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Cable of increased fire resistance for data transmission systems with twisted pair of insulated silicon-organic rubber copper single-wire conductive cores with diameter from 0,50 to 1,75 mm with the number of pairs from 1 to 4, with an additional barrier in the form of winding "eight" polyimide film in the twisted pair, with an additional thermal barrier over the core in the form of winding of mica-containing tape, with a screen made of laminated aluminium foil, with a sheath made of polyvinylchloride plasticate of reduced fire hazard with low smoke and gas emission and low toxicity of combustion products, for rated voltage up to 300 V inclusive AC frequency 50 Hz, for single and group laying.