Telephone Cables

Annealed High Conductivity: uniform coated with Tin, Electrolytic Grade Solid Conductor conforming to IS: 8130: 1984 of diameter 0.5 mm., 0.6mm, & 0.7 mm.

Insulation

Specially formulated high grade of PVC Compound as per Type 2 of IS: 13176-1991 Hard grade and capable of withstanding higher conductor temperature up to 70 degree C. Colour of Insulation are as per table 2 of G/WIR 06/02 and colour sheds are conforming to IS: 9938.

Pairing

Two cores are uniformly twisted together to form a pair with maximum lay length 80 mm. The lay shall be so chosen as to minimize cross talk in the cable.

RIP Cord

A non-metallic such as nylon suitable rip cord shall be laid up longitudinally under the sheath for effective means of slitting the sheath longitudinally to facilitate removal.

Laying of Pairs

The Layers in cables containing 63 Wires or less shall be stranded with a suitable left hand lay. The Stranding lay of all other cable cores shall be alternate. The cable shall be wrapped with polyester tape.

Sheath

The Laid up pairs are covered with PVC Compound as per Type TM2 of IS: 13176: 1991 of Grey colour. The sheath shall be uniform and tightly fitted of overall diameter.