How to connect a switch with three wires

Wiring diagram for a light switch with one key

This article will talk about connecting a light switch in an apartment with one connected lamp. Previously, this was a simple matter - two wires, plug a switch into the gap and that’s it.

But the days of Khrushchev-era buildings and socket buildings with simple electrical networks are over, and in modern houses everything is somewhat more complicated.

In fact, for a more or less technically knowledgeable person, this is a simple matter that requires only: basic knowledge about electricity and the operation of the switch, a flat-head and Phillips screwdriver, a voltage indicator (optional).

The article is divided into two stages:

1. The first stage is theory, or what the connection diagram of a switch with a lamp looks like.
2. The second stage is practice. Let's take the tools and get to work.

Schematic diagram of connection

The light switch looks like this in the diagram:

This is the simplest scheme from old houses. In order for a standard 220 V lamp to be turned on, two wires must be connected: phase (L) and neutral (N).

When the electrical circuit is not interrupted and an electric potential arises in the phase wire, current flows through the lamp and the lamp lights up. A light switch has the job of closing or opening an electrical circuit to turn on or turn off a lamp.

In addition, a protective (grounding) conductor must be connected to the protective terminal of the lamp to equalize the potential of the lamp body with the ground potential. This protection against electric shock is needed, for example, when touching the body of a damaged light bulb.

The following diagram is closer to modern times:

Here a 3-wire power cable is supplied to the electrical unit.

• bronze wire - phase
• blue wire - neutral
• yellow-green - protective wire

An additional cable is routed from the electrical box to the lamp. As we have already determined, a light switch has the task of interrupting the circuit in only one place, and that place is the phase wire.

Attention! If you made a mistake and connected the neutral wire to the switch instead of the phase wire (and the phase wires will go directly to the consumer), everything will work - when pressed, the lamp will light up or go out. However, a problem will arise that despite the light bulb being turned off, electric potential will be supplied to the lamp itself.

This creates an additional risk of electric shock if you want to replace the lamp with the lights turned off - the phase will still be present on the wires and on the lamp. As a result, during any work to replace a burnt-out lamp, it will be necessary to turn off the voltage in the home switchgear (open the circuit using circuit breakers).

In general, it is better to do it as expected.

For the above diagram in the example considered, we will add two more elements that may not be used if there is a circuit breaker, but it is worth mentioning them anyway. These elements are:

• The three-wire power cord goes to the next switch.
• The fourth wire (black) in the cable is between the box (this is the hole in the wall for the switch) and the lamp.

This currently unconnected conductor may be useful in the future, for example when it is necessary to install a double switch and a lamp with many bulbs to selectively turn the light on at different brightness levels.

Useful: Wiring diagram for a motion sensor for lighting

What does the switch look like?

Here is an example of a classic dark gray switch.

There are many holes here, but we will only be interested in the 4 located in the red rectangle. These are equivalent to terminals 1 and 2 in the diagrams above. The other holes in the switch have no function. In addition, at the top and bottom there are gray plastic elements for snapping the case into place.

Returning to the face of the switch, after removing the key (usually with your fingers, pressing slightly towards you), we see a plastic piece that is used to attach the key and switch. It is not needed during assembly, so we slightly pry it with a flat screwdriver and remove it.

Installation of a single-key switch

Below are visual step-by-step instructions for connecting a light switch. Always the first thing to do before electrical work is to turn off the voltage in the home switchboard.

According to the diagram, 3 wires are freed from external insulation: the bottom 3-wire harness is power, the top 4-wire cable is connected to the lamp, and the 3-wire cable on the right goes to the next switch (you probably won’t have one).

When you reassemble or replace a circuit breaker, you may have a slightly different wiring diagram:

• There may not be a 3-wire cable to feed to another lamp.
• The network can be two-wire (without a protective conductor). There can only be two wires in the box (if yes, then the neutral and protective conductors are connected in another place, for example, in a box under the ceiling.

To make sure there is no power, use a voltage tester (probe) to check if there is a 220 V potential on the power cord wires.

The next step is to remove the insulation from the ends of the cable. It is better to perform this operation using an insulation stripper. If you don’t have one (most likely you don’t), take a mounting knife and trim the ends 20 mm.

After stripping the insulation, connect the neutral wires using the electrical connector.

There was no blue wire in the four wire cable to the lamp. We will use gray as a neutral. To avoid future misunderstandings, it is advisable to wrap the end of the incorrectly colored cable with insulating tape.

We connect the protective wires in the same way.

The connecting neutral and protective wires are hidden inside the box. In this case, there are three phase wires left that must be connected to the switch.

On one side of the switch we insert a phase wire going to the circuit breaker.

On the other side of the switch is a phase wire that leads to the lamp.

Assembling the switch. Lightly tighten the screws alternately so that you can align the switch evenly in the wall. Depending on the manufacturer, the method of fastening and connecting the wires may vary.

Place the key on the mechanism.

Sometimes the plastic decorative casing is put on first, and the key is at the very end.

Turn on the plugs or click the circuit breaker button and test the light switch. We hope everything works and we don’t have to disassemble it again, looking for where the error crept into our work :)

4— 5,00

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Source: https://2shemi.ru/shema-podklyucheniya-vyklyuchatelya-sveta-s-odnoj-klavishej/

Connecting a switch: tips for beginners on how to choose and install the switch correctly

The development of a modern power consumption system has led to the emergence of new types of electrical appliances. But they are all activated by one switch or another.

One of the representatives of this family are lighting switches. Modern manufacturers offer a wide selection of these devices that differ from each other in design, method of execution, and appearance. But they all have common features: purpose, rules and connection order.

Preparing to connect

In order to carry out work on connecting the light switch, it is necessary to prepare materials, accessories and perform certain work to ensure electrical safety.

Before starting work you must:

• determine the order of switching wires in the junction box;
• turn off the power supply to the apartment or room at the input electrical panel and check the absence of current in the home network with a tester or probe;
• groove the wall to the switch and from it to the lighting fixture;
• by the color of the wire, figure out the purpose of its cores;
• Remember that a phase wire is connected to the switch.

