5 installing premises cabling system

1

InstallingInstallingPREMISES CABLING SYSTEMPREMISES CABLING SYSTEM

2

Twisted Pair Installation Considerations

NEXTAttenuationReturn Loss

PSNEXTELFEXT

3

Tensile Load/Installation Pull

4

Tensile Load/Installation Pull Guidelines

• Limit 90º bends in conduit to 2• Cable should not be pulled through a length of

conduit exceeding 30m (100 ft)• Support cables every 4 - 5 ft (1200mm - 1500mm)• Avoid sharp objects, turns and corners• Use a pulley or a third man at turns and corners• Do not “jerk” cable• Pull around obstructions (HVAC) as required

5

Bend Radius

UTPno less than 4x

10x (multi-pair)

STPno less than

7.5cm (3”) non-plenum15cm (6”) plenum

6

Compression

Correct

Incorrect

7

EMI

8

Optical Fiber Installation Considerations

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PSNEXTELFEXT

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Optical Fiber Installation Guidelines

15/20x=pulling10x=static

50lbs.

@700% greater than CAT5

10

Polarization

B

AB

A

B

BA

ANumber 1

Number 2

11

Cable Management - Rack Rear

12

Cable Management - Rack Front

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Cable Management - “Towel Bar”

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Cable Management - Cable Ties

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Slack - Outlet

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Slack - Rack

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Horizontal Pathways

• Underfloor Duct• Cellular Floor• Conduit• Raised/Access Floor• Cable Trays and Wireways• Ceiling Pathways• Perimeter Pathways• Furniture Pathways

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Underfloor Duct

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Cellular Floor

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Conduit 1

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Conduit 2

TC

1”

1-1/2”

1-1/2”

InnerductPull Tape

22

Ducts and Conduit Guidelines

• Fiber and copper pulled in separate conduit− Use innerduct if in same conduit

• Clear internal obstructions, ream conduit ends, and use bushings• Pull all cable at same time, if possible• Use a partner at the entry point• Use lubricants if necessary (do not use petroleum-based)• Pull in a continuous manner without stopping• Do not pull a pull line through at the same time as the cable• Do not pull a terminated cable through the conduit• If pull boxes are used, pull to the first box, coil up the cable, then

feed it back into the pull box and then pull through to the next one

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Raised/Access Floor

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Ceiling Pathways

11 ft/3.4mmax

T TT T TT

J J J J(4-5 ft/1220-1525mm)

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Cabling Installations inCeilings and Access Floors

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Cable Trays & Wireways

ChannelLadder

Solid-BottomVentilated/Trough

Wireway

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Furniture Pathways & Installation

28

Perimeter Pathways

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Vertical Pathway Cabling Installations

Conduit Sleeve

Strand

3-bolt Clamp

(Shoe or Pulley)

Conduit Sleeve

D-Rings or Straps

(Firestop)

30

IDC and Color Coding

White/Blue

Blue/White

White/Orange

Orange/White

White/Green

Green/White

White/Brown

Brown/White

Pair 4Pair 1 Pair 2 Pair 3

25 pair Color Code

RedBlack

Violet

WhiteWhite

YellowYellow

Wires with predominant family color are tip.Wires with predominantpair color are ring.

5th pair = Slate

31

Interconnection Hardware Installation

32

Wiring Patterns

2 3 4 5 6 7 82

3 1 4

2

2 3 4 5 6 7 82

2 1 4

3

2 3 4 5 6 7 82

3 4

2

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

T568A T568B/AT&T 258A

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Wiring Patterns

Pin/Pair Assignment - T568A

1 2 3 4 5 6 7 8

Pair 2, (Orange)

Pair 3, (Green)

Pair 1, (Blue)

Pair 4, (Brown)

Pin/Pair Assignment - T568B

1 2 3 4 5 6 7 8

Pair 2, (Orange)

Pair 3, (Green)Pair 1, (Blue)

Pair 4, (Brown)

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T568A Wiring Pattern

White/GreenPin 1

Green

White/Orange

Blue

White/Blue

Orange

White/Brown

Brown

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pair 1

Pair 3

Pair 4

Pair 2

35

T568B Wiring Pattern

White/OrangePin 1

Orange

White/Green

Blue

White/Blue

Green

White/Brown

Brown

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pair 1

Pair 2

Pair 4

Pair 3

36

Untwist and Jacket Removal