Applies to auxiliary contact units associated (or intended to be associated) with circuit-breakers for overcurrent protection, and with residual current operated circuit-breakers with or without integral overcurrent protection for household and similar installations, having a rated voltage not exceeding 440 V a.c. and 250 V d.c., and a rated current not exceeding 10 A. THIS CONSOLIDATED VERSION CONSISTS OF THE FIRST EDITION (1999) AND ITS AMENDMENT 1 (2002). THEREFORE, NO NEED TO ORDER AMENDMENT IN ADDITION TO THIS PUBLICATION.