Backbone Cable Tray System Installation

This article is about Backbone Cable Tray System Installation of Building Telecom Distribution System as per International Codes and standards.

Backbone Cable Tray System Installation | Telecom System

Verify that backbone cable tray locations is coordinated with lighting, air handling systems, fire extinguishing systems, etc., so that trays will not obstruct or impede system operation.
Verify that a minimum clearance of 30 cm (12 in) is provided between the top rail of backbone cable trays and ceilings.
Verify that backbone cable trays, and cabling are suspended from or attached to the structural ceiling or walls with hardware or other installation aids specifically designed to support their weight.
Verify that backbone cable tray and cables are not resting directly on ceiling panels, framework (T-bars), vertical supports, or other components of the suspended ceiling.
Verify that backbone cable tray is located 15 cm (6 in.) to 30 cm (12 in.) above the top surface of the cable tray side rail.
Verify that the backbone cable tray have a minimum of 8 cm (3 in.) of clear vertical space from conduits, wires, and cables.
Verify that the inside of backbone cable tray is free of burrs, sharp edges, or projections which can damage cable insulation.
Verify that backbone cable tray system is not used to distribute telecommunications and power cables together.
Verify that backbone cable trays are not installed in ceiling areas (lock tiles, drywall or plaster) that are inaccessible..
Verify the use of proper support for cable trays by installing cantilever, trapeze and individual rod suspension brackets.
Verify that supports are placed so that connections between sections of the backbone cable tray are between the support point and the quarter section of the span. A support shall also be placed within 0.6 m (2 ft) on each side of any connection to a fitting.
Verify that cable tray fills is not exceeding the manufactures listed capacity for the installed backbone cable tray.
Verify that during the installation that workers never use cable trays as walkways or ladders.
Verify that metallic backbone cable trays are bonded together and grounded to an approved ground source.
Verify that the backbone cable tray is readily accessible to technician and installer.
Verify that backbone cable trays are marked and identified as specified by EIA TIA-606, “The Administration Standard for the Telecommunications Infrastructure of Commercial Buildings” as per International codes and standards ANSI/EIA/TIA-569 para 4.5.5.
Verify that the backbone cable tray enters the TC in such a way that it does not block or cover other equipment and cabling.
Verify that the backbone cable tray is secured mechanically or anchored so that movement does not occur during installation of cables.
Verify that the installed backbone cable tray allows for 20% expansion of the horizontal cabling system.
Verify that the backbone cable tray is supported on 1500-mm(5 ft) centers unless designed for greater lengths.
Verify that backbone cable trays are not house or support cable splice closures.
Verify that backbone cable tray is used for managing and containing cable runs under access floors.