Applies to control circuit devices and switching elements intended for controlling, signalling and interlocking of switchgear and controlgear having a rated voltage not exceeding 1000 volt a.c. (at a frequency not exceeding 1000 Hz) or 600 V d.c. Provides special requirements for indicator lights and control switches with positive opening operation. This Standard is identical with and reproduced from IEC 60947-5-1:1997 including the Amendment 1:1999 and Amendment 2:1999.