CAN/CSA-C22.2 NO. 0.4-04 (R2013)

This is the third edition of CSA C22.2 No. 0.4, Bonding of electrical equipment, one of a series of Standards issued by the Canadian Standards Association under Part II of the Canadian Electrical Code. It supersedes the previous editions published in 1982 and 1972 under the title Bonding and Grounding of Electrical Equipment (Protective Grounding).

The major changes in this edition are as follows:

(a) The terminology has been updated throughout the Standard to reflect definitions in the Canadian Electrical Code, Part I.
(b) The bonding impedance requirements for cord-connected equipment have been revised to recognize the 5-20RA receptacle configuration permitted by the Canadian Electrical Code, Part I. For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CAN/CSA-C22.2 No. 0. 

Scope

1.1
This Standard applies to electrical equipment that is intended for installation and use in accordance with the requirements of Part I of the Canadian Electrical Code (CEC) and is

(a) cord connected or permanently connected and required to be bonded by either Part I or Part II of the CEC; or
(b) constructed in a manner intended to ensure that it will be bonded when installed (even though bonding is not required by the CEC). 

Note: The bonding specified in this Clause does not include bonding that is applied to equipment solely for a purpose such as protection from lightning discharge or preventing electrical noise from interfering with the functioning of communications and computer circuits. 

1.2
This Standard includes provisions for certain details of construction and for testing procedures by which a certifying agency may determine compliance with the applicable Standard.

1.3
In CSA Standards, 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.

Legends to equations and figures are considered requirements.