需求
“Two-way lighting on 230 V AC: one lamp switched from both ends of a hallway by two SPDT switches joined by two strappers.”
接著試試Add a third switch in the middle as an intermediateLabel the live, neutral and strapper wires
這張圖裡有什麼
看懂背後的決策。
01
Use SPDT switches with common, normally open, and normally closed terminals
02
Connect traveler wires between the switches' non-common terminals
03
Place the lamp in series between the second switch's common and neutral
Ideal for staircase lighting, hallway controls, or any room with two entrances where a single light fixture must be switched from either side.