Preface This is the harmonized CSA Group and UL standard for Appliance and Flatiron Plugs. It is the First edition of CAN/CSA-C22.2 No. 57, and the First edition of UL 498C. Scope 1.1 These requirements cover flatiron and appliance plugs intended for use on cord-connected portable cooking or heating appliances rated up to 20 A, 250 Volts or less, intended for use in ordinary non-hazardous locations - all intended for connection to a branch circuit for use in accordance with the National Electrical Code, NFPA 70 and the Canadian Electrical Code, Part I, CSA C22.1-15. 1.2 This Standard does not directly apply to the following devices, but may be used to supplement the requirements within these standards when a device is evaluated to these standards: a) Devices produced integrally with flexible cord or cables that are covered by the Standard for Cord Sets and Power-Supply Cords, UL 817; b) Devices intended for connection to the branch circuit, such as attachment plugs, cord connectors, receptacles, inlets, and outlets, which are covered by the Standard for Attachment Plugs and Receptacles, UL 498; c) Devices solely intended for direct connection to the branch circuit in accordance with the National Electrical Code, NFPA 70, and that are provided with contacts of the pin and sleeve type, that are covered by the Standard for Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type, UL 1682; d) Devices consisting of wiring terminals and supporting blocks intended for the connection of wiring that are covered by the Standard for Terminal Blocks, UL 1059; e) Devices such as wire connectors and soldering lugs that are covered by the Standard for Wire Connectors, UL 486A-486B; the Standard for Splicing Wire Connectors, UL 486C; or the Standard for Equipment Wiring Terminals for Use with Aluminum and/or Copper Conductors, UL 486E; f) Devices such as quick-connect terminals that are covered by the Standard for Electrical Quick-Connect Terminals, UL 310; or g) Devices such as appliance couplers that are covered by the Standard for Appliance Couplers for Household and Similar General Purposes - Part 1: General Requirements, UL 60320-1.