Installation Manual
9. Appendix C Cabling Recommendations in Installation
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9
APPENDIX C CABLING RECOMMENDATIONS IN INSTALLATION
When the switches are installed in standard 19-inch cabinets, the cables are tied in the binding
rack on the cabinet by the cable management bracket, and top cabling or bottom cabling is
adopted according to the actual situation in the equipment room. All cable connectors should
be placed at the bottom of the cabinet in an orderly manner instead of outside the cabinet easy
to touch. Power cables 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 position of the DC
power distribution box, AC socket, or lightning protection box.
Requirement for the Minimum Cable Bend Radius
❖
The bend radius of a power cord, communication cable, and flat cable should be over five
times greater than their respective diameters. The bend radius of these cables that often
bend or suffer removal/insertion should be over seven times greater than their respective
diameters.
❖
After cabling is fixed, the bend radius of a common coaxial cable should be over seven times
greater than its diameter. The bend radius of this type of cables that often bend or suffer
removal/insertion should be over 10 times greater than its diameter.
❖
The bend radius of a high-speed cable (SFP+ cable, for example) should be over five times
greater than its diameter. The bend radius of this type of cables that often bend or suffer
removal/insertion should be over 10 times greater than its diameter.
Requirement for the Minimum Fiber Bend Radius
❖
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.
Precautions for Bundling up Cables
❖
Before cables are bundled, correctly mark labels and stick the labels to cables wherever
appropriate.
❖
Cables should be neatly and properly bundled, and no twisting or bending is allowed, as
shown in Figure C-1.
Figure C-1 Bundling up cables (1)
