This article is about Horizontal Cable Tray System Installation of Building Telecom Distribution System as per International Codes and standards.
Horizontal Cable Tray System Installation | Telecom System
Horizontal Cable Tray System Installation
- Verify that horizontal 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 horizontal cable trays and ceilings.
- Verify that horizontal 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 horizontal 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 the horizontal 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 horizontal cable tray have a minimum of 8 cm (3 in.) of clear vertical space from conduits, wires, and cables.
- Verify that the inside of a horizontal cable tray is free of burrs, sharp edges, or projections which can damage cable insulation.
- Verify that horizontal cable tray system is not used to distribute telecommunications and power cables together.
- Verify that horizontal cable trays are not installed in ceiling areas (lock tiles, drywall or plaster) that are inaccessible..
- Verify the use of proper support for the horizontal cable trays by installing cantilever, trapeze and individual rod suspension brackets.
- Verify that supports are placed so that connections between sections of the horizontal 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 horizontal cable tray fills is not exceeding the manufactures listed capacity for the installed cable tray.
- Verify that during the installation that workers never use horizontal cable trays as walkways or ladders.
- Verify that metallic horizontal cable trays are bonded together and grounded to an approved ground source.
- Verify that trays are marked and identified as specified by EIA TIA-606, “The Administration Standard for the Telecommunications Infrastructure of Commercial Buildings”.
- Verify that the cable tray enters the TC in such a way that it does not block or cover other equipment and cabling.
- Verify that the cable tray is secured mechanically or anchored so that movement does not occur during installation of cables.
- Verify that the cable tray is readily accessible to technician and installer.
- Verify that the installed cable tray allows for 20% expansion of the horizontal cabling system.
- Verify that the cable tray is supported on 1500-mm(5 ft) centers unless designed for greater lengths as per internal codes and standards EIA/TIA-569 para 4.5.5.
- Verify that cable trays are not house or support cable splice closures.
- Verify that cable tray under access floors must be fully accessible without moving building fixtures, equipment, or heavy furniture or disturbing building occupants.
Standards Codes and References for Horizontal 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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