CSA C22.2 NO. 88:19

Preface This is the second edition of CSA C22.2 No. 88, Industrial heating equipment, issued by the Canadian Standards Association under Canadian Electrical Code, Part II. It supersedes the first edition published in 1958. This edition has been substantially rewritten with the following major changes: a) Clause 2, Reference publications, updated to latest editions; b) Clause 4.3, Protection against rusting and corrosion, has been rewritten; c) Clause 4.5, Supply connections, has been clarified and updated; d) Clause 4.17, Spacings, requirements updated and now aligned with other similar product standards; e) Clause 4.18, Bonding means, updated to align with other similar product standards; f) Clause 5, Marking, requirements aligned with other similar product standards; g) Clause 6.3, Temperature, requirements updated and aligned with similar product standards; and h) Clause 6.4, Dielectric strength, requirements updated and aligned with similar product standards. 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 This Standard specifies the requirements for cord-connected and permanently connected industrial type heating equipment that is intended to be used in ordinary locations in accordance with CSA C22.1, Canadian Electrical Code, Part I (CE Code, Part I) and rated 600 volts or less. 1.2 This Standard applies to a) heat treating and other special-use furnaces; b) infrared mobile and stationary drying ovens; c) steam boilers and distilling equipment of the electrode or resistance-element type; d) liquid-heaters; e) electrically-heated presses; and f) similar equipment. 1.3 This Standard does not apply to a) equipment utilizing high-frequency alternating currents; b) soldering irons, tube vulcanizers, and similar small devices which, although often used in industrial premises, normally have enclosures, spacings, and other constructional features similar to appliances; or c) air-heaters for industrial establishments, which are covered in CSA C22.2 No. 46, Electric air- heaters. 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. Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.