3.5.8 Laying Out Cables
Basic Rules
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Lay out and bind cables of different types (such as power and signal cables) separately.
Ensure that the distance between power cables and signal cables is longer than or equal
to 30 mm (1.18 in.) when you lay out the cables in parallel.
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Lay out cables of the same type in the same direction. Cables near each other can be
routed in crossover mode.
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If you cannot identify cables using the cable labels, attach an engineering label to each
cable.
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Protect cables from burrs, heat sinks, and active accessories, which may damage the
insulation layers of cables.
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Ensure that the length of cable ties for binding cables is appropriate. Do not connect two
or more cable ties together for binding cables. After binding cables properly, trim off the
excess lengths of the cable ties and ensure that the cuts are neat and smooth.
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Ensure that cables are properly routed, supported, or fixed within the cable troughs
inside the cabinet to prevent loose connections and cable damage.
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Coil any surplus lengths of cables and bind them to proper positions inside the cabinet.
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Route cables straightly and bind them neatly. The bending radius of a cable varies with
the position where the cable is bent.
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If you need to bend a cable in its middle, the bending radius must be at least twice
the diameter of the cable.
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If you need to bend a cable at the output terminal of a connector, the bending radius
must be at least five times the cable diameter, and the cable must be bound before
bending.
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Do not use cable ties at a place where the cables are bent. Otherwise, the cables
may break.
Common Cable Routing Methods
The methods of routing cables inside a cabinet are described as follows:
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Determine overhead cabling and underfloor cabling for power cables based on specific
conditions of the equipment room. For example, take into consideration the AC PDF,
surge protector, and terminal block.
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Determine overhead cabling and underfloor cabling for service data cables based on
specific conditions of the equipment room.
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Place the connectors of all service data cables at the bottom of the cabinet in order so
that the connectors are difficult to reach.
Cable Routing Rules
To ensure optimal heat dissipation, do not block the air exhaust vents of PSUs.
RH2288 V3 Server
User Guide
3 Installing and Removing the Server
Issue 32 (2019-03-28)
Copyright © Huawei Technologies Co., Ltd.
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