Conduits Installation For Home Run Ceiling System

This article is about Conduits Installation For Home Run Ceiling System for Building Premises Distribution System of Telecommunication.

Conduits Installation For Home Run Ceiling System | Telecommunication

In a “Home Run” ceiling conduit system, verify that a continuous run of conduit from the work area oulet boxes to the TR is placed.
Verify that each home run conduit can serve from one to three oulet boxes, depending on the design and conduit size.
For conduits that serve one outlet boxes, ensure that an inside diameter of 1.9 cm. (¾ in.) or greater is required.
For conduits that serve two outlet boxes, ensure that an inside diameter of 2.5 cm (1 in.) or greater is required.
For conduits that serve three outlet boxes, ensure that an inside diameter of 3.2 cm (1¼ in.) or greater is required.
If the number of cables placed per conduit is one, ensure that the maximum conduit fills of 53% is not exceeded.
If the number of cables placed per conduit is two, ensure that the maximum conduit fills of 31% is not exceeded.
If the number of cables placed per conduit is three or more, ensure that the maximum conduit fills of 40% is not exceeded.
Verify that conduit runs contain no 90° condulets (also known as LB).
Ensure that conduit bends is long, sweeping bends and shall have a minimum bending radius of 10 – 15 times the internal conduit diameter.
Verify if a conduit run requires more than two 90° bends, a pull box between sections with 2 bends or less is provided.
Verify that conduit runs contain no continuous sections longer than 30 m (100 ft).
For conduit runs that total more than 30 m (100 ft) in length, ensure that pull points or pull boxes are inserted so that no segment between points/boxes exceeds the 30 m (100 ft) limit.
Verify that conduit do not runs through areas in which flammable material may be stored or handled (Hazardous Classified Area).
“Verify that conduit do not runs over or adjacent to:
– Boilers.
– Incinerators.
– Hot water lines.
– Steam lines.”
Bushings shall be placed on the ends of metallic conduit to protect cable sheaths from damage.
Verify that each conduit that enters a TC is reamed or bushed and terminated as close as possible to the wall where the backboard is mounted (to minimize the cable route inside the room).
“Ensure that all conduits are:
• Clean, dry, and unobstructed.
• Capped for protection.
• Labeled for identification and sealed to comply with firestop requirements. Equip all conduits (end to end) with a plastic or nylon pull line that has a minimum test rating of 90 kilograms (200 lbs). The end of each pull line shall be secured to avoid loosing the end section. “
Verify that ceiling conduits 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 the ceiling conduit runs have a minimum of 8 cm (3 in.) of clear vertical space from conduits, wires, and cables.
Verify that the ceiling conduit runs and cables are not resting directly on ceiling panels, framework (T-bars), vertical supports, or other components of the suspended ceiling.
Verify that the ceiling conduit runs is located 15 cm (6 in.) to 30 cm (12 in.) above the T-bar and have clear vertical space.