Shielding tape for plenum rated cables

Optical waveguides – Optical transmission cable

Patent

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Details

385106, 385101, 174 24, G02B 644

Patent

active

056664524

ABSTRACT:
A plenum rated cable having a core that includes a transmission medium of one or more copper or tin-copper conductors having thereon an insulating layer of an ethylene-chloro tetrafluoro ethylene composition. A first shield surrounds the core and extends longitudinally within and parallel to the length of the cable and includes a first layer of aluminum material and a second layer of cellulose acetate or polypropylene. The first and second layers are bonded together. A second shield surrounds the first shield and extends longitudinally within and parallel to the length of the cable and includes a first layer of aluminum and a second layer of cellulose acetate or polypropylene. The first and second layers are bonded together. A drain wire drains leakage within the cable generated from the current and allows for easy termination of the shield to the connector. A thermoplastic jacket encloses the drain wire and longitudinally surrounds the second shield and is made of a polyvinyl chloride composition.

REFERENCES:
patent: 4272155 (1981-06-01), Slaughter
patent: 5237635 (1993-08-01), Lai

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