Preface Update #1 was published as notification that this is now a National Standard of canada. Scope 1.1 This Standard specifies the safety requirements for medical supply units for application in medical areas, such as general wards, as well as in special purpose areas, such as operating theatres, induction rooms, recovery wards, dialysis units, intensive care or therapy units, and other intermediate care areas. Medical supply units are intended to supply medical gases, either singly or in combination with other services, for example, electric power, liquid supply, or equipment connections. 1.2 This Standard also specifies requirements pertaining to reliable operation of the units where it impinges on safety. 1.3 This Standard does not cover a) the general requirements for electrical safety already covered in CSA C22.2 No. 601.1 and CAN/CSAZ32; b) other equipment, such as devices for nurse call systems or monitoring, that can be incorporated in, or mounted on, medical supply units; c) safety hazards resulting from the intended physiological function of equipment covered by this Standard; and d) medical gas control panels. Note: An example of a medical gas control panel is a nitrogen control panel used to supply nitrogen at high pressure to drive surgical tools. 1.4 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. Legends to equations and figures are considered requirements.