Cable trays are components of Cable Management Systems (CMS) to securely fasten and protect cables. A cable tray system supports and protects both power and signal cables and facilitates upgrading, expanding, reconfiguring, or relocating networks.
The advantages of using cable trays include wiring system design flexibility, simplicity, and lower installation cost. In plants where equipment is added, moved or taken away, cable trays provide a flexible advantage and adapt to complex configurations with a simple set of tools. Fabricated in numerous styles (single rail, wire mesh, ladder, ventilated trough, channel, and solid-bottom), cable tray system present significant savings in labor costs when compared to conduit installation.
Cable trays can be used in a variety of settings — outdoors, indoors, corrosive and classified hazardous locations, and areas with high electrical noise and vibration. As with any electrical equipment, cable trays and the wiring contained in the trays must be listed, labeled or otherwise approved.
Cable Tray Institute
The Cable Tray Institute (CTI) was founded in 1991 to support the cable tray industry by engaging in research, development, and education on the design, specifications and installation of cable tray systems. The CTI disseminates periodical information and technical bulletins to promote and enhance the visibility of the cable tray industry.
Companies involved in the development of cable tray systems or accessories are eligible for membership.
The Noted Members of CTI
CTI is supported by leading cable tray suppliers and manufacturers such as the ABB, Atkore International, B-Line by Eaton and Legrand Cablofil to name a few.
Cable Tray Institute – Cable Tray Standards
The Cable Tray Institute has made available practical guides for the proper installation of aluminum or steel cable tray systems. These guidelines will be useful to engineers, contractors, and maintenance personnel. Ongoing periodic reviews are done to reflect advancing technology and construction techniques.
Click here for more information on prominent cable tray codes, standards and installation guidelines.
VE 1, Metal Cable Tray Systems
VE 1 provides technical requirements concerning the manufacturing, testing, and performance of metal cable tray systems. It is the first joint effort of *NEMA and CSA International to put in one place standards for metal trays.
*NEMA stands for the National Electrical Manufacturer’s Association. NEMA ratings are standards that define the types of environments an electrical enclosure can be used in.
Download the NEMA VE 1 standards.
VE 2, Metal Cable Tray Installation Guideline
VE2 is a NEMA standard that outlines installation practices, material control, unloading, handling, storage and shipping of metal cable tray systems. Information on maintenance and system modification is also provided.
Download the NEMA VE 2 standards.
UL 568, Non-metallic Cable Tray Systems
This standard specifies the requirements for non-metallic cable trays and associated fittings designed for use in accordance with the rules of the Canadian Electrical Code (CEC) Part 1, and the National Electrical Code® (NEC)
Download the UL standards
FG 1, Fiberglass Cable Tray Systems
NEMA FG1 addresses the standards for fiberglass cable tray systems. It covers construction and test requirements for continuous, complete non-metallic systems of ladder, ventilated, solid bottom cable trays, or channel type trays, intended for the support of power or control cables, or both.
If you are looking for additional information regarding the CTI standards, kindly visit the website cabletrays.org
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