IEC 61992-1:2006+A1:2014 specifies requirements for d.c. switchgear and controlgear and is intended to be used in fixed electrical installations with nominal voltage not exceeding 3 000 V d.c., which supply electrical power to vehicles for public guided transport, i.e. railway vehicles, tramway vehicles, underground vehicles and trolley-buses. Part 1 specifies general requirements. This consolidated version consists of the second edition (2006) and its amendment 1 (2014). Therefore, no need to order amendment in addition to this publication.