Telephone & Switchboard Cables
Product Details:
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Product Description
Telephone & Switchboard Cables
- V-Marc Telephone & Switchboard cables designed for voice clarity and elimination of cross talk, are most suitable for indoor use in large office / residential buildings, hotels and industrial complex for interconnection of telephone and intercom system, PBX and IN central exchange for interconnection of distribution frames, switching and transmission equipments.
- Solid A\annealed high conductivity bare copper of 0.5 mm diameter is insulated with high density polythelene in different colours. The insulated cores are twisted with uniform lay to form pairs and are bunched together in such a manner so as to minimise cross-talk. The laid up cable is taped with polyster and further jacketed with a grey colour fire retardant PVC with high oxygen index. A nylon rip cord provides an effective means of slitting the jacket without damaging the insulated cores. The cables generally conform to ITD specifications S/WS 113C and V-Marc Specifications.
- Stringent quality control is exercised at every stage, from raw material through manufacturing, upto the finished stage which guarantees high quality.
| Conductor | Insulation | Rip Cord | Sheath | ||||
| Material | Nominal Diameter (mm) | Material | Nominal Thickness (mm) | Nominal Dia of insulated conductor (mm) | Material | Material | Minimum Thickness (mm) |
| Bright annealed pure electrolytic copper | 0.50 | HDPE | 0.20 | 0.95 | NYLON | FR PVC with high oxygen and temperature indices | 1 Pair 0.50 2/8 Pair 0.65 10 Pair 0.75 |
Colour Combination
| No. of Pairs | 2 Pair | 5 Pair |
| Pair No. 1 | White - Blue | White - Blue |
| Pair No. 2 | White - Orange | White - Orange |
| Pair No. 3 | White - Green | |
| Pair No. 4 | White - Brown | |
| Pair No. 5 | White - Grey |
Electrical Parameters
| Conductor Resistance | Max. 92.20 OHM / KM at 200C |
| Mutual Capacitance | Max. 50 NF / KM |
| Insulation Resistance in air | Min. 10000 M-OHM/KM |
| Capacitance unbalance pair to pair | Max 250 PF / 100 M |
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