Draft Details

Designation:C22.2 NO. 273
Review start date:Dec 18, 2018
Review end date:Feb 16, 2019
Contact email:mary.morgan(at)csagroup.org
Draft Scope/Description:

1 Scope


This Standard applies to a complete cablebus system (termination to termination) and associated fittings rated at not more than 46 kV ac or dc, and intended for use in accordance with the National Electrical Code (NEC), the Canadian Electrical Code, Part I and General Requirements — Canadian Electrical Code, Part II, CSA C22.2 No. 0. These requirements do not apply to metal enclosed busways, as covered by CSA C22.2 No. 201 and CSA C22.2 No. 27 / UL 857.


For the purpose of these requirements, a cablebus is an assembly of  single conductors and/or cables designed as a system to transmit large magnitudes of electrical current and to withstand the effects of specified system requirements (i.e. short-circuit current, circuit loading, bonding etc) with fittings and conductor terminations in a completely enclosed, ventilated, or non-ventilated protective metal housing.


This standard also applies to transition enclosures used for the transition between cablebus and adjoining equipment, where applicable.


Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.


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.

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