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Category 3 cable, commonly known as Cat 3 or station wire, is an unshielded twisted pair (UTP) cable designed to reliably carry data up to 10 Mbit/s, with a possible bandwidth of 16 MHz. It is part of a family of copper cabling standards defined jointly by the Electronic Industries Alliance and the Telecommunications Industry Association.
Electrical Characteristics | ||||||||||
NO. | Item 100Pairs x 0.50mm Bare Copper | Unit | Value | |||||||
1 | Conducter DC Resistance +20ºC | Ω/km | Conductor diameter,mm | 0.5 | ||||||
Maximum | 95 | |||||||||
2 | DC Resistance Unbalance +20ºC | % | Average ≤ | 1.5 | ||||||
Maximum | 5 | |||||||||
3 | Insulation resistance +20ºC DC100-500V | MΩ·km | Minimum 10×10 3 | |||||||
4 | Dielectric Strength DC | KV | ||||||||
Applied voltage time | 3s | 1min | ||||||||
Conductor to Conductor | 2 | 1 | ||||||||
Conductor to Screen | 6 | 3 |
Attenuation +20ºC | dB/km | Conductor diameter,mm | 0.5 | |||||||
≥25Pairs cable:150kHz | Average ≤ | 9 | ||||||||
1024kHz | Average ≤ | 22.5 | ||||||||
8 | Near End Crosstalk1024kHz | 150KHz | dB | ≥52 | ||||||
Length ≥0.3km | 300KHz | ≥48 | ||||||||
1000KHz | ≥40 | |||||||||
9 | ELFEXT at 1km | 150KHz | dB | ≥58 | ||||||
300KHz | ≥52 | |||||||||
1000KHz | ≥42 | |||||||||
10 | PSNEXT | 150KHz | dB | ≥49 | ||||||
300KHz | ≥45 | |||||||||
1000KHz | ≥37 | |||||||||
11 | PSELFEXT at 1km | 150KHz | dB | ≥54 | ||||||
300KHz | ≥48 | |||||||||
1000KHz | ≥38 |
2 pair telephone cable