A dual-control switch is a switch with two normally open and normally closed contacts (ie, one pair). Usually two dual-control switches are used to control one lamp or other electric appliances, meaning that there can be two switches to control the switches of the lamps and other electrical appliances, for example, to open the switch when going downstairs, and close the switch after going upstairs. The following small series for everyone to introduce what is the dual control switch and dual control switch how to connect.
What is a dual switch
Dual-control switches, as the name suggests, are equipped with two switches to control the on and off state of the appliance. We use it on the lighting of the furniture, for example, to turn on the switch when we go downstairs and close the switch after we go upstairs. If you are using a traditional switch, if you want to turn off the light, you have to go downstairs and turn off. With a dual-control switch, you can avoid this trouble. In addition, the dual-control switch is also used to control the lamps that require emergency ignition in the emergency lighting circuit. Both ends of the dual-control switch are connected to dual power supplies, and one end is connected to the lamps, that is, one switch controls one lamp.
How to connect the dual control switch
1. Let's take two separate control switches and one light to explain in detail. Dual-control switch terminals are usually marked with "L", "L1", "L2". When the L terminal enters the line, L1 and L2 have one end connected to L, and after pressing the switch, the other end of L1 and L2 is connected to L.
2. Let's use a diagonal pliers to strip the skin and take care not to leave too long a thread to avoid touching it.
3, we use the L of the left switch as the front input, L1 and L2 of the two switches corresponding wiring, and then the right switch L is connected to the end of the lamp, the other end of the lamp is connected to the zero line.
4, after taking care of the line must pay attention to the lighting of both sides of the head with insulation tape wrapped to avoid leakage.
5. Finally, leave the front and connect the plug to the zero line to complete the wiring of all dual control switches.
6, in order to facilitate the wiring, we can remember the circuit diagram of the dual control switch, so the actual operation is very simple wiring.
The difference between dual control switch and single control switch
For example, an electric light only needs a switch to control, we can choose a single control switch; but sometimes for convenience, such as the bedroom light bulb we want to use the switch to control him in the bedroom door, you can also control him on the bedside, so that the bedroom door Both the switch on the bedside and the switch on the bedside can control the same lamp. It is necessary to use the double switch. In summary, a single control switch is a switch that controls one lamp, and a dual control switch is two switches that can control the same lamp. The dual control switch can be used instead of a single control switch, and the single control switch cannot be used in place of the dual control switch.
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