序言这是CSA C22的第八版。2第52号，地下二次和服务入口电缆，CSA集团根据《加拿大电气规范》第二部分发布的一系列标准之一。它取代了之前的版本，2015年以相同的标题出版，2009年、1996年、1989年、1970年、1955年和1941年以地下服务入口电缆的标题出版。新版标准包括a）颜色编码条款的变更；b） CSA C22对测试程序的更改。 2号0.3至CSA C22。2号2556；c） 更新“导管架贯穿试验”；d） 表12中为提高清晰度所做的修改；e）在表15中为6 AWG电缆添加缺失值。本标准规定了600伏级铜和铝导体地下二次和服务入口电缆的要求。有关《加拿大电气规范》第二部分标准的一般信息，请参见CAN/CSA-C22的前言。2号，0号。范围1。1本标准规定了铜和铝导线二次和二次使用的要求- 用于地下装置中标称电压为600 V或以下的系统的入口电缆a）直埋；或b）管道系统中。本标准也适用于多导体电缆组件。本标准中规定的产品设计为按照《加拿大电气规范》第一部分的规定进行安装。注:本标准所涵盖的电缆部分将暴露在终端杆和储存期间的阳光下。1.2本标准适用于a）导体最高允许温度为i）75？C 或者ii）90？C和b）冷冲击和冷弯额定值？40?C.1.3在本标准中，“应”用于表示要求，即用户有义务满足的条款，以符合本标准；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。 表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

PrefaceThis is the eighth edition of CSA C22.2 No. 52, Underground secondary and service-entrance cables, one of a series of Standards issued by CSA Group under the Canadian Electrical Code, Part II. It supersedes the previous editions, published in 2015 under the same title, and in 2009, 1996, 1989, 1970, 1955, and 1941 under the title Underground service-entrance cables. This new edition of the Standard includes a) changes in the colour coding clause; b) changes to testing procedures from CSA C22.2 No 0.3 to CSA C22.2 No 2556; c) updates to the "jacket cut-through test"; d) changes to improve clarity in Table 12; and e) adding a missing value for 6 AWG cable in Table 15. This Standard specifies requirements for 600-volt-class copper and aluminum conductor underground secondary and service-entrance cables. For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CAN/CSA-C22.2 No. 0.Scope1.1 This Standard specifies requirements for copper and aluminum conductor secondary and service- entrance cables intended for use on systems having a nominal voltage of 600 V or less in underground installation a) by direct burial; or b) in duct systems. This Standard also applies to multiple-conductor cable assemblies. The products specified in this Standard are designed to be installed in accordance with the rules of the Canadian Electrical Code, Part I. Note: Portions of the cable covered by this Standard will be exposed to sunlight on terminal poles and during storage. 1.2 This Standard applies to cable with a) a maximum allowable conductor temperature ofi) 75?C; or ii) 90?C; andb) cold impact and cold bend ratings of?40?C. 1.3 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.