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And the triple switch? A switch with four terminals?
Generally, the single-pole double-throw is called a double-link switch.
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2 lights, just use 2 two-position dual-control switch panels!! How to use a triple (three-position) switch?
[How to control two lights with a double-link dual-control opening and copying,]. >>>More
You need to use a double-open and double-control switch, which can turn on or off the living room light in the bedroom; In the living room you can turn off and on the bedroom lights. Right?
This is called dual control. Two live wires are required between the switches.
It can't be connected, because there is only a live wire in the switch, one live wire in, and one live wire out. >>>More
There is no neutral line in the existing dual control switch, and no socket can be installed. >>>More