What is the difference between single-connected, double-connected, single-controlled and double-controlled switches?

Single connection: it is a switch with pedal on the panel, which is divided into single single control and single double control.

Duplex: two switches are side by side, and one panel has two pedals, which are divided into duplex single control and duplex double control.

2. Different terminals

The single control switch has only two terminals, one in and one out, to control the closing of the circuit; The double control switch has three terminals (one in and two out, two in and one out, and of course one in and one out).

3. Different usages

The single control switch is the switch that controls the light; Double-control switch is used to control the switch of the same lamp in two different places, such as living room and stairs, so it is very convenient to go back to the bedroom in the dark after turning off the light (entrance door).

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