Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; household, commercial, industrial and institutional kitchen appliances, namely electric roasters, electric cooking kettles, electric grills and steam tables; electric and gas ranger, microwave, electric and gas cooking ovens; commercial electric kettles; electric commercial food warmers and thawers; electric frying oans, deep fryers, and steam cookers for household and commercial use; gas and electric cooktops (hobs); cooker hoods; ventilators for air exhaust systems; cooling appliances