GB/T 18213-2025 in English

This standard provides guidance on the calculation of direct current resistance for copper conductors in low-frequency cables and wires, whether they are undecorated or decorated. It outlines the methods and considerations necessary for accurate resistance measurement. The document specifies the conditions under which measurements should be taken, including temperature and material properties. It also includes formulas and procedures for determining resistance values based on conductor dimensions and material characteristics. The standard aims to ensure consistency and reliability in resistance calculations across different applications. It is applicable to manufacturers, testing laboratories, and other relevant parties involved in the production and evaluation of copper conductors.