Correct wiring method for duplex switches 20

Connection and precautions of duplex switch.

There are generally two ways to connect the duplex switch, one is the traditional safety connection method, one of the duplex wires must be directly connected to the middle and indirect wire ends of the two duplex switches, and both switches are connected to the live wire; The other is the wire saving method, although it can save the wire, but the safety hazard is very large, and it is easy to cause a short circuit.

In order to prevent potential safety hazards in daily maintenance, it is best to use two-color wires for wiring cables to distinguish between live wires and neutral wires. Generally, the live wire uses red insulating cables, and the neutral wire uses cables of other colors of insulating skin, which need to be paid attention to when purchasing cables. The switch is to be installed in the live line, and cannot be installed casually, otherwise there is a risk of electric shock.

Therefore, before installing the line, it is necessary to check the power cord of the house with an electric pen to confirm the live wire and the neutral line. After the wiring is completed, be sure to seal the wire hinges with insulating electrical tape to prevent short circuit and electric shock. At this point, the dual-control light line is installed.

The duplex switch is connected by different terminals to achieve different effects, and the functions and connections of each terminal must be distinguished when wiring.

<> simple fluorescent lamp circuit consists of a lamp, a starter, and a ballast, as shown in the figure above. The inner wall of the fluorescent tube is coated with a layer of fluorescent substance, and the two ends of the tube are equipped with filament electrodes, which are coated with oxides that are easy to emit electrons after heating, and the tube is filled with thin inert gas and mercury vapor. The ballast is an inductive coil with an iron core.

The starter consists of a glow tube (consisting of fixed contacts and an inverted U-shaped bimetal sheet inside) and a small capacitor in a cylindrical housing.

When the power is turned on, because the lamp is not ignited, the glow tube of the starter (between the fixed contact in the tube and the inverted U-shaped bimetal) is subjected to a power supply voltage of 220V and the glow is discharged, so that the inverted U-shaped bimetal sheet is heated and bent and contacts with the fixed contact, and the current forms a circuit through the ballast and the filament and the starter at both ends of the lamp. The filament emits electrons when it is heated due to the presence of an electric current (starting current) flowing through it. At the same time, the inverted U-shaped bimetal sheet in the starter cools down due to the end of the glow discharge and separates from the fixed contact, causing the circuit to suddenly disconnect.

At this moment, the higher induced voltage generated by the ballast and the power supply voltage (about 400-600V) are applied to both ends of the lamp, forcing the arc discharge in the tube to emit light. After the lamp is ignited, due to the current limiting effect of the ballast, the voltage at both ends of the lamp is low (about 100V for a 30W lamp), and the starter is connected in parallel with the lamp, and the lower voltage cannot make the starter act again.

A single knife must be connected to a wire and is a trunk road; Go to the left and right sides to connect the electrical appliances, and then go back to the negative pole.

A knife in the line of fire, a knife lamp! Cross lights on both sides are connected to zero!

How to wire the duplex switch correctly? Such a simple knowledge, no need to ask an electrician, a little bit of thoroughness.

1. There are six binding posts behind the double switch, which are L1, L11, L21, and L22.

2. First, connect a section of wire to the L1 interface cable of the switch.

3. Connect the other end to the L2 terminal.

4. After that, connect another section of wire to the L11 and L21 terminals of the switch. This brings the two switches in series.

5. After that, connect the live wire to the L12 terminal and turn on the power supply of the two switches. Connect the neutral wire to the L22 terminal so that the wiring of the switch is connected.

Three methods: 1. Normal connection method of double-line light.

2. Double inlet fire connection method.

3. Duplex light opening plus diode connection method.

Duplex switches are also known as duplex switches. These two circuits ensure that when any one of the switching states changes, the intermediate connected electrical appliances and power supplies can be switched in the open and open circuit state.

There are two ways to operate, one is a multi-control switch, which is less on the market, and the other is replaced by a multi-position dual-control switch.

Generally, there are two methods, one is the traditional safety connection method, one of the double wires must be directly connected to the middle and indirect wire ends of the two double switches, and both switches are connected to the live wire; The other is the wire saving method, although it can save the wire, but the safety hazard is very large, and it is easy to cause a short circuit.

The double switch is divided into two kinds of double single control and double double control, the single switch refers to the combination of two single open, control the lights of two points, and the double control switch is mostly used for the control of two positions to a point light switch.

Connect the live wire to the middle of a switch, and then connect the two wires to another switch, and then a line to the lamp in the middle of the switch, and the zero line of the lamp is connected to the nearest place casually.

1. Duplex BAI

Switch advantages: one place to open du

lights, in another place can be turned off.

dao。2. There must be two double inline switches to achieve this function capacity.

3. The zero line (N) directly enters the lamp head.

4. The live wire (L) is connected to the common terminal L of the first duplex switch.

5. The first duplex switch L1 and L2 correspond to the L1 and L2 of the second duplex switch respectively.

6. The common end of the second duplex switch is connected to the lamp head. That's OK.

The connection method of the duplex switch is shown in the figure

L1 and L2 are two common points, L11 and L12 are switches with L1, L1-L11 or L1-L12.

In the same way, L2-L21 and L2-L22 are connected.

A pair of switches can only be connected by one, not by two at the same time.

Electrician basics: how to wire the duplex switch correctly? The old electrician teaches you the correct wiring and increases your knowledge.

First, the middle line post of the duplex switch is connected with the live wire, and then the middle line post of the other switch is connected with the lamp head (or the central tongue of the screw lamp head), in short, the two green wires are connected to the upper and lower two binding posts; Finally, the neutral wire is connected to the contact at the other end of the lamp head, so that the duplex switch is connected.

How to connect the duplex switch?

1. Alternative method: connect one end of the two switches to the live wire, and the other end is connected to the electrical equipment, so that the two switches control the live wire.

2. Wire saving method: connect the electrical equipment to the middle of the two switches, so that the switch controls the live wire and the neutral line at the same time as the circuit.

3. Traditional method: This kind of wiring is more common than the base ant, which connects one end of the circuit to the live wire and one end to the zero wire.

The role of single and double switches

The single gang has only one contact and is used for jog control. The duplex with two contacts, the one with a spring, is often used for long-acting control.

In the case of single and dual control, simply put, two switches with a certain distance in front of the number of fronts control a group of light sources at the same time. The single-link single-control potato cleaning can only control the light source with one button, and the stairs on both sides can control the corridor lights. Coupling means that there are two or more switch buttons on the same switch panel.

The control mode of the control finger switch button is divided into two types: single control and double control.

The dual single control is a panel with two single control buttons, we can control the opening and off of the lamp in a fixed place, and the two-way control switch used in the stairwell, which can be turned on and off at the bottom.

What are the precautions for switch installation?

1. Region. Because the use of each area is different, the natural use of the switch should also be different, for example, the kitchen and bathroom belong to the wet area, when choosing the switch, try to make the kind with the switch and the indicator light, it is best to install a waterproof cover on the outside of the switch, so as to avoid the entry of water vapor, to prevent the phenomenon of short circuit.

2. Habits. For the location of the switch selection, must be determined according to the living habits of the people used at home, for example, most of them are accustomed to using the right hand, and the door will open to the left, then the switch is suitable for the left side in front of the door, and for the bedroom or some larger living rooms, it is recommended to install a double control switch to increase the convenience of use.

3. The spacing between the switches of the TV wall.

If the wall height of the TV wall is above, it is recommended to increase the number of sockets, if the wall is lower, it is recommended to install it in the middle position, in addition, when choosing the socket, try to install a 5-hole socket, the socket should be located near the outlet of the wire, and the interval is best kept above.