This part of IEC 61788 specifies a test method for the resistive determination of the critical temperature of composite superconductors for industrial use. The composite superconductors covered in this standard include Cu/Nb-Ti, Cu/Cu-Ni/Nb-Ti and Cu-Ni/Nb-Ti composite superconductors, Cu/Nb3Sn and Cu/Nb3Al composite superconductors, and metal-sheathed MgB2 composite superconductors, and metal-stabilized Bi-system oxide superconductors and Yttrium- or rare-earth-based coated conductors that have a monolithic structure and a shape of round, flat or square wire containing mono- or multi-cores of superconductors.