Necessary tools for switching electrical circuit elements:

• pliers, round nose pliers;
• a set of screwdrivers of various configurations;
• electrical tape (cambrics);
• probe or tester;
• soldering iron with elements for soldering.

General information about the product

The main task of all types of switches is to turn on or off devices closed in an electrical circuit.

Existing switches are divided according to installation method:

• wall-mounted (mounted outside the wall);
• internal (built inside the walls).

In turn, they differ from each other in design:

• push-button;
• lever;
• rotary-rotating;
• corded;
• single and multi-key.

Accordingly, depending on the characteristics of the device and its purpose, an appropriate circuit diagram for connecting the switch is drawn up.

Recently, single-key, multi-key and pass-through switches have become the most popular in the consumer market.

Single Key Switches

Devices of this type are the simplest among this type of devices. Therefore, using their example, you can easily figure out how to connect a switch to a home electrical circuit.

To connect this type of device, a VVG 2x1.5 electrical cable is used. This switch allows you to turn on and off one or more lighting fixtures with an electrical power of up to two kilowatts.

The main thing when making a connection is to insert the phase-carrying conductor through the switch. Thus ensuring its modern disconnection and connection.

In this option, the zero wire will be supplied to the light bulb without interruption directly from the junction box.

Switches with two keys

The connection diagram for a double switch is not much different from the previous diagram. This type of device is used to simultaneously connect (turn off) two independent devices, or a multi-lamp chandelier, to regulate the level of illumination in a room. These devices are used in rooms with a large number of lighting devices.

To connect chandeliers with this type of switches, a VVG 3x1.5 electric cable is used. A current-carrying conductor is connected to the break.

When purchasing a chandelier, you need to check with the seller whether it has the ability to separate the bulbs or not?

If the separation is not provided by the manufacturer, then installing a switch of this type will not provide a variation in the luminous flux.

Pass-through switches

More complex among the switch connection diagrams under consideration is the connection diagram for a pass-through switch. A special feature of such a switch is the presence of a special contact that allows the contacts to be connected to each other.

A positive feature of these devices is the ability to connect and disconnect lighting fixtures from 2 places.

Pass-through switches with two keys in their design contain 2 variable contacts. It is designed in such a way that it resembles 2 single-key pass-through switches that are completely independent of each other. To connect this device, a VVG 3x1.5 electrical cable is used.

To improve human living conditions, many electrical lighting devices have been designed. Each of them begins to work after they are turned on through the corresponding switch.

There are many photos of connection diagrams for this or that switch on the Internet. Installing a switch is a simple matter, but requires compliance with certain connection rules and ensuring electrical safety when performing this work.

Photo of the switch connection process

We also recommend viewing:

Source: https://stroimaterials.ru/podklyuchenie-vyklyuchatelya/

How to connect a switch with one key: diagrams of how to connect

To control household electric lighting sources, various devices are used, the most common of all is the switch. This is a simple device located on the wall and connected to wires. The design of the products is different, but the internal circuit diagram of the single models is the same.

In our material we will tell you how to connect a switch with one key in order to quickly make repairs. For convenience, several connection methods will be given with thematic photographs clearly demonstrating the installation process.

Design and purpose of switches

A switch is a simple mechanical (less often electronic) device for contact closing/opening an electrical circuit to turn on/off lighting fixtures.

We will touch on the design features and installation of the simplest models - single-key switches.

They consist of 4 main parts:

• working unit - metal base with contacts and push-button drive;
• fasteners - legs or antennae made of metal connected to a metal plate;
• decorative design - panels or frames;
• dynamic part - plastic key.

Some parts, mainly internal ones, are made of metal, such as galvanized steel; external decorative trim is usually made of safe plastic. Ceramic elements are also available that can withstand loads of up to 32 A, while plastic is rated for 16 A.

Reasons for installing a single key switch include:

The external and internal structure depends on several factors, for example, functional tasks or potential load. As an additional device, some models have an LED that provides external illumination.

The design of a simple switch with one key: 1 – a key with which the mechanism is activated; 2 – decorative frame; 3 – working part, which contains the electrical mechanism

Switches are installed in all rooms where there are any lighting devices that are not equipped with a power cable (for example, it is not needed for floor lamps or table lamps).

These are most often ceiling or wall lamps, chandeliers, and complex lighting systems.

When choosing devices for rooms with high humidity levels, you should pay attention to such an indicator as the level of protection: for a bedroom or living room, IP 20 is enough, for a bathroom or kitchen - IP 40, for outdoor (street) installation - IP 55

Types of devices for household use

There is no strict division into categories, since different manufacturers have their own “branded” model ranges, but several types of switches can be distinguished, united by one characteristic.

The two most common types of modern switches are the single-key wall-mounted model and the control panel, which is usually supplied with the lighting fixture.

For example, according to the principle of inclusion, all devices can be divided into:

• mechanical - elementary keyboard devices, easy to install and use (the function of a key can be performed by a lever, toggle switch, button, cord, rotary knob);
• electronic sensors activated by the touch of a hand;
• with remote control , equipped with a remote control or motion sensor.

The first group is considered the most popular, traditional and recognized from the first days of the invention of the electrical circuit; the popularity of the third is also gaining momentum, but the second somehow has not caught on.

Motion sensors save energy and serve as additional protection. For example, if you install such a device at the entrance to the house, it will signal the arrival of uninvited guests.

In residential premises, it is preferable to install internal models (with or without lighting), which do not protrude above the wall surface and look more aesthetically pleasing

According to the type of design, all switches are divided into single-key and multi-key (standard design for household use - with 2-3 keys). Each key serves to close/open one lighting circuit.

If there are several lighting fixtures in the room - a chandelier, ceiling lighting and sconces - a three-key switch is appropriate, which will allow you to turn on/off the devices alternately or together.

Also quite popular are two-key switches, which can be seen in almost every apartment. They are especially relevant for chandeliers with several lamps.

Based on the installation method, two groups can be distinguished: with external and internal installation. The external type is usually used when the wiring is exposed, and the internal type is used with cables sewn into the wall. To ensure the safety and stability of the installation of the built-in switch, use a mounting box (socket box) - a protective plastic case.

