CSA C22.4 NO 1
Objective-based industrial electrical code
|Publication Date:||1 January 2009|
This Code specifies objectives to provide for the safety of persons, livestock, and property against dangers and damage that can arise from the use of electrical installations and to provide for the proper functioning of those installations. In addition, this Code sets objectives for the protection of property against damage, if the damage can lead to unsafe events or conditions for persons and livestock.
This Code specifies safety objectives for the following criteria in relation to electrical systems operating or intended to operate at all voltages in electrical installations within industrial facilities:
(b) selection of electrical equipment;
(c) erection and verification; and
(d) operation and maintenance.
This Code specifies technical provisions to address the safety objectives. The technical references in this Code are not exclusive and do not necessarily represent all acceptable solutions that might be considered to have a bearing on the objectives of this Code.
This Code and any standards referenced herein do not make or imply any assurance or guarantee with respect to the life expectancy, durability, or operating performance of the equipment and material referenced herein.
In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the authorized 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.