Preface This is the tenth edition of CSA C22.2 No. 21, Cord sets and power supply cords. This edition supersedes previous editions published in 2014, 1995, 1990, 1984, 1978, 1960, 1954, 1941, and 1935 and is written in SI (metric) units, except the wire gauge sizes. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 This Standard specifies the requirements for cord sets and power-supply cords employing molded-on or assembled-on fittings, rated 600 V maximum, and intended for use in non-hazardous locations in accordance with CSA C22.1, Canadian Electrical Code, Part I, and CAN/CSA-C22.2 No. 0, General Requirements—Canadian Electrical Code, Part II. 1.2 This Standard also specifies the requirements for molded-on general-use attachment plugs and cord connectors. 1.3 This Standard also specifies the requirements for molded-on hospital grade attachment plugs and cord connectors. 1.4 This Standard also specifies the requirements for cord restraint devices. 1.5 These requirements do not cover cord sets intended for temporary outdoor use — not to exceed 90 days — with outdoor equipment, Christmas-tree, and other seasonal decorative-lighting outfits. 1.6 This Standard does not cover electric vehicle cord sets. Requirements for electric vehicle cord sets are listed in CSA C22.2 No. 282. 1.7 This Standard does not cover cord reels and power bars. Requirements for cord reels and power bars are listed in CSA C22.2 No. 308. 1.8 This Standard contains the following annexes: a) Annex A — Component standards reference list; b) Annex B — Illustrative definitions; c) Annex C — Canadian marking translations; d) Annex D — Marine shore power sets; e) Annex E — Manufacturing and production tests; and f) Annex F — Marine shore power cable sets. 1.9 In this Standard, \"shall\" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; \"should\" is used to express a recommendation or that which is advised but not required; and \"may\" is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 1.10 The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.