Based on the installation method, switches are divided into built-in and surface-mounted. The former are used for closed wiring, the latter for open wiring. Both options are installed according to similar schemes

Placement – ​​convenience and safety

Before installing the switch, you should consider the most convenient location for installation and subsequent use. The most advantageous area is located near the entrance doors (from the side of the door handle), but there may be exceptions (for example, next to the head of the bed).

Source: https://sovet-ingenera.com/elektrika/rozetk-vykl/kak-podklyuchit-vyklyuchatel-s-odnoj-klavishej.html

How to connect a light switch: diagrams

Very often you need to independently branch out the wiring around the house, install sockets and switches. The main thing is to have instructions and a diagram of correct installation on hand. Since connecting a light switch with your own hands is very simple, everything can be done without the help of specialists.

Kinds

There are different types of light switches that are used to control lamps in an apartment or house. Let's look at the main ones:

1. Single-key;
2. Two-key;
3. Three-key;
4. Sensory;
5. Remote.

The one-key light switch is the simplest of the existing ones. A metal bracket is installed into the device body using a screw connection. It controls the switch plate. On the sides of the bracket there are tabs, with the help of which the entire structure is installed in the box. There is also a compartment with wires in the case.

A two-key switch consists of two single-key switches in one housing. A special feature is the larger number of wire groups. You can connect chandeliers with many bulbs or several lamps in different rooms. Three-key models also have a similar design.

Photo - one and two keyboards

The touch model works due to an electrical circuit built into the body. Often equipped with a diode, backlight or switch off control. The box contains a special infrared indicator that recognizes the heat of the human body and closes the lamp contacts. The model with indicator is often used in public places.

Photo - touch

The remote control is perfect for controlling the lighting of a large house or apartment. It consists of a switch equipped with a signal receiver and a control unit. You can turn the light on and off directly from the unit or using the remote control for this purpose. Mainly used in various complexes, as well as in the Smart Home system.

Photo - remote

How to connect a single-key

To work, you will need the selected switch, junction box and lamp to which the connection will be made. Directly connecting a one-button model is very simple. How to connect a single-key light switch to one light bulb:

1. The phase wire of the power supply must be connected only through the contacts of the switching device, otherwise the lamp will always be energized, which is very dangerous. The phase is always connected to the break. Very often, home craftsmen install a break connection on the neutral wire, which can cause a short circuit or even a fire;
2. Next, connect the wires of the wall light switch and the lighting fixture in series with the power supply. Power phase - to the switch, lamp zero to phase zero, lamp phase to switch zero.

Photo - connecting a one-key player

It is more difficult to establish a connection for several lamps. There you need to take into account the phase wires of several consumers at once. Just be careful and strictly follow the announced scheme. It works as follows: when the light switch is turned on (up position), electric current begins to flow to the lamp. If the key is lowered, the chain breaks and the flow of directed particles stops.

Connecting a two-key model

A standard two-button light switch is designed to control various lighting devices or multiple groups of one lamp from a single location. Most often they are used if the chandelier has more than 2 lamps (5.6). In this case, you need to know that two keys are used to control only two groups; if the lamp is divided into more of them, then you need to use a triple switch.

Photo - connecting a two-key model to a chandelier

How to connect a two-key light switch yourself:

1. This model has three contacts - an input and two outputs. In this case, the phase from the distribution box is connected to the input contact, and the outputs are needed to control individual groups of the chandelier;
2. You need to insert the phase wire of the network and its zero into the distribution box;
3. First of all, all neutral conductors are connected to each other. The phase one is connected to the input of the electric light switch;
4. It also has wires for each group of lamps. They are most often separated by color coding. In order for each group to burn independently of the other, each must be connected to a separate phase wire. For example, yellow and gray cables: yellow is assigned to group 1, and gray to group 2;
5. The neutral wire of the switch is connected to the zeros of the lamps and the network;
6. All that remains is to isolate the conductors.

In this case, a double light switch can be connected so that when one group (main) is turned off, the second (additional) is also turned off, then the circuit will be slightly different. It is necessary to switch the device not each group separately, but both at once. The triple can be connected in a similar way. The main thing is that when the keys are turned off, the phase is disconnected, not the zero.

It is also very often necessary to connect the switch to a sconce lamp and socket. This greatly saves space in the room allocated for electrical outlets. Then the diagram looks like this:

1. The socket is installed parallel to the supply wires. The phase corresponds to the network phase, and the zero corresponds to zero;
2. The procedure for turning on the lamp does not change; we do everything as described above.

In this way, you can install a model produced by Legrand, Viko, UAZ or any others.

How to install a gateway

Nowadays, it has become very popular to install switches that allow you to turn off one group from different parts of the room. Let's look at how to properly connect pass-through light switches:

Photo - connection diagram for pass-through switch

1. The diagram takes into account the connection box, since without it it will be difficult to make a connection;
2. You need to bring the phase neutral wire into the junction box and connect it to the lamp neutral.

   The central phase cable is connected to the input contact of one of the switches to choose from;

3. After this, two switched contacts of one switch must be connected to similar terminals of the second;
4. Now, after connecting the switches, the phase from one (to which it was previously connected) is transferred to the second. Everything is placed in a box and closed.

Photo - operating principle of the walk-through model

Be sure to insulate all contacts, otherwise they will short out. Many experts recommend using soldered contacts - it is more reliable and durable than electrical tape.

Source: https://www.asutpp.ru/kak-podklyuchit-vyklyuchatel-sveta.html

How to choose and correctly connect a three-key switch - we consider carefully

In order to save a little energy, as well as control different levels of lighting from one place, light switches with three keys were created. They are often used in houses and apartments because... really convenient and easy to use. Connecting a triple model is more difficult than a single one, so this article provides you with video and photo examples, as well as a wiring diagram for a three-key light switch.

Where are they used?

Modern renovations and design solutions increasingly suggest dividing lighting into different groups.

For example, a room has a complex configuration - niches, ledges, separation by partitions or curtains. Very often now large one-room apartments are divided into zones and made into so-called studios. In this case, a switch with three keys is ideal.

By using specially thought-out and mounted zone lighting, you can highlight a work area where there will be a computer desk, a sofa, shelves with books, here the lighting is made brighter. The second zone is the sleeping area, where more subdued light is quite suitable.

