请注意:此版本的所有临时修订版将在您购买时提供。I类2类或2区内燃机电点火系统的一般要求，危险（分类）位置SUL 1220012范围本标准提供了制造商安装和维护建议之外的最低结构和测试要求，以确保I类2类C或D组或I类2区IIB或IIA组火花点火往复式内燃机点火系统和部件的安全运行，危险（分类）场所。这些要求适用于二次电压小于或等于35 kV的额定正常运行系统。本标准仅适用于运行时静止的往复式内燃机点火系统。这不包括发动机在运行时处于运动状态（车辆）的任何应用。 本文件范围涉及的应用包括但不限于气体压缩机、发电机和泵。本标准适用于适合在-40°C至+70°C（-40°F至+158°F）环境温度范围内使用的点火系统。

Please note: All interim revisions for this edition available at time of your purchase will be included.General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) LocationsUL 1220012 ScopeThis standard provides minimum construction and test requirements in addition to manufacturer installation and maintenance recommendations for the safe operation of ignition systems and components for spark-ignited reciprocating internal combustion engines in Class I, Division 2, Group C or D or Class I, Zone 2, Group IIB or IIA, hazardous (classified) locations. These requirements apply to systems rated for normal operation with secondary voltages less than or equal to 35 kV.This standard is intended to cover only ignition systems of reciprocating internal combustion engines that are stationary when in operation. This does not include any application where the engine would be in motion (vehicles) while operating. Applications addressed by the scope of this document include but are not limited to gas compressors, electric power generators, and pumps.This standard applies to ignition systems suitable for use in an ambient temperature range of -40°C to +70°C (-40°F to +158°F).