Cables of increased fire resistance shielded for fire alarm system of pair twisting, with one pair of conductive copper cores with nominal cross-section 0,35 mm2, insulated with fire-resistant organosilicon rubber, with additional thermal barrier in the form of winding from mica-containing tape, with a screen of laminated aluminium foil and a drainage conductor under it, with an outer sheath of polyvinyl chloride plastic of reduced fire hazard, with low smoke and gas emission and low toxicity of combustion products, designed for operation at voltages up to 300 V inclusive alternating current frequency of 50 Hz.
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