The third zone is the living room, where there is a coffee table, armchairs, and a TV; here the lighting can be combined.

When else is it advisable to use a three-key household switch?

• If from one point it is necessary to control the lighting of three rooms at once, for example, a corridor, a bathroom and a bathroom, when they are located close to each other.
• In the case of combined lighting in the room - central and spot.
• When in a large room, lighting is provided by a multi-arm chandelier.
• If the room has a multi-level ceiling made of plasterboard sheets.
• When the lighting of a long corridor is divided into three zones.

Operation of a circuit with a three-key switch

When you press, for example, the right key, the right contact closes, and the phase with wire L1 enters the distribution box, where through point 2 and the ceiling wire it reaches the brown terminal of the lamp HL1 and the lamp lights up. Zero N common for all lamps .

Remember . The phase reaches the upper contacts of the switch only when the contact of the corresponding key is closed .

Now, when you press the middle key, the middle contact closes, and the phase with wire L2 enters the distribution box, where through point 3 and the ceiling wire it reaches the brown terminal of the HL2 and the lamp lights up.

The left contact of the switch works in the same way. And when three keys are pressed simultaneously, all the chandelier lamps will light up.

Well, that’s basically all I wanted to say. And in addition to this article, I recommend reading the article about connecting a chandelier with 2, 3, 5 or more lamps, which shows the principle of constructing an electrical circuit for a chandelier with any number of lamps.

Advantages

From installing such a triple switch you will receive the following advantages:

1. Externally, one switch with three keys looks more compact and more aesthetically pleasing than three single ones.
2. Laying electrical wires to the connection point will be less expensive in terms of labor and money.
3. You will need to make one technological niche in the wall for the mounting box instead of three.
4. Economic effect. For example, if your chandelier has 3-4 light bulbs, then turning on a single-key switch ensures that all of them work at once, while consuming maximum electricity. But such illumination is not always necessary; dim light is sufficient. If you install a 3-key household switch for such a chandelier, then, if necessary, one or two lamps are turned on, thereby saving almost half of the electricity.

5 tips for choosing a three-position switch

Some rules:

1. Carefully inspect the device in the store. All three keys should work smoothly, without jamming, with characteristic clicks.
2. There should be no abrasions, scratches or cracks on the outside.
3. It is preferable to take breakers with a block base made of ceramic or thick metal. They can withstand overheating and high voltage better than plastic.
4. Pay attention to the degree of protection of the shell, if, of course, this matters to you. It is marked with the letters IP and two numbers. The first digit is protection from foreign objects: 0, 1 – not used in everyday life; 2 – finger protection; 3 – protection against penetration of wires and tools with a diameter of up to 2.5 mm; 4 – protection from small parts (wire, pins, etc.); 5, 6 – dust-proof models. The second digit is moisture protection: 0 – absent; 1, 2 – protection from vertically falling drops of water; 3, 4 – for the street; 5, 6 – protection from strong jets (shower, ship, etc.); 7, 8 – can withstand immersion in water, but such models are almost never found.
5. Do not forget that three-position switches are made with backlight. They are very convenient if you need to turn on or control lights in the dark. This way you will see which key is enabled and which is not. Illuminated switches come in one and two positions.

Note! To illuminate long corridors, stairs or houses with several floors, three-key pass-through switches are produced. They allow you to turn on the light in one place, for example, on the first floor, and turn it off on the second. Agree - this is convenient, because you don’t have to sneak around in the dark and feel for the keys with your hand. True, they should connect a little differently, but this is a topic for a separate article.

These are not all models of triple switches that can be found in electrical stores. There are decorative (colored, cherry, wood, etc.), waterproof, childproof, USB output, LED backlit and many other options.

How to properly connect a triple switch

Before connecting the three-key switch, be sure to de-energize the network by turning off the machines near the meter. If there is public access to the switches, put a note on it about installation work.

For work you will need:

• flat or figured screwdriver;
• pliers;
• knife or stripper (for greater convenience);
• insulating tape;
• indicator screwdriver;
• WAGO terminal blocks or others.

First you need to disassemble the three-pin switch to get to its terminals. This is done easily: pry the keys themselves with something thin, and then remove the frame. Now let's take a closer look at connecting the triple switch.

There should be four wires going to it. This can be a four-core cable, one core of which will be a phase. Although it is more common to see a single-core wire coming out of the wall - a phase - and a three-core wire nearby - for lighting devices.

You can determine the phase using an indicator screwdriver.

Connection is done in just three steps:

1. We connect the neutral wires of all consumers (luminaires) with the neutral supply. In the diagram of the figure they are indicated in blue. To connect the wires, it is convenient and practical to use WAGO terminal blocks, although you can get by with any other or simple twisting, only then do not forget to insulate the connection.
2. We connect the phase of the supply wire (brown) with the common wire of the light switch (white).
3. We connect together all the phase wires from the switch and lamps. For a better understanding, we have assembled the entire circuit according to color coding (green with green, etc.).

Note! Only the phase wire should go to the input of the three-key switch! If zero is interrupted, the light bulbs will also work, but then the electrical wiring will remain energized when in the off position. This means that even when replacing the lamp there will always be a risk of electric shock.

The wires in the switch are secured with clamping screws. No more than 5-10 mm of insulation is removed from the cable so that there are no exposed wires. If the wire is stranded, use special NShVI lugs so that it does not break off when tightening the screws.

That's all. As a result, our connection diagram for a three-key switch has been assembled. All that remains is to mount it into the socket box, open it with screws and install the lining with the keys in place.

By the way, the version of a multi-pole switch with a socket has almost the same circuit. The only difference is that a separate neutral wire is supplied to the socket, and the phase is common. It can be connected either by parallel cables (separately to the socket and separately to the switch), or by one cable (by a jumper from the socket output to the common contact of the switch). The figure below shows the second connection diagram.

Triple switch connection diagram

Note! Surface mounted switches are produced for installation on fragile walls or wooden surfaces. They are also suitable for temporary use.

How to choose?

