knife switch

(Electrical Engineering) an electric switch in which a flat metal blade, hinged at one end, is pushed between fixed contacts

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

References in periodicals archive

Also called a "knife switch," it breaks your connection from the power grid and allows you to be self-contained safely.

Building principles: that's the night the lights went out

On its way to the vehicle propulsion system, the power passes through a knife switch, which divides it into two circuits.

Light rail vehicles: the trolley's time has come - again

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