CSA C22.2 No. 330:23

1 Scope 1.1 This Standard specifies requirements for photovoltaic (PV) rapid shutdown systems (PVRSS) and PV rapid shutdown equipment (PVRSE) intended to be used in locations in accordance with CSA C22.1, Canadian Electrical Code, Part I (CE Code, Part I) and rated 1500 V or less. A PVRSS is an integrated set of discrete PVRSE that work together to shut down one or more PV arrays installed on a building or structure. 1.2 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.