序言这是C22的第五版。2第22号，CSA集团根据《加拿大电气规范》第二部分发布的易燃和可燃加油机电气设备。它取代了1986年、1983年、1963年和1935年出版的之前版本。本版本的变更包括:a）用区域分类代替分区分类，并参考适当的区域标准；b） 区域分类信息参考第一部分CE代码，而不是重复本标准第一部分CE代码；c）根据当前的编辑实践进行重组。范围1。1本标准适用于石油基液体（IIA类液体）电动分配器的电气特性，包括丙烷和打火机- 根据加拿大电气规范第一部分（CE规范第一部分），在750 V及以下电压下运行的内燃机中用作燃料的天然气等空气燃料，其目的是将燃料直接分配到发动机的燃料储罐中。1.2在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“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 fifth edition of C22.2 No. 22, Electrical equipment for flammable and combustible fuel dispensers issued by CSA Group under the Canadian Electrical Code, Part II. It supersedes the previous editions published in 1986, 1983, 1963, and 1935. Changes to this edition include: a) replace the Division classification with Zone classification and referencing the appropriate Zone standards; b) reference the CE Code, Part I for area classification information instead of repeating the CE Code, Part I in this standard; and c) reorganization per current editorial practice.Scope1.1 This Standard applies to the electrical features of power-operated dispensers for petroleum-based fluids (Group IIA fluids), including propane and lighter-than-air fuel such as natural gas, used as fuel in internal combustion engines, where such devices are operated at 750 V and less, in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), and are intended to dispense the fuel directly into the fuel storage tank for the engine. 1.2 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.