Nowadays there is such a huge range of switches on the electrical goods market that you can find a suitable model and color for any design solution or interior. However, you understand perfectly well that shade and appearance are far from the main indicators that you should pay attention to when choosing a device. When purchasing a three-key switch, check the following:

1. The presence of modern self-clamping terminals, they are more convenient to use. Simply insert the wire into the hole and it will immediately be fixed.
2. The outer side of the product is without burrs, scratches or damage.
3. Normal operation of all terminals; they must ensure reliable fixation of the wire cores.
4. The keys do not stick when pressed (on or off) and work clearly, with a clearly audible characteristic click.
5. On the reverse side there should be a connection diagram for the triple switch.

Try to avoid cheap Chinese electrical wiring products. Buy devices from trusted companies and manufacturers.

Design

There are no special differences in the design of these switches. The principle of operation is the same as for two- or one-key ones.

Let's consider the main elements of the switching device.

Keys and frame, so-called protective elements. For their manufacture, special heat-resistant plastic is used. The keys directly turn the switch on and off.

The operating mechanism, or actuator, that operates the keys. The frame is connected to the working mechanism with special latches or screws. This entire assembled structure is mounted in an installation box and fixed in it with special spacers.

The connected three-key device must have four contacts - one to connect the power supply wire, three more will connect the switch to the lighting elements. The material for contacts is usually copper; the size varies depending on the cross-section of the wire and the connected load.

The use of this type of switches is more intensive than others, so their average service life is from 8 to 10 years. There can be two main reasons why a device may fail:

• Mechanical - fastening elements are damaged, the housing is destroyed.
• Electrical - damage to contacts.

If there is a breakdown, do not try to replace any components in a three-key switch; the device should be replaced completely. It would be better if this is done by a professional electrician in compliance with all safety rules. Although, if you are well acquainted with electrical engineering, have skills in working with power tools, and understand what “phase” and “zero” are, it will not be difficult for you to do this yourself.

Source: https://kachestvolife.club/elektrika/kak-pravil-no-podklyuchit-trehklavishnyy-vyklyuchatel

Connecting light switches with any number of keys

Nowadays no one is surprised by the benefits of civilization. When we come into a room, we don’t hesitate to reach out to turn on the lighting.

When carrying out repairs or breakdowns, the electrician must know how to install the switch. When repairing, two operations are performed: first you need to remove the faulty one, and then install the switching device.

How to remove the switch

If the electrical switch fails, it must be dismantled. To do this, the electrician must adhere to a certain algorithm. First of all, you should turn off the power to the room and take measures to prevent the machine from accidentally turning on.

To do this, a warning poster is posted with the inscription “Do not turn on! People are working." Only after this is it possible to replace the switch. First of all, you need to remove the keys.

To do this, use a thin screwdriver to carefully pry up and remove the key. The next step is to remove the decorative trim. Unscrew the screws securing the decorative frame to the plastic box and release the spacer clamps.

Only after this can the device be dismantled. Before unscrewing the suitable wires, you must check the presence of voltage at the contacts. The check is carried out with a probe or tester. Read how to properly check for lack of voltage here. After which the device is removed.

They also record the location of the wires. Only after this can the switch be installed. It is performed in reverse order.

How to connect a light switch

In order to correctly install the switching device, you need to know how the switch connection diagram is assembled. An electrician should understand the color code of wires:

• Yellow-green always connects to ground;
• Blue or light blue is connected to the neutral wire;
• Red, brown or any other color indicates the phase wire.

As a rule, when installing wiring, a phase wire comes to the electrical switch.

This rule applies to all devices, one, two, three, etc. keys. You need to start marking the places where the devices will be installed. The installation height of switches for individual housing is not regulated.

The height of the switch is selected based on ease of use. Previously, the standard stipulated that the height of sockets was 500-600 mm, and the height of switches was 1500-1600 mm.

Now such restrictions do not exist, but previously there were unspoken laws of installation. Which? - find out here. After the installation location has been determined, a perforator with a special crown is used to prepare a place for the plastic box.

A wall chaser is used to cut grooves for installing wires. All that remains is to install the wires and install devices, for example, a single-key switch for hidden wiring.

How to properly connect a switch

In order to correctly connect electrical appliances, you must follow simple operating and safety rules:

• Never start work unless you are sure there is no voltage in the network;
• A neutral wire always comes to a chandelier or light bulb;
• The phase must always be supplied to the switching devices.

These conditions must be strictly observed if the light bulb needs to be replaced during operation.

An electrician, when replacing a lamp, if he accidentally touches live parts, will not be struck by an electric shock. Since phase voltage is not supplied to the lamp when the electrical switch is turned off.

How to install a light switch

Installing the switch should not cause much difficulty for a specialist. The simplest is to connect a single-key switch.

To do this, it is necessary to install the wires according to the project. The wiring diagram for a single key switch consists of a lamp, an electrical switch, a junction box, wires and a power source.

In our case, this is an electrical network with a voltage of 220 volts. In a correctly assembled circuit, a phase is supplied to the switching device. This is due to safety regulations. The neutral wire goes to the light bulb.

The lamp can be a chandelier consisting of several light bulbs connected in parallel. All wires come into the junction box, where they are connected according to the connection diagram.

To avoid short circuits, it is necessary to follow the rule of color connection of wires.

How to connect a two-key switch

The connection diagram for a two-key switch is not much different from the connection for a single-key switch. The main difference between one device and another is that a two-key device controls light devices that have two light circuits.

That is, a chandelier with five arms is installed, the first key controls two lamps, and the second three. Installing a two-key switch is practically no different from single-key switches.

In order to connect a two-key switch, it is necessary to lay another wire, with which the second circuit will be controlled.

Summarizing what has been said, we can conclude that the circuit for connecting a switch to a light bulb is a set of wires, a light bulb and a switching device. And the connection diagram for a two-key switch includes one more wire.

How to connect a double switch

The connection diagram for a double switch for two light bulbs is a connection to a switch to a common phase contact. Two wires come from it and go to the lamps. Each on its own circuit.

A common wire comes from the chandelier, connected to zero. In a similar way, you can connect a double-circuit chandelier to a double switch. To do this, just run two wires from the chandelier into the switch box.

Two wires are also supplied from the electrical switch, connected to different keys. In the box they are connected to the wires from the lamp. In the same way, a double switch for two light bulbs is connected.

