commercial and industrial construction. They are
especially useful in situations where changes to a wiring system are
anticipated, since new cables can be installed by laying them in the tray,
instead of pulling them through a pipe.

Image is lifted from Wikimedia website1

This Information Sheet will explain the Procedures or sequence of


activity for safely installation and Testing of cable tray, and it’s
accessories as per the standard Practice and Code.

1. Choose the right tools and equipment. The following tools and
equipment that will be engaged for Installation of Cable Tray will be
Screwdriver, Pliers, Spanner, Hammer Drilling Machine with various
Bits , Grinding & Cutting Machine Electrical Tester , Continuity Tester
,Multi Meter Cutter , Blower, among others.

1
https://commons.wikimedia.org/wiki/File:Cable_tray_with_cables_20170514.jpg
2. Conduct an Inspection of the material to be used (Cable Tray). A
visual inspection of the type, standard thickness, height, proper
painting, and galvanization. Check for the physical damages if there is
any and the fittings of the cable tray. Testing of galvanizing by looking
at the Uniformity of coating Thickness Test, Electrical continuity of
connection, TRs not more than five year old from date of purchase
order shall be reviewed for acceptance. Otherwise test shall be carried
out.

3. Installation Proper. Mark the route of Cable Tray and Trunking as


per approved drawings with marking threads. The route of Cable Tray
and Trunking need to be coordinated with other services and shall be
confirmed by the Site Engineer. Minimum space from the building
structure and other services to be maintained (200 mm from the
nearest point) to facilitate easy handling and maintenance of cables. If
Possible, Do not install Cable trays below water/sewage pipes. Ensure
that the location of hangers and supports should be carefully marked
as per the approved specifications and Drawings.

Below is an example of a Wire way and Cable Tray Illustration:

Image is lifted from Cable organizer website2


Self-Check 1.2-4
Installation of Wire ways and cable trays
2
https://www.cableorganizer.com/learning-center/articles/wire-cable-trays-code-compliance.html
1. Installing Cable trays below water/sewage pipes is prescribed
or allowed under Industry Standard?

2. A visual inspection of the type, standard thickness, height,


proper painting, and galvanization can be by-passed?

3. Cable trays are commonly used for cable management in


residential construction?

4. Cable Trays not more than five year old from date of purchase
order shall is longer be reviewed for acceptance?

5. Minimum space from the building structure and other


services to be maintained is 100 mm from the nearest point?
Answer Key 1.2-4
Installation of Wire ways and cable trays

1. FALSE
2. FALSE
3. FALSE
4. FALSE
5. FALSE

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