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