T/LWB 001-2019 Rated voltage of 1kV and below overhead insulated cables

Scope

Main technical content: 7.2.2 The surface of the conductor shall be smooth, free from oil stains, and without damage to the shielding and insulation, such as burrs, sharp edges, and protruding or broken single wires. 7.2.3 When the conductor is stranded, the stranding direction shall comply with the provisions of GB/T 1179, and it may also be produced according to the customer's requirements. 7.2.4 When there are 7 or fewer single wires in the conductor, all single wires are not allowed to have joints. When there are more than 7 single wires, joints are allowed on the single wires, but the distance between two joints on the finished stranded conductor shall not be less than 15m. 7.3 Insulation 7.3.1 The insulation shall be made of weather-resistant materials based on polyvinyl chloride, polyethylene, or cross-linked polyethylene. 7.3.2 The insulation shall be tightly extruded onto the conductor, and the surface of the insulation shall be smooth and uniform in color. 7.3.3 The nominal thickness of the insulation shall comply with the provisions of Table 3, and the average thickness of the insulation layer shall not be less than the nominal value. The minimum thickness at the thinnest point shall not be less than 90% of the nominal value, with a minimum of 0.1mm.

Development Information

Related Standards