By Bob Catanzarite
swhowto.com

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Structured
Wiring
Concept

What Do
You Want?

Planning 
Chapter 1

Planning 
Chapter 2


Buying Tools
Chapter 1


Buying Tools
Chapter 2

The Rough-In
Chapter 1

The Rough-In
Chapter 2

The Central Wiring Panel
Chapter 1

The Central Wiring Panel
Chapter2

Finishing

Coax Stripping

Coax Terminating

Compensate for
Video Losses

CATx Stripping
and Terminating
Chapter 1

CATx Stripping
and Terminating
Chapter 2

Home Network
Wiring and Setup
Chapter 1

Home Network
Wiring and Setup
Chapter 2

Home Network
Wiring and Setup
Chapter 3

Home Network
Wiring and Setup
Chapter 4

NEW!
VOIP (Voice Over Internet Protocol)

Wireless
Networks
Chapter 1

Wireless
Networks
Chapter 2

Pull Cords

Wiring Diagrams

More Photos

Reference

Links

Contact Me

Extra's

 

 

  2001
Bob Catanzarite

 

 

 

 

 

Reference Information

 

Guidelines for Minimum Spacing - Telecommunications Wiring and Other Wiring Types

When crossing structured cabling and AC power do so at 90
Maximum length for CATx cables is 100 meters (328 ft)
Transformer Clearance 40"


NOTE: There are widely differing recommendations available for the figures shown above. These are MY recommendations based on a  balance between the manufacturers recommendations and what is reasonable and practical (especially in a home installation). Belden, for example, lists the minimum bend radius for one of the RG6/U Quad Shielded coax that I used as 3" minimum radius or 6" diameter. This is somewhat less that the diameter of a basketball.  You'll be hard pressed to install your own cabling without bending the coax less that 6" diameter. The point is that if you exceed the manufacturers recommendation you may not get the full performance that they advertise. Exceed these recommendations at your own risk. I did and my wiring system works fine. Bottom Line - Minimize bends in your cables - Avoid tight bends!

 

dB Chart

GAIN

LOSS

dB GAIN Power
Ratio
Voltage
Ratio
dB LOSS Power
Ratio
Voltage
Ratio
           
0 1.00 1.00 0 1.000 1.00
0.5 1.12 1.06 -0.5 0.891 0.944
1 1.26 1.12 -1 0.794 0.891
1.5 1.41 1.19 -1.5 0.708 0.841
2 1.58 1.26 -2 0.631 0.794
3 2.00 1.41 -3 0.501 0.708
3.5 2.24 1.50 -3.5 0.447 0.668
4 2.51 1.58 -4 0.398 0.631
5 3.16 1.78 -5 0.316 0.562
6 3.98 2.00 -6 0.251 0.501
7 5.01 2.24 -7 0.200 0.447
8 6.31 2.51 -8 0.158 0.398
9 7.94 2.82 -9 0.126 0.355
10 10.00 3.16 -10 0.100 0.316
11 12.59 3.55 -11 0.079 0.282
15 31.62 5.62 -15 0.032 0.178
20 100.00 10.00 -20 0.010 0.100
25 316.23 17.78 -25 0.003162 0.0562
30 1,000 31.62 -30 0.001000 0.0316
35 3,162 56.23 -35 0.000316 0.0178
40 10,000 100.00 -40 0.000100 0.0100
45 31,623 177.83 -45 0.000032 0.00562
50 100,000 316.23 -50 0.00001000 0.00316
55 316,228 562.34 -55 0.00000316 0.00178
60 1,000,000 1,000 -60 0.00000100 0.00100
65 3,162,278 1,778 -65 0.00000032 0.000562
70 10,000,000 3,162 -70 0.0000001000 0.000316
75 31,622,777 5,623 -75 0.0000000316 0.000178
80 100,000,000 10,000 -80 0.0000000100 0.000100
85 316,227,766 17,783 -85 0.0000000032 0.0000562
90 1,000,000,000 31,623 -90 0.00000000100 0.0000316
95 3,162,277,660 56,234 -95 0.00000000032 0.0000178
100 10,000,000,000 100,000 -100 0.000000000100 0.0000100
105 31,622,776,602 177,828 -105 0.000000000032 0.00000562
110 100,000,000,000 316,228 -110 0.0000000000100 0.00000316

 

 

CATx Cable Specifications
EIA/TIA Proposed Specs
Specification Category 5
Category 5E
Category 6
(Proposed)
Frequency Range 1-100 MHz 1-100 MHz 1-200 MHz (250?)
Attenuation 24 dB 24 dB 21.7 dB
NEXT 27.1 dB 30.1 dB 39.9 dB
Power sum NEXT N/A* 27.1 dB 37.1 dB
ACR 3.1 dB 6.1 dB 18.2 dB
Power sum ACR N/A* 3.1 dB 15.4 dB
ELFEXT 17 dB* 17.4 dB 23.2 dB
Power sum ELFEXT 14.4 dB* 14.4 dB 20.2 dB
Return Loss 8 dB* 10 dB 12.0 dB
Propagation Delay 548 ns* 548 ns 548 ns
Delay Skew 50 ns* 50 ns 50 ns

 

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