Hardware Installation and Reference Guide Appendix D Cabling Recommendations
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Appendix D Cabling Recommendations
When RG-S5750H 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
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