Revised
IEC 60335-2-2:1977 ED2
IEC 60335-2-2:1983 ED3
IEC 60335-2-2:1983/AMD1:1987 ED3
IEC 60335-2-2:1983/AMD2:1989 ED3
IEC 60335-2-2:1993 ED4
IEC 60335-2-2:1993+AMD1:1998 CSV ED4.1