2 structured cabling system

8/7/2019 2 Structured Cabling system

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STRUCTURED CABLING(SC)


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1. What is Structured Cabling (SC) ?

Organizing the cabling system by :a. Installing ONLY EIA/TIA standard certified

Network components.

b. Following installation guidelines.

c. Documenting the cabling system / layout.

2. Whydo we need SC?

We need SC to have Network reliability. We need SC to improve the performance of

the Network.


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3. Thebasis features of SC

Reliability.

Flexibility: Facilitates easy changes and

moves. Low cost of change.

Building Asset.

Long term investment protection.


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4. Installation guidelines.

Check the routing for the cable ensuring

hazardous areas are avoided.

90 Mts is the maximum length of the

horizontal UTP cable between patch panel

and the I/O.

Cables must be supported along its length by

cleats, cable trays, conduits etc. Loose layingin false ceiling is NOT recommended.


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UTP cables must NOT be exposed to outside

weather. They are strictly for Internal buildingwiring.

Segregation from electrical services is of

maximum importance. Advice must be sought

from the electrical department and cabling

system should be designed accordingly.

(There are no real standard for this.)

Minimum separation of Pathways fromelectrical lines are given below.


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Minimum Separation Distance

Condition

< 2 KVA 2 - 5 KVA > 5 KVA

Unshielded Power Lines or

electrical equipment in proximity

to open or non-metal pathways.

127 mm /

5 inches

305 mm /

12 inches

610 mm /

24 inches

Unshielded Power Lines or

electrical equipment in proximity

to a grounded metal pathways.

64 mm /

2.5 inches

152 mm /

6 inches

305 mm /

12 inches

Power Lines enclosed in a

grounded metal conduit or

equivalent shielding)in proximity

to a grounded metal pathways.

------- 76 mm /

3 inches

152 mm /

6 inches


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Allow 30% free space in cable trays and

conduits that will facilitate replacement of

cables without stressing the cable.

Remember that when using conduit pipes the

bends will limit the number of cables that can

be drawn through it. Never install Data Cables with electrical

panels, systems under any circumstances.

Do not allow the cables to KINK or exceed 90degree bends or the bend radius of the cable.

Do not stress the cable, over tighten, tie, wrap

or use poorly designed support system.


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Keep the pair twists within 13mm of thetermination and ensure the twists are tight.

Maintain the cable sheath as close aspossible to the termination.

When stripping the cable sheath, ensure thatthe conductors or the conductor sheaths arenot damaged.

Document and Label both ends of each UTPcable, all I/Os and each port of Patch Panels.

In cabinet and termination points all cablesmust be dressed and be of neat appearance.

On completion of the installation anddocumentation, go for Network Audittestin .


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The changes in the Network layout must be

updated when ever there are any changes.

The performance and integrity of the systemwill be as good as the quality of the

installation.

Avoid CRIMP

ING RJ45

Connectors andcrimpedpatchcords.If you have to do it to

meet emergency situations, use a standard

Branded Crimping Tool and RJ45 connectors

from well know brands. (AMP / Dlink etc)Hand crimped cables may be used for

temporary connections and must be replaced

at the earliest.

2 structured cabling system

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