本规程描述了工厂组装的室外低压开关架的设计、制造、检查、测试和装运要求。本规程包括开关机架组件的要求，包括母线、外壳、电机起动器、熔断开关和断路器。

This Practice describes the requirements for the design, fabrication, inspection, testing, and shipping of factory-assembled outdoor low-voltage switch racks. This Practice includes requirements for switch rack components including buses, enclosures, motor starters, fused switches, and circuit breakers.