Telephone (Switchboard) Cables

High conductivity solid annealed bare copper industrial telephone (Switchboard) Cables with high density polyethylene insulation, paired, polyester and sheathed with high oxygen index, fire retardant, PVC Compound, grey outer sheath generally conforming to TEC specification.

Special Features

The conductor is made of electrolytic grade, bright annealed bare solid copper conductor of 0.40/ 0.5 mm diameter and is insulated with a special grade polyethylene compound on the latest state-of-the-art extruders. The cores are twisted together with a uniform lay on a special purpose imported machine, according to the color code to form pairs. The pairs are bunched together in such a manner so as to minimize cross talk. The cable is then jacketed with a specially formulated PVC compound with fire retarding properties. A nylon rip cord provides an effective means of slitting the jacket without damaging the insulation. These are ideal because of low attenuation and low cross talk. Available in standard pack of 100 M and 500 Mk.

Pair Color   Binder Color
Pair No. Wire A Wire B 1 Blue
1 White Blue 2 Orange
2 White Orange 3 Green
3 White Green 4 Brown
4 White Brown    
5 Red Blue    
6 Red Orange    
7 Red Green    
8 Red Brown    


Switch board cables are best suited for all telephone switch board applications in high rise buildings, offices, factories, hotels, hospitals, residential complexes etc. They generally conform to the TEC specifications G/W1R- 06/03 March 2002 and In-house specifications and are ideally designed to minimize cross talk.

Diameter of Conductor (mm) Maximum Resistance of Conductor at 20 deg C Conductor Elongation (Min) Radial thickness of conductor insulation Maximum external diameter of insulated conductor
Nom. Min. Ohm/km % mm Mm
0.40mm 0.39mm 143 15 0.1 to 0.2
+0.05, -0.00
0.50mm 0.49mm 92.20 15 0.2
+0.05, -0.00
0.60mm 0.59mm 64 15 0.2
+0.05, -0.00