This article is about Square “D” Ducting System Installation for Building Distribution System (Telecommunication) as per international codes and standards.
Square “D” Ducting System Installation | Telecommunication System
Square “D” Ducting System Installation
- Verify that ceiling ducting system locations is coordinated with lighting, air handling systems, fire extinguishing systems, etc., so that trays will not obstruct or impede system operation.
- Verify that horizontal ducting system, 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 ducting system 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 ducting system is located 15 cm (6 in.) to 30 cm (12 in.) above the T-bar and have clear vertical space.
- Verify that the horizontal ducting system have a minimum of 8 cm (3 in.) of clear vertical space from conduits, wires, and cables.
- Verify that the inside of a horizontal ducting system is free of burrs, sharp edges, or projections which can damage cable insulation.
- Verify that horizontal ducting system is not used to distribute telecommunications and power cables together.
- Verify that horizontal ducting system are not installed in ceiling areas (lock tiles, drywall or plaster) that are inaccessible..
- Verify the use of proper support for the horizontal ducting system by installing cantilever, trapeze and individual rod suspension brackets.
- Verify that supports are placed so that connections between sections of the horizontal ducting system 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 ducting system fills is not exceeding the manufactures listed capacity for the installed cable tray.
- Verify that metallic horizontal ducting system are bonded together and grounded to an approved ground source.
- Verify that square ducting system is marked and identified as specified by EIA TIA-606, “The Administration Standard for the Telecommunications Infrastructure of Commercial Buildings”.
- Verify that the ducting system enters the TC in such a way that it does not block or cover other equipment and cabling.
- Verify that the ducting system is secured mechanically or anchored so that movement does not occur during installation of cables.
- Verify that the square ducting system is readily accessible to technician and installer.
- Verify that the installed square ducting system allows for 20% expansion of the horizontal cabling system.
- Verify that the cable tray is not utilized to distribute both power and telecommunications cables together.
- Verify that dead end metal wireways are closed.
Standards Codes and References for Square “D” Ducting System Installation
1. EIA/TIA 569, Commercial Building Standard for Telecommunications Pathways and Spaces
2. NEC Issue 2008
3. SAES-T-916, Telecommunications Building Cable Systems
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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