A dual control switch is a switch with two contacts that are normally open and normally closed (that is, a pair). Usually two dual control switches are used to control a lamp or other electrical appliances, which means that there can be two switches to control the switching of electrical appliances such as lamps.
In addition, the dual-control switch is also used to control the lamps that are forced to be ignited in the emergency lighting circuit. Two ends of the dual-control switch are connected to dual power sources and one end is connected to the lamp, that is, one switch controls one lamp.
If it is a traditional switch, if you want to turn off the light, you have to run downstairs to turn it off. Using a dual-control switch can avoid this trouble. In addition, the dual-control switch is also used to control the lamps that are forced to be ignited in the emergency lighting circuit. Two ends of the dual-control switch are connected to dual power sources and one end is connected to the lamp. Zh
1. Before installation, cut off the power supply. It is strictly forbidden to install with power on, and install by professionals. Open the packaging box, take out the switch, use a screwdriver to reach into the notch on the lower end of the switch, and gently pull it upward to release the panel. L1 is the input and L2 is the normally closed output. L3 is the normally open output.
2. Connect the wires, fix the 86 junction box with screws, and fasten the panel. It is strictly forbidden to connect the switch to the neutral and hot wires at the same time. Before installation, ensure that the load and line are intact; if there is no blue light, it means the line is not connected, you need to check the line; if a single switch is invalid, it means that one line is not connected; if two switches are invalid at the same time, it means that the public line is not connected Connected, that is, the zero live wire is not connected or the load is open; if the background light is on but the touch does not work, you need to cut off the power and then re-energize.