Applies to switches, disconnectors, switch-disconnectors and fuse-combination units to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1000 volt a.c. or 1500 volt d.c. Specifies characteristics of equipment, conditions with which the equipment shall comply with reference to operation and behaviour in normal service and specified abnormal conditions and dielectric properties, tests for confirming that these conditions have been met and the methods to be adopted for these tests and the information to be marked on the equipment or supplied by the manufacturer. This Standard is identical to and reproduced from IEC 60947-3:1999 and includes variations made to this document by its Corrigendum:1999/07 and Amendment 1:2001.