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)
Medical electrical equipment - Part 1: General requirements for basic safety and essential performance (IEC 60601-1:2005 + Cor.:2006 + Cor.:2007 + A1:2012) (english version)