前言:这是NCE、CSA集团和UL关于封闭式和死前开关的统一标准。这是NMX-J-162-ANCE的第四版，CSA C22的第八版。2第4号和UL 98第14版。本协调标准已于2016年2月12日联合发布。范围:1.1这些要求包括单独封闭的空气开关，额定电流为4000 A或以下，电压为600 V或以下，所有载流部件均封闭，可通过外部手柄手动操作，拟按照本标准附录A参考号1.1.2所列的国家安装规范使用，除非另有特别说明，否则“开关”一词是指封闭式开关或死区开关。1.3这些要求还包括安装在封闭式配电盘、封闭式配电盘等中时，所有载流部件均封闭的封闭式正面开关。这些开关可通过外部手柄手动操作，并应按照附录A，参考文件中列出的国家安装规范使用。 No.1.1.4这些要求包括封闭开关，带或不带适合用作分支电路、馈线和厂用过电流保护的熔断器。1.5以下保险丝被认为适合用作分支电路、馈线和厂用过电流保护:a）盒式保险丝（参考附录B，低压保险丝-第1-10、12和15部分），B）插头式保险丝（参考附录B，低压保险丝-第1和11部分），以及c）标记为符合特定等级保险丝性能规范的特殊用途保险丝。1.6这些要求包括用于一般用途且具有安培额定值（有或没有马力或千瓦额定值）的封闭开关，以及仅用于电机电路且具有马力或千瓦额定值但无一般用途安培额定值的封闭开关。1.7这些要求包括用于可选备用系统的双掷开关（见附录A，参考文献1）。1.8这些要求包括使用J、R或T类保险丝的额定电流大于600 A和额定电流小于等于600 A的带保险丝的电动跳闸开关。 1.9这些要求还包括电气跳闸开关，这些开关已被调查，以确定其在与接地故障传感和继电保护设备结合使用时是否可接受接地故障保护，如下所示:a）与I级接地故障传感和继电保护设备一起使用的开关包括能够中断12倍额定电流的开关或当故障电流水平超过开关的触点中断能力时，防止断开的整体装置。b） 与II类接地故障传感和继电保护设备一起使用的开关能够中断10倍于其额定电流的电流，并用于接地故障保护系统中，当接地故障传感和继电保护设备组合在一起时，可防止在超过开关触点中断能力的故障电流水平下断开连接一级和二级地面- 故障传感和继电保护设备。1.10这些要求不包括:a）速动开关的常见形式；b）主要用于启动和保护电机的开关，包括在电机启动期间分流熔断器的开关；c）具有自动跳闸功能的开关，用于断开它们，并在没有其他断路器或熔断器的情况下提供过载保护，d） 牵引熔断器或拆除可拆卸拉出构件以完成开关操作的装置，包括（或）断路器、塑壳开关、仅限磁断路器、仅限瞬时断路器和辅助保护器。

Preface:This is the harmonized ANCE, CSA Group, and UL standard forEnclosed and Dead-Front Switches. It is the Fourth edition of NMX-J-162-ANCE, the Eighth edition of CSA C22.2 No. 4, and the Fourteenth edition of UL 98. This harmonized standard has been jointly issued February 12, 2016.Scope:1.1These requirements cover individually enclosed air switches, rated 4000 A or less at 600 V or less, having all current-carrying parts enclosed, manually operable by means of external handles, and intended to be employed in accordance with the national installation codes listed in Annex A, Ref. No. 1.1.2As used in this Standard, the term switch is intended to mean an enclosed switch or deadfront switch unless specifically stated otherwise.1.3These requirements also cover deadfront switches that have all current-carrying parts enclosed when mounted in an enclosed panelboard, deadfront switchboard, or the like. These switches are manually operable by means of external handles and are intended to be employed in accordance with the national installation codes listed in Annex A, Ref. No. 1.1.4These requirements cover enclosed switches with or without provision for fuses suitable for use as branch circuit, feeder, and service overcurrent protection.1.5The following fuses are deemed suitable for use as branch circuit, feeder, and service overcurrent protection:a) Cartridge Fuses (Ref. Annex B, Low-Voltage Fuses – Parts 1 – 10, 12 and 15),b) Plug Fuses (Ref. Annex B, Low-Voltage Fuses – Parts 1 and 11), andc) Special Purposes Fuses marked as meeting the performance specifications of a specific Class Fuse.1.6These requirements cover enclosed switches intended for general use and having ampere ratings, with or without horsepower or kilowatt ratings, and enclosed switches intended for motor-circuit use only and having horsepower or kilowatt ratings but no general-use ampere ratings.1.7These requirements cover double-throw switches intended for use in optional standby systems (see Annex A, Ref. No. 1).1.8These requirements cover fused electrically tripped switches rated over 600 A and rated 600 A or less employing Class J, R or T fuses.1.9These requirements also cover electrically tripped switches that have been investigated to determine their acceptability for ground-fault protection when combined with ground-fault sensing and relaying equipment as follows:a) Switches for use with Class I ground-fault sensing and relaying equipment include those that are capable of interrupting 12 times their rated current or that have integral means to prevent disconnecting as levels of fault current exceeding the contact interrupting capability of the switch.b) Switches for use with Class II ground-fault sensing and relaying equipment are capable of interrupting 10 times their rated current and are for use in ground-fault protection systems in which means to prevent disconnecting at levels of fault current exceeding the contact interrupting capability of the switch are incorporated within the ground-fault sensing and relaying equipment when combined with Class I and II ground-fault sensing and relaying equipment.1.10These requirements do not cover:a) Common forms of snap switches,b) Switches having features intended primarily for the starting and protection of motors, including the switches arranged to shunt out fuses during the starting of motors,c) Switches provided with automatic trips for opening them and constructed to afford overload protection without other circuit breakers or fuses,d) Devices in which the pulling of fuses or the removal of a detachable pullout member is designed to accomplish a switching operation, ore) Circuit breakers, molded-case switches, magnetic-only circuit interrupters, instantaneous-only circuit breakers, and supplementary protectors.