This is the first edition of CSA C68.7, Underground secondary and service-entrance cable for electrical distribution utilities.
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 specifies requirements for 600 V copper and aluminum conductor secondary and service-entrance cables intended primarily for operation by electrical utilities. These cables are intended for underground installation
(a) by direct burial; or
(b) in conduit systems.
This Standard also applies to multiple-conductor cable assemblies.
(1) The cables covered by this Standard are exposed to sunlight on terminal poles and during storage.
(2) The operation of cables complying with this Standard by other than an electrical utility can be subject to additional requirements by an authority having jurisdiction.
This Standard applies to cables with
(a) a maximum allowable conductor temperature of 75 °C or 90 °C; and
(b) cold impact and cold bend ratings of -40 °C.
Cables rated at 75 °C are suitable for voltage regulation limited applications where ampacity considerations are not applicable. Cables rated at 90 °C are suitable for ampacity limited applications.
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; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability.
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.