Cables armoured fire-resistant symmetrical pair twisting for data transmission, with single-wire copper conductive cores with cross-section from 0,20 to 2,50 mm², with thermal barrier of conductive cores in the form of winding from two mica-containing tapes, with the number of twisted pairs from 1 to 12 or two parallel-packed pairs, with insulation and sheathing made of polyvinyl chloride plasticate of reduced fire hazard with low smoke and gas emission, with a screen of laminated aluminium foil, with armour in the form of a braid of galvanized steel wires, without protective hose, designed for operation at voltages up to 300 V inclusive alternating current frequency of 50 Hz.
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