The ASCO 911 RC switch is an industrial remote control switch used to connect or disconnect heavy electrical loads from a distance. It operates by using a control voltage, such as 120 V AC, to energize a coil that opens or closes the main power contacts, allowing automated control without manual operation. These switches can carry high current, often around 100 amps or more, and can handle the inrush and duty demands of lighting, motors, or feeder circuits. The contacts are mechanically held so they stay reliably open or closed once switched. They are commonly installed in commercial or industrial electrical panels where remote or automatic load control is required.