CSA Z463:24

Preface This is the third edition of CSA Z463, Maintenance of electrical systems . It supersedes the previous edition published in 2018 and the first edition, published in 2013 as a guideline. This Standard specifies basic requirements on maintenance of electrical systems based on principles of loss control and safety management systems. It also provides guidance on the selection of reference standards, electrical equipment-specific maintenance procedures, and the assessment of electrical equipment to verify correct function. In addition to converting many previous advisory criteria into mandatory requirements, the following is an overview of the major revisions from the 2018 edition: a) The Scope has been modified to indicate that the Standard does not currently apply to maintenance of electrical and communications supply equipment and systems owned by electric and communication utilities. These requirements are covered by CSA C22.3 No. 11. b) Definitions have been updated in accordance with the 2024 edition of the Canadian Electrical Code, Part I, as well as other CSA Group, IEEE, NEMA, and NETA standards. This Standard was prepared by the Technical Committee on Electrical System Maintenance, under the jurisdiction of the Strategic Steering Committee on Occupational Health and Safety, and has been formally approved by the Technical Committee. Because of this Standard’s close association with the Canadian Electrical Code, it has also been reviewed by the Strategic Steering Committee on Requirements for Electrical Safety (SCORES). This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 General This Standard specifies requirements for the maintenance of electrical equipment and systems. This Standard applies to new and existing electrical equipment. For new installations of electrical equipment, this Standard can be applied during the early design stages to allow for the implementation of proactive electrical maintenance practices and maintenance safety. 1.2 Purpose The purpose of this Standard is to facilitate the safe, reliable, and cost-effective operation of electrical equipment and systems through the application of consistent maintenance practices. The requirements of this Standard are intended to address worker and public safety as a primary objective and the protection of property and the environment as secondary objectives. 1.3 Application This Standard does not apply to maintenance of electrical and communications supply equipment and systems owned by electric and communication utilities. These requirements are covered by CSA C22.3 No. 11. 1.4 Measurements The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only. 1.5 Terminology 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.