Huawei DBS3900 Installation Manual page 90

RRU3260
Installation Guide
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Indoor Cabling Requirements
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Outdoor Cabling Requirements
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Secure cables on the cable tray, as shown in
Issue 05 (2014-06-30)
Cables must be routed away from heat sources, or heat-insulation materials are added
between cables and heat sources.
Sufficient slack (recommended for about 0.1 m [0.33 ft]) is provided in cables at turns or
the position close to a device, facilitating cable and device maintenance.
Cables are routed indoors through the feeder window.
Drip loops must be made outside the feeder window, and the requirements for the
minimum bending radius are met.
When cables are routed indoors, engineers are required indoors for cooperation.
The feeder window must be waterproofed.
Cables routed outdoors must be led through a pipe when they may be damaged.
AC power cables, transmission cables, and cables buried in the ground must be
protected.
If cables at the cabinet bottom need to be routed through a pipe along the ground, lead
the pipe into the cabinet base for about 30 mm (1.18 in.) to 50 mm (1.97 in.), not into the
cabinet. Block the pipe with waterproof tape or silicon gel, and secure the pipe to the
cable hole at the cabinet bottom with metal piece.
If cables at the cabinet bottom need to be routed through a pipe along the metal cable
trough, do not lead the pipe into the cabinet base. The cable trough must be sealed and
routed through the cable hole at the cabinet bottom.
When routing RU cables, ensure that the highest positions of the routes of all RU cables
(except RF cables and AISG cables) must be lower than the bottom of the RU.
Cables are secured with cable clips.
Cables are routed neatly along the specified cabling direction and secured with cable
clips.
The positions for cable clips are determined onsite. For example, the cable clips for the
7/8" feeder are installed at the spacing of 1.5 m (4.92 ft) to 2 m (6.56 ft) in the same
direction, and the cable clips for the power cables are installed at the spacing of 1.5 m
(4.92 ft) to 2 m (6.56 ft) in the same direction.
Cable clips must be vertical with cables, and the cables in a cable clip must be parallel.
After routing cables neatly and correctly, tighten the screws on cable clips.
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Figure 9-1.
9 Installing RU Cables
82