noun
two-way switch (UK); three-way switch (US)
A switch that controls a light from two locations. The term differs between British and American English. Related to 3路スイッチ.
See also: 3路スイッチ (さんろスイッチ)
階段の上下にCスイッチを設置した。
We installed a two-way switch at the top and bottom of the stairs.
この回路にはCスイッチが使われている。
A three-way switch is used in this circuit.