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名称：telephone cable |
Multipair cables
BC/PE / LAP /FIG.8/PE 10/20pairs0.5mm
Cable Construction
1. Conductor : 99.9% pure annealed copper
Diameter of wire : 0.50mm
Tolerance : ± 0.01 mm
2. Insulation : PE
Diameter of Insulation : 0.90mm
Tolerance : ± 0.02 mm
Nominal thickness : 0.2mm
3 Twisting pair : 2 x Insulated wire
Pair No Color of insulation
a-wire b-wire
1 white blue
2 white orange
3 white green
4 white brown
5 white gray
6 red blue
7 red orange
8 red green
9 red brown
10 red gray
4 Cable Make-up ：10 Pairs shall be form a sub-unit。
:20 Pairs shall be form a 5 pairs-units . （4x5p The binder color of the sub-units ，in turn，is a blue 、blue 、orange、orange.）
5. Core Wrapping : The cable core shall be wrapped with a continuous protective layer of one or two tapes, lapped helically or laid longitudinally.
6. Rip Cord : Nylon Yarn
7. spare pairs： ： NO
8. Identification : Placed between the cable core and PET tape with a Identification
9. Water Resistant Compound : NO
10. Moisture Barrier : Longitudinally Overlapped Laminated Aluminum Tape
Nominal Thickness of AL : 0.15±0.015 mm
The plastic layer ：One side with plastic coated
Nominal Thickness of Plastic ：0.05±0.01mm
11. Drain wire ：NO
12 Self-Support Cables: 7-strand galvanized steel strand is used as support wire. Black polyethylene sheath covers both core and support wire in a figure-8 construction.
Cable size galvanized steel strand Nominal SIZE（mm） Nominal Thickness（mm） Outer Diameter (Approx.) （mm）
10x2x0.5mm 1*7-4.5 1.4 7.3
20x2x0.5mm 1*7-4.5 1.4 7.3
13 the web： The height of the web shall 3.0±0.5mm。
The thickness of the web shall be2.2±0.5mm for cables.
14 Outer Sheath : LDPE (Black Color)
Cable size Nominal Thickness（mm） Min. Thickness at any point（mm） Outer Diameter (Approx.)CXH （mm）
10x2x0.5mm 1.6 1.40 10.7 *21.0
20x2x0.5mm 1.6 1.40 13.0*23.0
15. Sheath Marking : According to the customer request
16. Packing and Weight :
Cable size Drum material Drum length Wooden drum size Net. Weigh t
Kg/drum(Approx.) Gross.Weight
Kg/drum(Approx.)
10x2x0.5mm Wood drum 1 800*400*400 240 290
20x2x0.5mm 1 800*400*400 300 370
Electrical Characteristic
1 Max. Conductor Resistance at 20°C : 91 Ω/km
2 Resistance Unbalance
- Max. Average : 5%
3 Dielectric Strength - Core to core : 2.0 kV DC/3sec.
- Core to screen :6.0 kV DC/3sec.
4 Max. Avg. Mutual Capacitance at 1000±100Hz : 52 ± 3 nF/km
5 Capacitance unbalance at 1000±100kHz
- Pair to pair : - Max. RMS : 90 pF/km
Max. Average RMS ：20 pF/km
6.Average attenuation measured at 150 kHz :8.5dB/km
7 Min. Insulation Resistance at 20 ºC : 10000 MΩ·km
MECHANICAL AND THERMAL PROPERTIES
Temperature range during operation (fixed state) : -30°C ~ +70°C
Temperature range during installation (mobile state) : -20°C ~ +50°C
Minimum bending radius : 15 x Overall Diameter
