这些要求包括以下低压交流电源断路器:a）固定式或抽出式安装类型，b）2极和3极结构，c）手动或电动操作，以及d）带或不带机电或固态跳闸装置。这些要求适用于抽出式安装式低压交流整体熔断电源断路器，由带 集成限流器或保险丝。这些要求适用于低压交流熔断器抽头，该抽头由限流器或抽头总成中的熔断器组成，该抽头总成拟与电源串联 低压交流电源断路器形成熔断断路器。这些要求适用于通用型低压断路器- 高压直流电源断路器。根据美国国家标准协会（ANSI）/美国国家标准协会（NFPA）70中的普通电气设备使用要求。

These requirements cover low-voltage ac power circuit breakers as follows:a) Stationary-mounted or drawout-mounted types,b) 2-pole and 3-pole constructions,c) Manually operated or power operated, andd) With or without electromechanical or solid-state type trip device.These requirements apply to drawout-mounted type low-voltage ac integrally fused power circuit breakers, consisting of low-voltage ac power circuit breakers with integral current limiters or fuses.These requirements apply to low-voltage ac fuse draw-outs consisting of current limiters or fuses in a drawout assembly intended to be connected in series with a low-voltage ac power circuit breaker to form a fused circuit breaker.These requirements apply to general purpose type low-voltage dc power circuit breakers.These requirements cover equipment intended for use in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70.