The only difference is that instead of a chandelier, two light bulbs are used, which are connected in parallel. The connection diagram for a two-key switch is organized in the same way.

From this we can conclude that the connection diagram for a switch with two light bulbs is not technically complicated. And a similar circuit that makes it just as easy to connect a chandelier to a double switch.

How to connect a three-key switch

In addition to single-key and two-key electric switches, three-key switches are used. The main difference is the presence of an additional switching mechanism with contacts.

It is designed to control large chandeliers with three lamp circuits. Most often, the third key is used to turn on the decorative lighting of the ceilings.

The connection diagram for a three-key switch differs from the connection for a two-key switch in the presence of an additional wire from the chandelier and an electrical switch, which comes to the junction box, where they are connected accordingly by twisting or using special clamps.

How to connect a triple switch

Connecting a three-key switch is no different from installing a triple one. These are exactly the same devices, made using the same technology.

The only difference is the appearance. It plays a role only when selecting devices for the interior of the room. For connection, a triple electrical switch connection diagram is used; a phase wire is connected to it.

It is connected to a common terminal, and the three wires passing through the box are connected to the light source. To which, on the other hand, a neutral wire is connected to a common contact.

To ensure that the lighting in the apartment is turned off, a separate circuit breaker connection is used. This ensures that the voltage is switched off during lighting repairs.

Often, for comfortable use of lighting devices in the dark, backlit switches are connected. They are used to avoid searching for devices in the dark.

They have built-in LEDs that glow when the devices are turned off. Some of them have two LEDs, one - red when the device is off, and green when on.

Safety precautions

During installation work, you should remember that you cannot connect zero to the switch, and during repair work you must check that zero or phase is supplied to the contacts.

The check must be performed for your own safety. To avoid accidental exposure to voltage when replacing a light bulb or repair work.

If you do not have the skills to work with electrical appliances, you should contact a specialist who will competently install a single-key switch for hidden wiring. The electrician will agree with the customer on how to properly install the light switch and advise at what height they should be installed.

Source: https://electriktop.ru/baza-znaniy/podklyuchenie-vyklyuchatelej-sveta.html

How to connect a light switch?

Today, there are light switching devices with one, two and three keys. In fact, connecting them to the network is quite simple, the main thing is to understand a little about electrics and know which wire should go where. Next we will look at how to connect a light switch with one, two and three keys yourself, but first we will talk a little about where each of the models can be used.

Type of fittings

I think any novice electrician knows about the purpose of a light switch. A conventional single-key product allows you to de-energize the entire group of lamps connected to it. This design option is usually installed in any room that has one group of light bulbs.

The purpose of the two-key model is to control a lamp that has two groups of light bulbs. For example, for lighting in the kitchen, several spotlights are installed above the countertop, and several above the dining table. When cooking, it is not necessary to turn on all the lights, but just illuminate the countertop.

The operating principle of a three-key product is similar to the previous one, only in this case it is possible to regulate three groups of light bulbs. Typically, a three-key light switch is connected in living rooms and bedrooms to adjust the lighting of multi-arm chandeliers.

Now we will look at how to properly connect a light switch with one, two and three keys, providing brief step-by-step instructions, all the necessary diagrams and video lessons that should be understandable even for electricians dummies.

Preparatory activities

Before you start connecting, you need to prepare all the materials and tools, as well as carry out several actions that are necessary for the safety of electrical installation work.

First, let's define the main points:

1. Method of connecting wires in the junction box: soldering or wago terminals.
2. Before connecting the light switch, you must turn off the electricity in the house (or apartment) and make sure that there is no current in the network using an indicator screwdriver.
3. The instructions will be provided step by step, from the stage when the groove is prepared and the socket box and junction box are installed in their places. You can learn more about these processes in the article: installation of electrical wiring in the house.
4. The phase wire (L) must be connected to the light switch, not the neutral wire (N). This is due to the fact that the voltage travels in phase. If the wiring is connected incorrectly (if you supply zero), you may receive an electric shock when replacing the light bulb.
5. Before starting work, you should familiarize yourself with the color marking of the wires in order to correctly connect the wires to each other (phase to phase, zero to zero).

Among the tools and materials for connecting the light switch you will need:

• a set of screwdrivers (curly, straight, indicator);
• connector (if soldering, then soldering iron and solder);
• pliers;
• sharp knife.

Having familiarized yourself with all the necessary information and prepared all the tools, you can proceed to the main installation process!

Wiring

When connecting a single-key, two-key and three-key switch with your own hands, the wiring diagram from the junction box to the lamps will be slightly different. Now we will look at each of the options!

One key

It's easiest to connect a single-key switch yourself. The distribution box includes two wires - neutral and phase.

Scheme without grounding Scheme with grounding loop

The input zero (blue) is immediately connected to the zero of the lamps (see diagram). The input phase first goes to the switch, then back to the box and after that it is connected to the light bulb phase. That's the whole wiring diagram for a single device. As you can see, there is nothing complicated, the main thing is not to confuse the wires with each other (which happens very often, despite the fact that there are only two wires in the wall).

connecting a single-key switch

Two keys

The connection diagram for a two-key switch is slightly different. This is due to the fact that the circuit will be broken for each group of lamps separately. As in the previous case, the distribution box will include two cores. The blue conductor at the entrance to the box is immediately connected to the rest of the blue wires.

The phase is first pulled apart by two buttons, being fixed in a special input hole. Two outgoing wires go to each group of lamps (or just two light bulbs).

Please note that there are 3 pins on the back of the case: two on one side and one on the other (see picture below). Here you need to be careful and not confuse anything: where there is one input, you need to connect the incoming phase, and where there are 2 holes, the outgoing phase wires going to the lamps should come out.

Entry holes on the body

Visual video instructions for connecting a dual device:

instructions: installation of a two-key switch

Three keys

The connection diagram for a triple light switch is similar to the installation of a two-key product. The zero, as in previous cases, is twisted with the zeros of all three groups of light bulbs. The input phase is directed to the break, and from there it is divided into three separate phase conductors, each going to its own group of lamps.

