Horizontal cabling systems consist of two basic
- Horizontal Cable and Connecting Hardware (also
call "horizontal cabling") provide the means for
transporting telecommunications signals between
the telecommunications outlet/connector in the work area and
the horizontal cross-connect in the telecommunications closet.
These components are the "contents" of the horizontal
pathways and spaces.
- Horizontal Pathways and Spaces (also call "horizontal
distribution systems") are used to distribute and
support horizontal cable and connecting hardware
between the work area outlet and the telecommunications closet.
These pathways and spaces are the "container"
for the horizontal cabling.
Pathway and Cable Support
Cabling must be suspended from or attached to
the structural ceiling or walls with hardware or other installation
aids specifically designed to support their weight. Where building
codes permit telecommunications cables to be placed in suspended
ceiling spaces without conduit, open-top cable supports (J-supports)
may be used. When using J-supports, locate them on 48 inch centers
to adequately support and distribute the cable’s weight.
The pathways must:
- Have adequate support to withstand pulling
- Be installed with at least 3 inches of clear
vertical space above the ceiling tiles and support channels
(T-bars) to insure accessibility.
Do not allow horizontal pathways or cables to
rest directly on or be supported by ceiling panels, support channels
(T-bars), vertical supports, or other components of the suspended
ceiling. It is important to provide sufficient space between the
suspended ceiling structure and telecommunications cables to install,
maneuver, and store ceiling tiles during service.