AS/NZS 3084:2017 pdf free.Telecommunications installations – Telecommunications pathways and spaces for commercial buildings.
7.4.6 Cable support
Where telecommunications cables are placed loosely in the ceiling on open-top cable supports located on 1200mm to 1500 mm centres and where larger quantities of cables (50 to 75 cables) are bunched together in the ceiling in a congested area, such as close to the telecommunications room, special supports shall be designed and installed to carry the additional weighi
7.5 CONDUIT SYSTEMS AND CABLE DUCTING SYSTEMS
7.5.1 Application
The use of a conduit System or a cable ducting system as a horizontal pathway system for
telecommunication cabling is only considered in any of the following circumstances:
(a) It is required by local regulations.
(b) It is required to meet building occupant requirements for security and tamper prevention.
(c) Outlet locations arc permanent.
(d) Device densities are low.
(e) Flexibility is not required.
In-floor conduit systems arc especially inflexible when buried in concrete. hut may provide a solution for distribution installed during renovation of historic buildings with wooden timber beam structure and timber floor surface construction if ceiling spaces or wall cavities are not available.
7.5.2 Conduit design considerations
7.5.2.1 General
In addition to the requirements of referenced standards, the following should be considered.
7.5.2.2 Conduit fill
Conduit fill factor comprising Ithe sum of cable cross sectional areasj/[conduit inner cross sectional area] shall not exceed the requirements of AS/NZS ISOIEC 14763.2 for straight conduit runs. For a new installation this should be 24% (comprising 40% ultimate fill less 40% of this as spare capacity).
The conduit nIl factor shall be reduced by 6% fill per 900 sweeping bend in any run between draw access points.
Where an earth or SELV d.c. power cable or blown fibre tube assembly is installed in a conduit with other telecommunications cables it shall (for the purposes of determining the required conduit diameter) be regarded as another telecommunications cable of equal physical size. The required conduit dimension may then be determined by calculating the resulting fill factor.
7.5.2.3 Conduit in ha:ardous locations
Where a telecommunications conduit is to be placed in a hazardous location, such as an explosive or combustible atmosphere as defined in ASNZS 60079.10, the conduit shall be designed and installed to the requirements of AS/NZS 60079.14 (and in Australia AS/CA S009).
7.5.2.4 !Iori:on tat distribution conduits
Any single conduit run extending from a telecommunications room shall not serve more than three outlet boxes. Conduits should be incrementally increased in size from the furthest outlet box toward the telecommunications room.AS/NZS 3084 pdf download.