2007IEC 60446:2007 Basic and safety principles for man-machine interface, marking and identification - Identification of conductors by colours or alphanumerics
2002IEC 60446/COR1:2002 Basic and safety principles for man-machine interface, marking and identification - Identification of conductors by colours or numerals
1999IEC 60446:1999 Basic and safety principles for man-machine interface, marking and identification - Identification of conductors by colours or numerals
1989IEC 60446:1989 Identification of conductors by colours or numerals