IEC 60999-1:1990
連接裝置.銅電線用螺旋式和非螺旋式夾緊裝置的安全要求
Connecting devices - Safety requirements for screw-type and screwless-type clamping units for electrical copper conductors - Part 1: General requirements and particular requirements for conductors from 0,5 mm<(hoch)2> up to 35 mm<(hoch)2> (included)