CAN/CSA-C282-05

1 Scope 1.1 This Standard applies to the design, installation, operation, maintenance, and testing of emergency generators and associated equipment for providing an emergency power supply to electrical loads in buildings and facilities when the normal power supply fails and an emergency power supply is required by the National Building Code of Canada (NBC). Notes: (1) For guidelines on emergency electrical power supply for life-support equipment, see Annex A. (2) In this Standard, the term "building" also includes facilities. 1.2 This Standard does not cover (a) any emergency power supply provided from storage batteries or other sources of uninterrupted power supply (UPS); (b) application of an emergency power supply; and (c) design and construction of unit equipment for emergency lighting that complies with CSA C22.2 No. 141. 1.3 In CSA Standards, "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; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. 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.