Huawei DBS3900 Installation Manual page 127

DBS3900 LampSite
Installation Guide
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International Standards
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Bending radius
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Cable binding
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Safety
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Requirements for Special Cables
Ethernet Cable
Issue 06 (2015-10-30)
Technical Specification for Construction and Acceptance of Telecommunication Conduit
Engineering (GB 50374-2006)
Generic Cabling for Customer Premises (ISO/IEC 11801)
Commercial Building Telecommunications Cabling Standard (EIA/TIA 568)
Commercial Building Standard for Telecommunication Pathways and Spaces (EIA/TIA
569)
Administration Standard for Commercial Telecommunications Infrastructure (EIA/TIA
606)
Grounding and Bonding Requirements for Telecommunications in Commercial
Buildings (EIA/TIA 607)
Generic Cabling Systems for Information Technology (EN 50173)
Cabling Installation for Information Technology (EN 50174)
The bending radius of a 1/4'' jumper, a 1/2'' softer jumper, and a 1/2'' common jumper
must be longer than 35 mm, 50 mm, and 127 mm, respectively.
The bending radius of a power cable is at least five times the diameter of the cable.
The bending radius of a signal cable must be 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.
The cables are bound tightly and neatly and the sheaths of the cables 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 before the extra length is cut off. All cut surfaces are without
sharp edges.
Labels or nameplates are attached to both ends, joints, or turns of cables after they are
installed.
The steel pipe or fire-resistant rigid polyvinyl chloride pipe should be used for the cable
duct or for routing cables. The cross-sectional usage of the cable duct should be 30% to
50% and that of the pipe for routing cables should be 25% to 30%.
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.
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8 Installing a pRRU3902
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