Solid PE insulated jelly filled underground
Polyethylene insulated jelly filled telephone cables are widely used for primary and secondary underground distribution network. The cables having single jacket are used as duct cables up to 1200 pairs as primary network. Secondary cables are directly buried and may be Armored with additional jacket of a tough weather resistance LDPE compound.
The cables core are fully filled with Petroleum jelly having the same dielectric constant and fully compatible with the insulation and jacketing materials. The cable are manufactured with high-grade materials according to REA Specification PE-39 and PTCL Specifications or customers requirements.
Fully annealed high quality solid copper , the conductor sizes are 0.4, 0.5, 0.6 & 0.9 mm.
Color High Molecular Weigh Solid High-Density Polyethylene.
Cables are fully color coded in accordance with PIC even count color code.
Two colored insulated conductors are uniformly twisted together to form a pair. Varying lay length is designed to minimize the cross talk and capacitance unbalance.
STRANDING / CABLING
Twisted pairs are assembled into unit of 10, 25, 50 or 100 pairs. When desired for lay-up reason, the units are divided into two or more sub-nits, which are bind with durably colored Polyethylene Tapes to form a compact and circular cable.
The water resistant filling compound is applied to fill the air spaces within the cable core
A non-hygroscopic and dielectric Polyester Tape and Water Blocking Tape are applied helically having a suitable overlap.
Sufficient flooding compound is applied between the core wrap and shield.
MOISTURE BARRIER INNER SHEATH
An Aluminum Tape with Co-polymer coating is applied over the cable core and sheath with Black Polyethylene Compound.
A Tin Coated Steel Corrugated Tape is applied longitudinally directly over the Inner Sheath with suitable flooding compound.
Black High Molecular Weight Low Density Polyethylene Compound.
An identification Tape durable marked with the manufacture’s name, year of manufacturing and cable size, if required, is placed under the Core Covering Tape. Alternatively, these details may be printed on the outer jacket of cable with length marking.