Huawei LampSite Installation Manual page 34

LampSite
Installation Guide
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Cable Binding
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Safety
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Requirements for Special Cables
Power cable
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PGND cable
Issue 02 (2014-05-27)
The bending radius of the 7/8" feeder and 5/4" feeder are greater than 250 mm and 380
mm, respectively.
The bending radius of the 1/4'' jumper, the 1/2'' softer jumper, and the 1/2'' common jumper
are greater than 35 mm, 50 mm, and 127 mm, respectively.
The bending radius of a power cable or a protection ground (PGND) cable is at least three
times the diameter of the cable.
The bending radius of an optical cable is at least 20 times the diameter of the optical cable,
and the minimum bending radius of the branch at each end of the optical cable is 30 mm.
The bending radius of an E1/T1 cable is at least three times the diameter of the cable.
The bending radius of an E1/T1 cable is at least five times the diameter of the cable.
Cables of the same type are bound together.
Different types of cables must be separately routed with a minimum spacing of 30 mm and
cannot be entangled or crossed.
The cables are bound tightly and neatly and the cable sheath is intact.
The cable ties face the same direction and all cable ties bound at similar positions must be
in a straight line.
The extra length of each indoor cable tie must be cut off. A slack of 5 mm is reserved for
each outdoor cable tie. All cut surfaces have no sharp edges.
Labels or nameplates are attached to both ends, joints, or turns of cables after they are
installed.
Cables are placed away from sharp objects or wall burrs. If these positions are inevitable,
protection pipes are required for the cables.
Cables are routed away from heat sources, or heat-insulation materials are added between
cables and heat sources.
A clearance is reserved at turns of a cable or the position close to a device, facilitating cable
and device maintenance. The recommended clearance is about 0.1 m.
Positions for routing power cables meet requirements of the engineering design.
If the length of a power cable is insufficient, the cable is replaced with a new one and no
joint or solder joint is allowed on the original cable.
Cables are routed only by qualified and trained personnel before all preparations are made.
Cables are routed in an untangled and orderly fashion.
If DC power cables need to be routed on the tower platform, the cables are routed along
the inner side of the guard rail and the distance between the guard rail and the cable is short.
If DC power cables need to be routed close to a device on the tower, the cables are secured
to the guard rail or pole with cable clips and the device cannot be far away from the position
for securing the cables.
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4 Installing an RHUB
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