Installing Premises Cabling System

1. Installing
PREMISES CABLING SYSTEM
1

2. Twisted Pair Installation Considerations
NEXT
Attenuation
Return Loss
PSNEXT
ELFEXT
2

3. Tensile Load/Installation Pull
3

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
4

5. Bend Radius
UTP STP
no less than 4x no less than
10x (multi-pair) 7.5cm (3”) non-plenum
15cm (6”) plenum
5

6. Compression
Correct
Incorrect
6

7. EMI
7

8. Optical Fiber Installation Considerations
NEXT
Attenuation
Return Loss
PSNEXT
ELFEXT
8

9. Optical Fiber Installation Guidelines
15/20x=pulling
10x=static
50lbs.
@700% greater than CAT5
9

10. Polarization
B A B A
Number 1
Number 2
A B A B
10

11. Cable Management - Rack Rear
11

12. Cable Management - Rack Front
12

13. Cable Management - “Towel Bar”
13

14. Cable Management - Cable Ties
14

15. Slack - Outlet
15

16. Slack - Rack
16

17. Horizontal Pathways
• Underfloor Duct
• Cellular Floor
• Conduit
• Raised/Access Floor
• Cable Trays and Wireways
• Ceiling Pathways
• Perimeter Pathways
• Furniture Pathways
17

18. Underfloor Duct
18

19. Cellular Floor
19

20. Conduit 1
20

21. Conduit 2
TC
1” 1-1/2”
1-1/2”
Pull Tape Innerduct
21

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
22

23. Raised/Access Floor
23

24. Ceiling Pathways
J J J J
(4-5 ft/1220-1525mm)
T T T T T T
11 ft/
3.4m
max
24

25. Cabling Installations in
Ceilings and Access Floors
25

26. Cable Trays & Wireways
Channel
Ladder
Solid-Bottom
Ventilated/Trough
Wireway
26

27. Furniture Pathways & Installation
27

28. Perimeter Pathways
28

29. Vertical Pathway Cabling Installations
3-bolt Clamp
(Shoe or Pulley)
D-Rings or Straps
Conduit Sleeve
Conduit Sleeve
(Firestop)
Strand
29

30. IDC and Color Coding
White/ Blue/ White/ Orange/ White/ Green/ White/ Brown/
Blue White Orange White Green White Brown White
Pair 1 Pair 2 Pair 3 Pair 4
25 pair Color Code
White Wires with predominant
5th pair = Slate Red family color are tip.
Black Wires with predominant
Yellow pair color are ring.
Violet
30

31. Interconnection Hardware Installation
31

32. Wiring Patterns
2 3
3 1 4 2 1 4
2 2 3 4 5 6 7 8 2 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
T568A T568B/
AT&T 258A
32

33. Wiring Patterns
Pin/Pair Assignment - T568A Pin/Pair Assignment - T568B
Pair 1, (Blue) Pair 1, (Blue)
Pair 2, (Orange) Pair 3, (Green)
Pair 3, (Green) Pair 4, (Brown) Pair 4, (Brown)
Pair 2, (Orange)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
33

34. T568A Wiring Pattern
Pin 1 White/Green
Pair 3
Pin 2 Green
Pin 3 White/Orange
Pin 4 Blue
Pair 2 Pair 1
Pin 5 White/Blue
Pin 6 Orange
Pin 7 White/Brown
Pair 4
Pin 8 Brown
34

35. T568B Wiring Pattern
Pin 1 White/Orange
Pair 2
Pin 2 Orange
Pin 3 White/Green
Pin 4 Blue
Pair 3 Pair 1
Pin 5 White/Blue
Pin 6 Green
Pin 7 White/Brown
Pair 4
Pin 8 Brown
35

36. Untwist and Jacket Removal
36