H3C Technologies H3C S12500-X Series Switches - Manual (Page 150)

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Cable management guidelines
When you route and bundle up cables, follow these guidelines:
• Bind and route the cables neatly inside the rack, and make sure they are not kinked or bent.
Figure 94 Correct and incorrect cable binding
• The cable bend radius at connectors must be a minimum of 5 times the cable diameter, and must
be a minimum of twice the cable diameter away from the connectors.
• Route different types of cables (for example, power cords and signal cables) separately. If they are
close to one another, cross them over one another. If you route them in parallel, make sure the space
between a power cord bundle and a signal cable bundle is a minimum of 30 mm (1.18 in).
• The cable management brackets and cable routing slots, inside or outside the rack, are smooth and
have no sharp edges or tips.
• When you route cables through sharp sheet metal penetration points or along sharp edges of
mechanical parts, use bushings or take any other action to protect the cables from being cut or
abraded. The sheet metal penetration points must be smooth and fully rounded.
• Use the correct type of ties to bind the cables. Do not bind cables with joined ties. The following
types of ties are available: 100 × 2.5 mm (3.94 × 0.10 in), 150 × 3.6 mm (5.91 × 0.14 in), 300 ×
3.6 mm (11.81 × 0.14 in), 530 × 9 mm (20.87 × 0.35 in), and 580 × 13 mm (22.83 × 0.51 in).
• After binding the cables, cut the excess from the ties, leaving no sharp or angular tips. See Figure
95 .
Figure 95 Cutting cable ties