1. IEC 60621-5:1987 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries). Part 5: Operating requirements

2. IEC 60631:1978 Characteristics and tests for electrodynamic and electromagnetic braking systems

3. IEC 60621-4:1987 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries). Part 4: Requirements for the installation

4. IEC 60628:1985 Gassing of insulating liquids under electrical stress and ionization

5. IEC TR 60638:1979 Criteria for assessing and coding of the commutation of rotating electrical machines for traction

6. IEC 60618:1978/AMD2:1997 Amendment 2 - Inductive voltage dividers

7. IEC 60630:1994/AMD6:2009 Amendment 6 - Maximum lamp outlines for incandescent lamps

8. IEC 60621-3:1979/AMD1:1986 Amendment 1 - Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries). Part 3: General requirements for equipment and ancillaries

9. IEC 60609-1:2004 Hydraulic turbines, storage pumps and pump-turbines - Cavitation pitting evaluation - Part 1: Evaluation in reaction turbines, storage pumps and pump-turbines

10. IEC 60609-2:1997 Cavitation pitting evaluation in hydraulic turbines, storage pumps and pump-turbines - Part 2: Evaluation in Pelton turbines