Ruijie Networks RG-N18010, Hardware Installation And Reference Manual

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Appendix D Cabling Recommendations in Installation
When RG-N18000 series switches are installed in standard 19-inch cabinets, route cable bundles upward or downward
along the sides of the rack depending on the actual situation in the equipment room. All cable connectors should be
placed at the bottom of the cabinet rather than be exposed outside of the cabinet. Power cords should be routed upward
or downward beside the cabinet 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
 Route and bundle power, signal, ground cables separately. When the cables are close to each other, cross them.
When power cables run parallel to signal cables, the distance between them must b
 All cable trays and their accessories shall be smooth and free from sharp edges.
 Holes in metal, through which cables pass shall have smooth, well-rounded surfaces or be protected with insulating
bushings.
 Use proper cable ties to bind cables together. Do not tie two or more cable ties to bind cables.
 Cut off excess cable tie cleanly with no sharp edges after bundling cables, as shown in Figure D-2.
Figure D-2 Cutting off Excess Cable Tie