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Structured
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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
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Extra's
© 2001
Bob Catanzarite
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Reference Information Guidelines for Minimum Spacing
- Telecommunications Wiring and Other Wiring Types 
When crossing structured cabling and AC power do so
at 90º
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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