IEC 60998-2-1:1990 Connecting devices for low voltage circuits for household and similar purposes; part 2-1: particular requirements for connecting devices as separate entities with screw-type clamping units
2002IEC 60998-2-1:2002 Connecting devices for low-voltage circuits for household and similar purposes - Part 2-1: Particular requirements for connecting devices as separate entities with screw-type clamping units
1990IEC 60998-2-1:1990 Connecting devices for low voltage circuits for household and similar purposes; part 2-1: particular requirements for connecting devices as separate entities with screw-type clamping units