Huawei RRU3269 Installation Manual page 99

RRU3269
Installation Guide
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Indoor cabling requirements
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Outdoor Cabling Requirements
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Issue Draft B (2018-05-15)
Reserve a proper distance (0.1 m or 3.937 in. is recommended) between equipment and
cables especially at the cable curves to protect the cables and equipment.
Route each cable into the room through the feeder window.
Reserve drip loops for all cables outside the feeder window before routing them into the
room. Ensure that the radiuses of the drip loops are greater than or equal to the minimum
bending radiuses of the cables.
When routing a cable into the room, ensure that a person is assisting you in the room.
Apply waterproof treatment to the feeder window.
After being connected to a ground clip on power cables, a ground cable must be routed
downwards to prevent water from entering the equipment to which the power cables
connect.
Protect outdoor cables against potential damage. For example, put the cables through
tubes.
The cables to be protected include AC power cables, transmission cables, and cables laid
out underground.
When routing cables through tubes on the ground below the cabinet, put a 30 mm to 50
mm (1.18 in. to 1.97 in.) length of the tubes into the base of the cabinet but do not put the
tubes into the cabinet. Use waterproof tape or waterproof silicon gel to block both ends
of the tubes and use sheet metal tabs to secure the tubes to the cable holes in the base.
When routing cables through tubes along a metal cable trough below the cabinet, do not
put the tubes into the base of the cabinet but cover the cable trough and connect the tubes
to the cable holes in the base.
When routing RRU cables, ensure that the highest positions of the routes of all RRU
cables (except RF cables and AISG cables) are lower than the bottom of the RRU to
prevent water from entering the maintenance cavity of the RRU.
Use clips to secure cables outdoors. For the method of installing a clip, see the
installation guide delivered with the clip.
Arrange cables neatly along the routing direction and use clips to secure the cables.
Determine the positions where the clips are installed according to the actual situation.
For example, 7/8" feeders are secured with clips at an interval of 1.5 m to 2 m (4.92 ft to
6.56 ft), CPRIIr fiber optic cables and power cables are secured with clips at an interval
of 1 m to 1.5 m (3.28 ft to 4.92 ft). Ensure that the clips are evenly spaced and in the
same direction.
When fastening cables with a clip, ensure that the cables are aligned neatly and are
routed through the holes in the clip. Do not stretch the cables too tightly.
There are two types of clips: 3-hole clip and 6-hole clip, which are described as follows:
 A 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders.
 A 6-hole clip is shown by illustration b in the following figure. It is often used to fasten power cables
and CPRIIr fiber optic cables.
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9 Installing RRU Cables
91