CSA C22.2 No. 203.1:22

1 Scope 1.1 This Standard applies to manufactured wiring systems for installation in accessible areas in dry, nonhazardous locations in accordance with the Canadian Electrical Code, Part I. 1.2 This Standard applies to manufactured wiring systems having a maximum voltage rating of 600 V, and a maximum current rating of 30 A. 1.3 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.