IEC 60621-2:1978/AMD1:1984 Amendment 1 - Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries) - Part 2: General protection requirements
1987IEC 60621-2:1987 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries); part 2: general protection requirements
1970IEC 60621-2:1978/AMD2:1986 Amendment 2 - Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries) - Part 2: General protection requirements
1970IEC 60621-2:1978/AMD1:1984 Amendment 1 - Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries) - Part 2: General protection requirements
1970IEC 60621-2:1978 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries) - Part 2: General protection requirements