AS NZS 14763.2:2020 Information technology一 Implementation and operation of customer premises cabling Part 2: Planning and installation (ISO/IEC 14763-2 (ED. 2.0) MOD).
Where separation between different cabling systems is required, this shall be maintained by physical barriers to prevent unintended change during installation or extensions to the installation.
Where separation between different cabling systems is required, it shall be maintained by physical separation to prevent accidental damage during installation or extensions to the installation. Pathway and pathway system capacity planning
Within pathway systems, the usable cross-sectional area is determined as follows:
a) for open or openable pathway systems and cable management systems (e.g. tray or basket), cables are not installed above the sidewalls;
b) bends in the pathway systems can restrict the usable cross-sectional area dependent upon the specified bend radii of the cable to be installed;
c) for pathway systems to which cables are to be attached or supported (e.g. messenger/catenary wires or designated routes), the cross-sectional area is the minimum available area surrounding the pathway system.
NOTE For pathway systems containing cables of a common diameter, the cross-sectional area can be considered to be the number of cables.
During initial planning, the cross-sectional area of the cables shall not exceed 40 % of the cross-sectional area of the pathway system at its most restrictive point. Recommendations Pathway and pathway system selection
For access providers, a minimum of two entrance pathways for access providers should be
provided, both of which should be
• located underground (aerial entrance pathways are not recommended because of their vulnerability due to physical exposure),
• physically separated, between the boundary of the premises and the point of entry into the building, by at least 20 m to ensure that a single incident will not cause damage to both entrance pathways.
The number of pathway systems required within each of the building entrance pathways depends on the number of access providers and the number and type of cables that the access providers will install. The entrance pathway systems should have adequate capacity to handle growth and additional access providers.
For generic cabling, it is recommended that the planning of pathways and the selection of pathway systems is undertaken using a structured approach and addressing each cabling sub-system in turn.
Additional pathway systems to support future installations should be considered where the cost of subsequent installation can be reduced.
Any maintenance holes, hand holes and closures within the pathways in unsecured areas should be protected against unauthorized access.
Pathway systems should be selected to ensure that water or other contaminant liquids cannot collect. The use of hidden pathways (such as within plastered wall surfaces) is not recommended but, if used, cabling should have either vertical or horizontal orientation.AS NZS 14763.2 pdf download.