Unfilled Double Sheathed Underground Telephone Cables
- Used for distribution and long distance networks and installed for secondary and primary networks.
- The cable structure is completed by the application of a suitable core wrapping material, copolymer coated moisture barrier and overall the black inner/outer jacketing.
- Inner/Outer jacketing material is MDPE, LDPE or HDPE in accordance with ASTM D 1248. Outer jacket sequentially marked by hot foil printing method.
- These types of cables designed for duct type installationConductor
Solid annealed electrolytic copper. The conductor sizes are 0.4, 0.5, 0.6, or 0.9 mm
Color Coding
Fully color-coding. Please refer to annex for detailed information of pair color code and sub units color codes.
Insulation
Colored foam skin polyethylene insulation and solid insulation in according to ASTM 1248, foam skin insulation with cellular polyethylene covered with skin layer of high density polyethylene compound. Solid insulation made by medium or high-density polyethylene compound.
Twisting / Quadding
Two or four insulated wire twisted together. The twist length specially designed to minimize the capacitance unbalance and cross talk.
Cable Core
Stranding of 50 pairs or 100 pairs unit, which is assembled in to 10 pair groups, assembles the cable core.
Core Wrapping
Twisted quads or pairs are assembled to form a substantially cylindrical group of 10 pairs (units). Super units that are assembled by suitable number of units are binded with polypropylene tapes and cabled to complete cable core.
Identification
A plastic tape, durable marked by the manufacturer name, year of manufacture, and cable size (if required) is placed under the core wrapping.
Inner Jacket
An extruded black low-density or medium density polyethylene in accordance with ASTM D 1248 encloses the cable core.
Screen
A single flat aluminum tape (0,2 mm thickness of aluminum) coated both side 50 micron polyethylene film applied longitudinally over core covering with an min 5 mm overlap. In customer request 0,15 mm thick aluminum tape could be used.
Cable Construction - Conductor & Insulation
- Core Wrapping
- Inner sheath
- Aluminum Foil
- Outer Sheath
|
0,4 mm Conductor |
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| Number of Pair | Outer Diameter of Cable mm | Weight of Copper Kg/km (Nom) | App. Cable Weight (Kg/Km) | Reel Length (m)* ± %5 |
| 10 | 10,0 | 22,6 | 110 | 2.000 |
| 20 | 11,7 | 45,3 | 145 | 2.000 |
| 30 | 12,8 | 67,9 | 180 | 2.000 |
| 50 | 14,8 | 115,5 | 255 | 1.000 |
| 100 | 18,5 | 231,0 | 425 | 1.000 |
| 150 | 21,5 | 346,5 | 590 | 500 |
| 200 | 24,0 | 462,0 | 760 | 500 |
| 300 | 28,5 | 693,0 | 1.090 | 500 |
| 400 | 32,5 | 924,1 | 1.390 | 500 |
| 600 | 37,5 | 1.386,1 | 2.040 | 500 |
| 900 | 45,0 | 2.079,1 | 2.950 | 400 |
| 1.200 | 51,5 | 2.772,2 | 3.890 | 400 |
| 1.500 | 57,0 | 3.456,2 | 4.810 | 300 |
| 1.800 | 62,0 | 4.158,2 | 5.710 | 300 |
|
0,5 mm Conductor |
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| Number of Pair | Outer Diameter of Cable mm | Weight of Copper Kg/km (Nom) | App. Cable Weight (Kg/Km) | Reel Length (m)* ± %5 |
| 10 | 11,0 | 35,5 | 125 | 2.000 |
| 20 | 13,0 | 71,1 | 190 | 2.000 |
| 30 | 14,3 | 106,6 | 240 | 1.000 |
| 50 | 16,5 | 181,2 | 350 | 1.000 |
| 100 | 21,0 | 362,4 | 610 | 500 |
| 150 | 25,0 | 543,6 | 855 | 500 |
| 200 | 28,0 | 724,8 | 1.115 | 500 |
| 300 | 33,5 | 1.087,2 | 1.590 | 500 |
| 400 | 37,5 | 1.449,6 | 2.065 | 500 |
| 600 | 43,5 | 2.174,3 | 2.310 | 500 |
| 900 | 51,5 | 3.261,5 | 4.330 | 400 |
| 1.200 | 59,0 | 4.348,7 | 5.690 | 300 |
|
0,6 mm Conductor |
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| Number of Pair | Outer Diameter of Cable mm | Weight of Copper Kg/km (Nom) | App. Cable Weight (Kg/Km) | Reel Length (m)* ± %5 |
| 10 | 12,0 | 51,2 | 150 | 1.200 |
| 20 | 14,3 | 102,3 | 240 | 1.200 |
| 30 | 16,3 | 153,5 | 310 | 1.200 |
| 50 | 19,5 | 260,9 | 470 | 1.200 |
| 100 | 25,8 | 521,8 | 860 | 800 |
| 150 | 30,5 | 782,8 | 1.035 | 400 |
| 200 | 34,5 | 1.043,7 | 1.590 | 400 |
| 300 | 41,0 | 1.565,5 | 2.290 | 400 |
| 400 | 46,5 | 2.087,4 | 2.995 | 400 |
|
0,9 mm Conductor |
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| Number of Pair | Outer Diameter of Cable mm | Weight of Copper Kg/km (Nom) | App. Cable Weight (Kg/Km) | Reel Length (m)* ± %5 |
| 10 | 14,7 | 115,2 | 250 | 1.200 |
| 20 | 18,5 | 230,2 | 420 | 1.200 |
| 30 | 21,3 | 345,3 | 580 | 800 |
| 50 | 26,5 | 587,1 | 950 | 800 |
| 100 | 35,0 | 1.174,1 | 1.730 | 400 |
| 150 | 43,0 | 1.761,2 | 2.545 | 400 |
| 200 | 49,0 | 2.348,3 | 3.360 | 400 |
| 300 | 59,0 | 3.522,4 | 4.890 | 400 |