Cable Management Guidelines - HP FlexFabric 12900 series Installation Manual

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 76 Correct and incorrect cable binding
• The cable bend radius at connectors must be at least 5 times the cable diameter, and must be at
least twice the cable diameter away from the connectors.
Route different types of cables (for example, power cables and signal cables) separately. If they are
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close to one another, cross them over one another. If you route them in parallel, make sure the space
between a power cable bundle and a signal cable bundle is at least 30 mm (1.18 in).
The cable management brackets and cable routing slots, inside or outside the rack, are smooth and
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have no sharp edges or tips.
When you route cables through sharp sheet metal penetration points or along sharp edges of
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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
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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 (1 1.81 × 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
77.
Figure 77 Cutting cable ties
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Figure