Household appliances, one lamp, two double control switches, one at the door, one at the head of the

The circuit diagram of the dual-control switch is as follows:

> physical picture: <>

A dual-control switch is a switch with two contacts L L1 and L2 (i.e. a pair) at the same time. Usually two dual-control switches are used to control a lamp or other electrical appliance, which means that there can be two switches to control the switch of a lamp or electrical appliance.

The two-way control switch can be controlled by three wires, which is actually achieved by using interchangeable contact loops.

><>3: The first switch L port is connected to the live wire incoming line, the second switch L port is connected to the live wire outlet, <>4: the live wire outlet is connected to the positive pole of the bulb, and the neutral wire is connected to the negative bulb, OK, so that you can control a lamp with two switches.

The connection of one lamp and two control switches:

Alternative wiring method of duplex switch circuit (both switches are in the live wire, safety) wiring points:

One of the twin wires must be directly connected to the middle and indirect wire ends of the two duplex dual control switches;

The other wire in the double wire connects the upper (or lower terminal) of the two switches, and a branch wire is connected to one end of the lamp, and the other end of the lamp is connected to the neutral wire.

Both switches are connected to the live wire and are connected to the upper terminal (or lower terminal), but not to the intermediate terminal.

Cabling characteristics of this circuit:

A wire in a double-connected dedicated wire with a branch wire in the middle that is connected to one end of the lamp. (The traditional duplex dual-control circuit is not allowed to lead out of the branch line in the duplex dedicated line).

Both switches are connected to the live wire, and can only be connected to the upper terminal (or lower terminal), which makes the light on, the measurement voltage of the three terminals of the two switches to the neutral line is 220V, that is, the tester is displayed in red.

> special reminder, the use of the wire saving method, although saving some wires, but the potential safety hazards are very large, especially when the quality of the switch is not good, often due to the switching terminal, due to the switch separation is not complete, it is easy to cause a short circuit inside the switch, which leads to a short circuit of the entire line, burns the meter fuse, if used for a period of time, this performance is particularly prominent. Therefore, the use of this wire-saving method is not recommended. The names of the two keywords of "double switch" and "double control switch" are very tangled, in fact, "double switch" is a popular saying, and most people understand that two switches control a lamp.

The simple understanding is to connect the lights with two switches to realize the function of two switches to control the light on and off. Although the name is not very professional, everyone wants to express the same meaning.

<> there need to be three wires between the switch from the door to the head of the bed, two of which directly connect the L1 and L2 of the two switches, the COM of the switch at the door is connected to one of the original lighting switch wires (that is, the two that come down from the wall), the remaining line is connected with the remaining one of the three lines, and the other end is connected to the COM of the switch at the head of the bed.

There are two wires between the two switches, and then one switch is connected to the fire wire, and the other is connected to the light wire, so that the wire can be directly connected to the lamp.

<> ordinary three-pin switch.

<> switch panel is different from the ordinary one, commonly known as a dual control switch, or a double switch.

Double-control switch door to the head of the bed to walk a few lines.

How to connect the three wires of the lamp port.