Applies to electromechanical air break contactors for household and similar purposes provided with main contacts intended to be connected to circuits the rated voltage of which does not exceed 440 V a.c. with rated operational currents less than or equal to 63 A for utilization category AC-7a and 32 A for utilization category AC-7b, and rated conditional short-circuit current less than or equal to 6 kA. This standard replaces IEC 60158-3. This consolidated version consists of the first edition (1992) and its amendment 1 (2000). Therefore, no need to order amendment in addition to this publication.