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Cable Routing and Binding
This section describes the general methods and requirements for cable routing and binding.
Cable Routing
- In an equipment room installed with supports and ESD floor, cables can go through the interlayer (the space between the concrete floor and the ESD floor) or the cable trough.
- If the cables are led out from the top of the cabinet, a cable tray should be built over the cabinet. Use cable ties to fix the PDU cables in the cabinet, to prevent PDU connectors loosening due to gravity of cables.
- The specifications, routing, section, and position for arranging the cables should be designed beforehand. The cables should be lined up neatly, without any damage on the cover.
- Signal cables, such as the alarm cables, network cables, and clock cables must be routed separately from power cables.
- The cable should be turned smoothly at the bends, with the minimum bend radius no less than three times the diameter of the cable.
- The insulation layer of the conducting wire must be intact.
- The cables should be routed in a way that facilitates future maintenance and expansion.
Cable Binding
- Bind the cables when laying them on the passage. The cables should be aligned snugly together. The spacing between the cable ties should be even with a neat overall appearance.
- Cables run through the ducts do not need to be bound but should be arranged neatly without crossover. The cable should not overflow the trough. Bind or attach the cables with ties where they enter or exit the trough and at turning points.
- The bundles should be tidy and their purpose clear. The bundles can be classified by type. A large number of cables can be further classified by column. Bind each group of cables with ties.
- Do not connect two or more cable ties to bind cables, because this may decrease the strength of the binding.
- Bind the cables neatly and trim the excessive tie.
- The cable ties should be evenly spaced three to four times the diameter of the cable bundle.
- Use as long a bend radius as possible to prevent internal cable stress and breakage.
Figure 7-21 shows how to bind cables.
1. Cable tie placed incorrectly (at the bend) |
2. Cable ties correctly placed |
3. Cable tie loose |
4. Cable tie not trimmed |
5. Cable tie correctly trimmed |
6. Space cable ties three or four times the diameter of the bundle |
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