What Is a Main Switch?

By Staff WriterLast Updated Mar 26, 2020 11:38:20 PM ET
main-switch
Design Pics/Darren Greenwood/N/A/Getty Images

A main switch is a central cut-off switch that controls the smaller cut-off switches and machines of a building. The main switch can be cut off by a human or a computerized system to control the flow of power in the building.

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