Appendix C - Cabling - Ruijie RG-PF2920 Series Hardware Installation And Reference Manual

Hardware Installation and Reference Guide
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Appendix C — Cabling
When the RG-PF2920 is installed in a standard 19-inch cabinet, route cable bundles upward
or downward alongside the rack depending on the actual situation in the equipment room. All
cable connectors should be placed at the bottom of the cabinet, and cannot be exposed outside.
Power cords should be routed upward or downward alongside the cabinet, near the DC power
distribution cabinet, AC power outlet, or surge protection box.
8.1 Requirements for the 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.
8.2 Requirements for the Minimum Bend Radius of an Optical
Fiber

The diameter of a fiber tray to hold fibers should be over 25 times greater than the diameter
of the fiber.

When an optical fiber is moved, the bend radius of the fiber should be over 20 times greater
than the diameter of the fiber.

During cabling of an optical fiber, the bend radius of the fiber should be over 10 times greater
than the diameter of the fiber.
8.3 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.
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Appendix C — Cabling