Specifications

Cable duct
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724-746-5500 • blackbox.com
Structured Cabling System
Cellular floor. These are preformed, steel-lined
cells buried in 75-mm (3-in.) reinforced concrete.
They come with preset fittings and large capacity
header ducts.
Trench duct. This solid tray has compartments and
a flat top, and is embedded flush with the concrete.
Access floor. This consists of modular floor panels
supported by pedestals. It’s commonly used in
computer and equipment rooms.
Conduit. There are different types of conduit:
metallic tubing, rigid metal, and rigid PVC. Use
conduit when your telecommunications outlets are
considered permanent, device density is low, and
future changes are not a consideration. Conduit must
meet the appropriate electrical codes. It should not
be longer than 30 meters (98.4 ft.) nor contain more
than two 90-degree bends between pull points.
Cable trays. Options include prefabricated
channel, ladder, solid bottom, ventilated, and wire
trays. Trays can be located above or below the ceiling.
Ceiling pathways. This is one of the most popular
methods of routing cable. Bundled cables run on
J-hooks suspended above a plenum ceiling. The
cables are then fanned out through the walls,
support columns, or power poles to the work area
outlet. Cables must be supported and must not be
run directly on the ceiling tiles.
Perimeter raceways. These include plastic or
metal surface, recessed, multichannel, and molded
raceways. Use them in areas where devices can
be reached from the walls at convenient levels.
Fill capacity should be no more than 20–40%,
depending on the cable.
Power considerations.
Make sure your telecommunications cables and
power cables are separated. Also check your local
codes. Some allow the two cables to be run in the
same raceway (with a barrier), while others do not.
Consider sources of EMI/RFI and be sure to use surge
protection equipment.
Other pathways.
Please refer to the standard for recommendations
for work area and telecommunications outlet
pathways.
Perimeter raceway
Cable tray
Cable raceway