CSA C22.2 NO. 124:25

Preface This is the seventh edition of CSA C22.2 No. 124, Mineral-insulated cable . It supersedes the previous editions published in 2016, 2004, 1986, 1974, 1966, and 1960. It is one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. The following are the major changes to this edition: a) updating Clause 1.2of Scope to remove "in ordinary locations" to maintain consistency with the language used in CSA product standards; b) updating test method references from CSA C22.2 No. 0.3 to CSA C22.2 No. 2556; c) updating the requirements for interval marking in Clauses 6.1.1.1, 6.1.1.2, 6.3.2, and 6.4.2; d) adding requirements for conductor number and size marking in Clause 6.1.1.2; e) updating Table 1to correct values in the column for type and number of conductors; f) updating the requirements of physical properties after aging in Table 8; g) updating the requirements of physical properties after oil aging in Table 9; h) adding requirements for the minimum size conductors for bonding conductors in a new Table 10; and i) adding new requirements for the physical properties of halogen-free thermoplastic jackets in a new Table 11. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was prepared by the Integrated Committee on Metal Clad Cables, under the jurisdiction of the Technical Committee on Wiring Products and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. 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 applies to mineral-insulated cables with copper, nickel/nickel alloy-clad copper, steel-clad copper, or nickel conductors, enclosed in a copper or stainless steel sheath. 1.2 The constructions covered by this Standard are intended for use in power, instrumentation, control, and fire alarm systems that are intended to be installed in accordance with the Canadian Electrical Code, Part I. 1.3 The constructions covered by this Standard are recognized for use where normal conditions are such that no part of the cable is subjected to a temperature in excess of 250 °C. When provided with an overall thermoplastic or thermoset protective covering, the use is restricted to 90 °C. 1.4 The constructions covered by this Standard are a) Type MI mineral-insulated, copper-sheathed cable recognized for use on systems having a nominal voltage of 600 V or less; b) Type SSMI mineral-insulated, stainless steel-sheathed cable recognized for use on systems having a nominal voltage of 600 V or less; c) Type LWMI mineral-insulated, copper-sheathed cable recognized for use on systems having a nominal voltage of 600 V or less; and d) Type SSLWMI mineral-insulated, stainless steel-sheathed cable recognized for use on systems having a nominal voltage of 600 V or less. 1.5 Optional requirements are provided for a) twisted pair configurations; b) copper or stainless steel shields; c) overall thermoplastic or thermoset protective coverings; d) flame test classification; and e) fire rating. 1.6 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.