Revised
IEC 60400:1982/AMD1:1986 ED2
IEC 60400:1982/COR1:1983
IEC 60400:1982 ED2
IEC 60400:1987 ED3
IEC 60400:1990 ED4
IEC 60400:1990/COR1:1992
IEC 60400:1990/AMD1:1993/COR1:1993