Ruijie RG-NBS5200 Series Switches Hardware Installation and Reference Guide
Appendix D Cabling Recommendations
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Appendix D Cabling Recommendations
When RG-NBS5200 series switches are installed in standard 19-inch racks, route cable bundles upward or downward
along the sides of the rack depends on the actual situation in the equipment room. All cable connectors should be placed
at the bottom of the rack rather than be exposed outside of the cabinet. Power cords should be routed upward or
downward beside the rack close to the location of the DC power distribution cabinet, AC power outlet, or lightning
protection box.
Required Minimum Cable Bend Radius
The minimum bend radius of a power, communication or flat cable should be 5 times the overall diameter of the
cable. If the cable is constantly bent, plugged or unplugged, the bend radius should be 7 times the overall diameter.
The minimum bend radius of a coaxial cable should be 7 times the overall diameter of the cable. If the cable is
constantly bent, plugged or unplugged, the bend radius should be 10 times the overall diameter.
The minimum bend radius of a high-speed cable, such as an SFP+ cable should be 5 times the overall diameter of
the cable. If the cable is constantly bent, plugged or unplugged, the bend radius should be 10 times the overall
diameter.
Required Minimum Fiber Bend Radius
The diameter of a fiber tray to hold fibers cannot be less than 25 times the diameter of the fiber.
When moving an optical fiber, the bend radius of the fiber should be equal to or greater than 20 times the diameter of
the fiber.
During cabling of an optical fiber, the bend radius of the fiber should be equal to or greater than 10 times the
diameter of the fiber.
Precautions for Cable Bundling
Before bundling cables, correctly mark labels and stick the labels to cables where appropriate.
Cables should be neatly and properly bundled, as shown in Figure D-1.
Figure D-1 Bundling Cables
