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
Backbone Cable Tray System Installation
- 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.
Standards Codes and References for Backbone Cable Tray System Installation
1. SAES-T-916, Telecommunications Building Cable Systems.
2. Commercial Building Standard for Telecommunications Pathways and Spaces.
Telecom Closet / Telecom Equipment Room Size And Location
Telecommunications Infrastructure Design Process
J-STD-607-A Commercial Building Grounding (Earthing) and Bonding Requirements For Telecommunications
ANSI/TIA/EIA 568-B Commercial Building Telecommunications Cabling Standard
Telecommunications Outside Plant Systems Design SAES-T-938 Download.
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