Huawei DBS3900 Installation Manual page 195

DBS3900 LampSite
Installation Guide
General Cabling Requirements
Bending radius requirements
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Cable binding requirements
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Security requirements
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Indoor cabling requirements
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Outdoor Cabling Requirements
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Issue 08 (2016-05-30)
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 (5.00 in.).
The bending radius of a PGND cable must be at least three times its diameter.
The bending radius of a signal cable must be at least five times its diameter.
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.
Cables must be bound tightly and neatly. The sheaths of cables must not be damaged.
Cable ties must face the same direction, and those at the same horizontal line must be in
a straight line.
The excess of indoor cable ties must be cut off. The excess of 5 mm (0.197 in.) of
outdoor cable ties should be reserved, and the cut surfaces must be smooth without sharp
edges.
After cables are installed, labels or nameplates must be attached to the cables at their
ends, curves, and interconnection positions.
When laying out cables, avoid sharp objects, for example sharp edges on the wall. If
necessary, use tubes to protect the cables.
When laying out cables, keep cables away from heat sources, or use heat insulation
materials to insulate the cables from the heat sources.
Reserve a proper distance (0.1 m [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.
Protect outdoor cables against potential damage. For example, thread the cables through
tubes.
Cables to be protected include AC power cables, transmission cables, and cables laid out
underground.
Use cable clips to secure cables outdoors.
Arrange cables neatly along the routing direction and use cable clips to secure the cables.
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