We provide you with a visual diagram:

Installation instructions:

installation of a three-key switch

Product Installation

Previously, we looked at the rules for connecting wires from the junction box; now we need to secure the housing to the wall. In this article we consider the installation of a hidden enclosure. The socket boxes should already be installed in the grooves and the wires should be wired.

All you need is to fix the cores with special screws and carefully insert the core into the socket box, as shown in the photo below.

Fixing contacts in the housing

There are 2 screws on the sides that open the fixing side tabs. Using a curved screwdriver, tighten the screws one by one, making sure that the housing does not warp during installation.

Placement in a groove

When the core “sits” tightly in the groove, you just need to install the top decorative cover and check the functionality of the product.

Final step

That's all the instructions for connecting a light switch with your own hands! If suddenly any of the points were not clear to you, ask our specialists a question in the “Questions to an Electrician” category. We also recommend that you watch video tutorials that will allow you to see the whole process more clearly!

Similar material:

Source: https://samelectrik.ru/kak-pravilno-podklyuchit-vyklyuchatel-sveta.html

How to connect a switch with three keys: instructions for self-installation

When installing home electrical wiring or repairing it, you need to know exactly how to connect a three-key switch to an existing lighting network. You should proceed from how many lamps are supposed to be used in a given line and how to rationally distribute the three key mechanisms among individual loads. To understand how 3 key switches are connected, you will need to familiarize yourself with their design and specific application.

Design and application features

A three-key switch allows you to change the level of illumination in the room by turning on the required number of devices

Structurally, the 3-key switch is a standard toggle-type mechanism, consisting of three identical units. When the position of one button-key changes (by pressing its top edge), the internal switch closes this chain. When pressing on its lower part, the system returns to its original state when the electrical circuit is open.

The same processes occur when you press the remaining two keys of a three-button device.

The design feature of this mechanism is that its lower contacts are combined into one block, to which a common phase wire is supplied. And the upper terminals are made separate, which allows you to connect three different loads to them.

The standard connection of a 3-key switch involves the following switching options:

• When you press one of the keys, phase voltage is supplied only to the circuit extending from the corresponding contact towards the load. A separate light bulb or group of illuminators is connected.
• If you press two buttons at once, 220 Volts are switched to wires that are connected to two chandelier bulbs, for example.
• When all the key mechanisms are moved to the upper position, the phase is supplied immediately to three load lines with lamps included in them.

After moving the entire changeover system to the lower position, the voltage from the upper electrical contacts of the switch is completely removed. All the lights of the chandelier controlled by it go out.

A three-key switch can be switched on in different patterns and be activated either partially or completely. The latter case is in demand when it is necessary to increase the illumination of the room to the maximum.

Switching order and schemes

Connection diagram for individual rooms

The order of laying and connecting the conductors suitable for the switch depends on the method of its inclusion in the switched circuit. According to the connection diagrams used for light switches with three keys, the following options are possible:

• Only a phase wire is supplied to the device, switched for three different loads. The zero wire was laid to the chandelier from a nearby distribution box during the construction stage.
• For connection, a phase wire is used, running together with the neutral conductor from the nearest outlet.

In the first case, the supply wire is embedded in the wall (with hidden electrical wiring), and its end protrudes outward. Its length must be sufficient to allow the end to be connected to the common terminal of the switch. Three outgoing conductors are laid along the wall surface to the appropriate load through the distribution box.

The second method is used when connecting triple switches with a socket in old houses, where full-fledged distribution boxes are most often absent. In their place, under the ceiling, there is a plastic box with twists placed inside.

In this circuit, both a phase and a neutral are taken from the socket, and the latter is routed bypassing the switch and, together with the phase conductor, is connected to the existing twist. From there they are crossed together onto the lighting fixture. When making connections in a distribution box or twist, you need to carefully monitor the color of the insulation of the conductors that are suitable and extending towards the lamp.

Neutral conductors usually have light blue (blue) insulation, and the protective coating of phase wires is either red or brown in color. Switching of a pair of power contacts is carried out strictly in compliance with color markings.

Regardless of the circuit in which the switch needs to be connected, it can be used for the following needs:

• Connecting a separate chandelier with three or more groups of lamps.
• Switching the operation of spotlights or lighting elements (based on LED strip, for example).
• Lighting control in three rooms from one remote location (a corridor is usually chosen for these purposes).

The main proposed options should be considered in more detail.

Connecting a chandelier and three rooms

When connecting a chandelier operated in a specific room to a three-key switch, the following methods of switching individual light bulbs are possible:

• Each horn is supplied with voltage from one of the upper contacts of the push-button device, which allows them to be turned on separately or together.
• If desired, three light bulbs can be switched according to different schemes (“1 plus 2”, for example), one combination is switched on from one contact, and another from the second.
• Switching on, practiced when using 5, 6 or more light bulbs in a chandelier. They are all divided into groups.

When controlling lighting in three adjacent (non-passage) rooms in an apartment or private house, the switch is placed in a common corridor near its exit. In this case, the lighting is turned on as needed in one of the rooms, in two rooms or in all of them at once.

Connection errors

Supplying a phase wire from the top of the switch is considered an error requiring rework

Before replacing a three-key switch in your apartment, it is advisable to familiarize yourself with the typical mistakes made during this operation. Main violations in connecting a new device:

• The phase wire is supplied not from below, but from above the switch, which is considered unacceptable and will require rework.
• The switch is not built into the phase line, but into the neutral circuit. This is a gross violation of the requirements of the PUE and can lead to an accident (electric shock).
• The wires coming from the switch are connected to the lighting device not through a junction box, but directly.

The last violation will lead to the inconvenience of redistributing individual lighting groups when the need arises, for example, when repairing or replacing a chandelier.

When using a three-key device to switch lighting in three rooms, it is sometimes mistakenly installed in walk-through rooms. For “through” rooms, this type of connection is not suitable; special pass-through type switches will be required.

Source: https://StrojDvor.ru/elektrosnabzhenie/podklyuchenie-trexklavishnogo-vyklyuchatelya-sxema-i-konstrukciya/

Switch connection diagram - how to connect correctly and at what height to install sockets and light switches

How to connect a light switch?

Installing sockets and switches is usually the final stage of renovation, which both new residents of the apartment and people who decide to update their home and make repairs have to go through. You can install the switch yourself, even without the help of a specialist.

