5.8.1 Cabling Overview
Basic Guidelines
To ensure optimal heat dissipation, do not block the air exhaust vents of PSUs.
● Lay out and bind cables of dierent types (such as power and signal cables)
separately. Cables of the same type must be in the same direction. Route
cables near each other in crossover mode. Ensure that the distance between
power cables and signal cables is greater than or equal to 30 mm (1.18 in.)
when you lay out the cables in parallel.
● If you cannot identify cables according to the cable labels, attach an
engineering label to each cable.
● Protect cables from burrs, heat sinks, and active accessories, which may
damage the insulation layers of cables.
● 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
o the excess lengths of the cable ties and ensure that
the cuts are neat and smooth.
● Ensure that cables are properly routed, supported, or xed within the cable
troughs inside the cabinet to prevent loose connections and cable damage.
● Coil any surplus lengths of cables and bind them to proper positions inside
the cabinet.
● Route cables straightly and bind them neatly. The bending radius of a cable
varies depending on the position where the cable is bent.
– If you need to bend a cable in its middle, the bending radius must be at
least twice the diameter of the cable.
– If you need to bend a cable at the output terminal of a connector, the
bending radius must be at least
ve times the cable diameter, and the
cable must be bound before bending.
● Do not use cable ties at a place where the cables are bent. Otherwise, the
cables may break.
Common Methods
The methods of routing cables inside a cabinet are described as follows:
● Determine overhead cabling and
underoor cabling for power cables based
on specic conditions of the equipment room. Specically, take into
consideration the AC power distribution frame (PDF), surge protector, and
terminal block.
● Determine overhead cabling and
underoor cabling for service data cables
based on specic conditions of the equipment room.
● Place the connectors of all service data cables at the bottom of the cabinet so
that the connectors are
dicult to reach.
TaiShan 200 Server
User Guide (Model 2280) 5 Install and Congure
Issue 04 (2020-01-16) Copyright © Huawei Technologies Co., Ltd. 56
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