RRU3269
Installation Guide
9 Installing RRU Cables
Issue Draft B (2018-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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9.11 Installing an RRU power cable
This section describes the procedure for installing an RRU power cable.
9.12 Closing the Cover Plate of an RRU Cabling Cavity
This section describes the procedure for closing the cover plate of an RRU cabling cavity.
9.1 Cabling Requirements
Cables must be laid out according to the specified cabling requirements to prevent signal
interference.
If a cable listed below is not required, skip the cabling requirements of the cable.
General Cabling Requirements
Bending radius requirements
The bending radius of a 7/8'' feeder must be greater than 250 mm (9.84 in.), and the
bending radius of a 5/4'' feeder must be greater than 380 mm (14.96 in.).
The bending radius of a 1/4'' jumper must be greater than 35 mm (1.38 in.). The bending
radius of a super-flexible 1/2'' jumper must be greater than 50 mm (1.97 in.), and the
bending radius of an ordinary 1/2'' jumper must be greater than 127 mm (5 in.).
The bending radius of a power cable or PGND cable must be at least three times its
diameter.
The bending radius of a fiber optic cable is at least 20 times of its diameter, and the
bending radius of a breakout cable is at least 30 mm (1.18 in.).
The bending radius of an E1/T1 cable must be at least three times its diameter.
The bending radius of a signal cable must be at least five times its diameter.
Cable binding requirements
Cables of the same type must be bound together.
Different types of cables must be separately laid out and bound, with a minimum
distance of 30 mm (1.18 in.) from each other.
The cables must be bound tightly and neatly. The sheaths of the cables must not be
damaged.
The cable ties must face the same direction, and those at the same horizontal line must be
in a straight line.
The excess of the indoor cable ties is cut off. The excess of 5 mm (0.197 in.) of the
outdoor cable ties is reserved, and the cut surfaces are smooth without sharp edges.
After cables are installed, labels or nameplates must be attached to the cables at their
ends, curves, and interconnection positions.
Security requirements
When routing cables, avoid sharp objects, for example sharp edges on the wall. If
necessary, use tubes to protect the cables.
When routing cables, keep the cables away from heat sources and use heat insulation
materials to insulate the cables from the heat sources.
