7.2 Conductors The conductors shall consist of one or more single wires of pure metal or metal alloys. If the conductor consists of pure copper wire with a metal plating, the metal plating should match the conductor operating temperature. The resistance of the conductor at (20±1) ℃ should meet the company's process requirements, and the maximum deviation is +10% ~ -5%. 7.3 Insulation: Fluorine plastic is used for insulation. The minimum average thickness of the insulation is 0.3mm, and the thinnest point should not be less than 0.20mm. The properties of insulation materials comply with the requirements in Table 1. 7.4 Shielding layer 7.4.1 Resistor meets the requirements of GB/T 20841. 7.4.2 The penetration resistance of the shielding shall comply with the requirements of GB/T 20841.
T/LWB 002-2019 history
2019T/LWB 002-2019 Geothermal wires and cables with a rated voltage of 300/500 V and below