This is the first edition of CSA C22.2 No. 273, Cablebus. It is one of a series of Standards issued under Part II of the Canadian Electrical Code.
For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of the latest edition of CAN/CSA-C22.2 No. 0.
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.
This Standard applies to a complete cablebus system (termination to termination) and associated fittings rated at not more than 46 kV and intended for use in accordance with 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.
For the purpose of these requirements, a cablebus is an assembly of insulated cable conductors 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.
The values given in SI (metric) units are mandatory. Any other values given are for information only.
Note: Lengths are shown in millimetres or metres (inches or feet). Widths, deflections, and similar measurements are generally defined in millimetres (fractions of inches), and load-bearing capacity in kilograms/metre (pounds/foot).
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.