l Drip loops must be made outside the feeder window, and the requirements for the minimum
bending radius are met.
l When cables are routed indoors, engineers are required indoors for cooperation.
l The feeder window must be waterproofed.
Outdoor Cabling Requirements
l Cables routed outdoors must be led through a pipe when they may be damaged.
l AC power cables, transmission cables, and cables buried in the ground must be protected.
l 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.
l 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.
l When routing RRU cables, ensure that the highest positions of the routes of all RRU cables
(except RF cables and AISG cables) must be lower than the bottom of the RRU.
l Cables are secured with cable clips.
l Cables are routed neatly along the specified cabling direction and secured with cable clips.
l 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.
l Cable clips must be vertical with cables, and the cables in a cable clip must be parallel.
l After routing cables neatly and correctly, tighten the screws on cable clips.
Secure cables on the cable tray, as shown in Figure 8-1.
RRU3942&RRU3642
Installation Guide 8 Installing RRU Cables
Issue 07 (2013-12-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
85
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