CSA C22.2 No. 8-2026

Electromagnetic interference (EMI) filters

Preface This is the sixth edition of CSA C22.2 No. 8, Electromagnetic interference (EMI) filters , one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. It supersedes the previous editions published in 2013, 1986, 1982, 1945, and 1934. The purpose of this Standard is to specify requirements for electromagnetic interference (EMI) filters. It covers filters used with apparatus and machines connected to ac supplies up to 750 V and 60 Hz, or dc supplies up to 1060 V, and intended for use in nonhazardous locations in accordance with the Canadian Electrical Code, Part I. The following are the major changes to this edition: a) updates to the referenced standards to latest editions; and b) updates to Table 4with changes to V rms ranges and the addition of a section for appliance filters. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was prepared by the Subcommittee on Electromagnetic Interference (EMI) Filters, under the jurisdiction of the Technical Committee on Consumer and Commercial Products and the Standards Steering Committee on CE Code, Part II, 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 filters intended for suppressing electromagnetic interference in, or with, apparatus and machines that are to be connected to an ac supply with nominal system voltages of up to 750 V and a nominal frequency of up to 60 Hz or connected to a dc supply up to 1060 V dc, intended to be used in nonhazardous locations in accordance with the Canadian Electrical Code, Part I. 1.2 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.