Hardware Installation and Reference Guide Appendix
29
7.3 Cabling
During installation, route cable bundles upward or downward along the sides of the rack depending on the actual
situation in the equipment room. All cable connectors used for transit should be placed at the bottom of the
cabinet rather than be exposed outside of the cabinet. Power cords are routed beside the cabinet, and top
cabling or bottom cabling is adopted according to the actual situation in the equipment room, such as the
positions of the DC power distribution box, AC socket, or lightning protection box.
(1) Requirements for Cable Bend Radius
The bend radius of a fixed power cord, network cable, or flat cable should be over five times greater than
their respective diameters. The bend radius of these cables that are often bent or plugged should be over
seven times greater than their respective diameters.
The bend radius of a fixed common coaxial cable should be over seven times greater than its diameter. The
bend radius of the common coaxial cable that is often bent or plugged should be over 10 times greater than
its diameter.
The bend radius of a fixed high-speed cable (such as SFP+ cable) should be over five times greater than its
diameter. The bend radius of the fixed high-speed cable that is often bent or plugged should be over 10 times
greater than its diameter.
(2) Precautions for Bundling up Cables
Before cables are bundled, mark labels and stick the labels to cables wherever appropriate.
Cables should be neatly and properly bundled in the rack without twisting or bending.
Figure 7-4 Binding Cables
Cables of different types (such as power cords, signal cables, and ground cables) should be separated in
cabling and bundling. Mixed bundling is disallowed. When they are close to each other, you are advised to
adopt crossover cabling. In the case of parallel cabling, maintain a minimum distance of 30 mm (1.18 in.)
between power cords and signal cables.
The cable management brackets and cabling troughs inside and outside the cabinet should be smooth
without sharp corners.
The metal hole traversed by cables should have a smooth and fully rounding surface or an insulated lining.
Use cable ties to bundle up cables properly. Please do not connect two or more cable ties to bundle up cables.
To Next Page
Loading...
Need help?
General
