The telephone cables with continuous polyethylene insulation, in polyethylene sheathing, shielded with water-blocking tape are designed for operation in local primary communication networks with nominal voltage of remote power supply up to 225 and 145 V AC 50 Hz or voltage up to 315 and 200 V DC respectively and for installation of low-frequency stationary equipment. Cables can be laid in telephone ducts, in collectors, shafts, on the walls of buildings, for suspension on overhead lines and in conditions of high humidity, in soils of all categories not subject to permafrost deformations, for suspension on supports, for laying on the inner walls of buildings and indoors.
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