IEC 60725 TRTR Ed. 1.0-Considerations on reference impedances for use in determining the disturbance characteristics of household appliances and similar electrical equipment, IEC 60335-2-73:2002+AMD1:2006+AMD2:2009 CSV-Household and similar electrical appliances-Safety-Part 2-73: Particular requirements for fixed immersion heaters, IEC 60364-7-711: