Recent IEC International Electrotechnical Commission Advice
IEC 60335-2-101:2002/AMD2:2014-Amendment 2-Household and similar electrical appliances-Safety-Part 2-101: Particular requirements for vaporizers, IEC 60204-33:2009-Safety of machinery-Electrical equipment of machines-Part 33: Requirements for semiconductor fabrication equipment, IEC 60335-2-21:2012-Household and similar electrical appliances-Safety