Appliance couplers for household and similar general purposes - Part 2-4: Appliance couplers dependent on appliance weight for engagement (IEC 60320-2-4:2005 + A1:2009) (english version)
Fuel cell technologies - Part 4-101: Fuel cell power systems for propulsion other than road vehicles and auxiliary power units (APU) - Safety of electrically powered industrial trucks (IEC 62282-4-101:2014) (english version)
Safety requirements for power electronic converter systems and equipment -- Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC (IEC 62477-2:2018) (english version)
