Cable symmetrical pair twisting with polyethylene insulation of conductive cores, twisted in pairs with steps not equal and not multiples of each other, pairs twisted in the core unidirectional twisting, over which a screen of metal-polymer tape with a contact conductor of tinned copper wire, over which the sheath of light and thermostabilised polyethylene is applied, with an external load-carrying element twisted from seven galvanised steel wires of 0.5 mm diameter, connected to the main cable by a jumper.
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