intermediate switch; crossover switch; four-way switch
Electrical wiring component used with two 3-way switches to control a light from three or more locations. UK term: intermediate/crossover switch; US term: four-way switch.
See also: 片切スイッチ (かたぎりスイッチ) · 三路スイッチ (さんろスイッチ)
The staircase lighting is controlled by 3-way and 4-way switches.
Please tell me how to wire a four-way switch.
Standard technical spelling using numeral ４.
Kanji spelling; less common in technical contexts.
Compound of 四 (four) + 路 (path/way) + スイッチ (switch), referring to the four terminals of the switch.