How to choose a switch

Light switches come in the following types:

• single-key
• two-key
• sensory
• pulse

A single-key switch is best for connecting a switch.

How to properly connect a light switch - diagram. Connection diagram of a switch to a light bulb

Connecting a switch with one key is not difficult if you follow its connection diagram.

The switch connection diagram is quite simple and looks like this:

How to connect a light switch yourself

As a rule, two wires go from the general electrical panel in the apartment to the distribution box located at a height - zero and phase. A wire similar to the second one is drawn from the switch into the box and connected to it. Connecting wires also pass from the light bulbs and from the switch, which must be fastened together. The “zero” wire is also connected to the same one that comes out of the lamp.

Thus, all the wires from the switch to the light bulbs pass through the box, and it itself serves as a switch, disconnecting the electric current from the light bulb switch by breaking the phase wire through which voltage is supplied. If you connect the wires incorrectly, you can switch the zero. In this case, when replacing the light bulb, the socket will still be energized, which can result in injury.

You can check the wires and determine which of them is supplying voltage using an indicator. After identifying the wires and making the connection, you must correctly connect the switch to the socket box. It should be remembered that in old houses it may be difficult to install modern devices in Soviet-style socket boxes.

Problems arise due to the fact that old and new socket boxes have different diagonals - for modern ones it is 67 mm, while the old ones were designed for the installation of more massive devices and have a diagonal of 70 mm. In this case, additional installation may be necessary to securely fix the switches and sockets.

How to connect a switch. How to connect a switch to a light bulb

To connect the light bulb to the switch you will need:

• switch
• electrical wire
• distribution boxes
• electric indicator screwdriver
• wire cutters and pliers
• insulating tape
• fastener
• socket box
• hammer drill

The diagram for connecting the switch to the light bulb is as follows: all the wires in the apartment, as well as the wires coming from the switch and the lamp, must be connected to the junction box. The working conductor of the network is connected to the working conductor of the light bulb through a switch so that one wire of the socket is connected to the neutral conductor of the network, and the second to the conductor of the wire that comes from the switch.

The diagram for connecting a light bulb to a switch is quite simple. By following this diagram, the switch will be connected correctly.

Correct connection of the switch. At what height should the light switch be placed?

Before connecting the switch, you need to establish the level at which it will be located.

Sockets and switches can be installed at any height. During the Soviet period, sockets were located at table level, and switches were located quite high. Now the sockets are placed low.

This is due to the large number of constantly connected devices and the reluctance to pass bundles of wires in plain sight. Switches also began to be mounted much lower, at a distance of about 1 m from the floor.

Typically, this is to ensure that turning lights on and off in rooms is easy for short people. You can install the switch in the most convenient place for you.

Self-installation of the switch

First you need to install the switch. If the switch is mounted on a wooden surface, you need to install a plate made of plastic or wood. After this, install the junction box and then connect the switch and the wire, insert it into the corrugation, and attach it to the wall.

Install a block with two current-receiving contacts on the ceiling. Insert a piece of wire for the lamp into the corrugation and bring it to the wall with the switch. Place it in a separate box. After this, take another piece of wire, enclose it in a corrugation and lead it into the main box.

Connect the wire with the lamp and socket to the block on the ceiling, wrap the ends of the wires around the bolt. Twist the ends of the wires in the first distribution screwdriver.

Isolate twists. Turn off the electricity, open the ends of the common network and turn on the electricity again. Using a screwdriver, find the zero phase and mark it.

Bring the ends of all the wires into the box, connect them - connect the end of one wire to the neutral phase of the network, the other to the switch wire. Connect the free wire of the switch to the working residential network.

Twist the ends with pliers, insulate them with tape, and put the siza on top. Turn on the switch and check its operation.

How to safely connect a switch. Safety precautions for connecting a light switch to a light bulb

It should be remembered that following all the rules when connecting sockets and following the diagram for connecting the switch to the light bulb will help you connect the switch or socket correctly.

If you need to connect a light switch with one or more keys, very often non-professionals make the same mistake - they connect zero to the switch, not phase.

Thus, a wire supplying voltage passes through the chandelier, and when the light is turned off, the circuit is interrupted, but a zero break occurs, while the cartridge in the lamp remains energized. When changing a lamp, a person acts as a ground and current passes through him.

Therefore, all work on repairing or replacing electrical wiring is carried out by de-energizing the room and following the connection diagrams.

Source: https://remont.youdo.com/articles/electric/viklyuchatelsveta/

How to properly connect a two-key light switch and avoid mistakes

Before purchasing and installing a two-key switch, you first need to decide what it is for? And it is designed to control two lighting circuits from one point.

Don't confuse it with pass-through switches, which have different roles. They differ in the number of contacts. Therefore, when choosing, look first of all not at the front panel, but at the back of the switch.

two-key pass-through light switch

two-gang simple switch

Let’s say if you have 2 or more light bulbs in a chandelier, using a two-key switch you can make it so that when you press one key, only half of the lamps turn on, and when you press the second, all the rest turn on at once.

It can also control two different lamps located at separate points from each other - for example, sconces at different ends of the room or in another room altogether.

The two-key switch differs from its single-key counterpart not only in the number of switches, but also, most importantly, in the number of contacts. There are only 3 of them here. One common and two outgoing. Through them, the phase is separated and then returned to the junction box via separate wires or directly goes to the lamps.

Please note that to install a double switch you will need at least a three-wire wire, even if you do not have a PE protective grounding conductor in your apartment wiring.

There is nothing complicated in the connection diagram and in the process of installation, installation and connection of wires to the switch contacts. First of all, the switch needs to be disassembled. To do this, remove the keys themselves. If you can’t do this manually by simply pulling them towards you, use an ordinary screwdriver, prying the keys off from the side.

Next comes the insulating decorative backing; it can either be snap-on or screwed on. Remove this frame.

As a result, what you have in your hands is the body itself with the fastenings on the sides and the internal contact part. The main task is to supply voltage from the phase conductor to the common contact. Further, when two keys are closed, this phase will diverge into one or the other lighting circuit.

To find the central contact, look at the marking, since it may not always be located alone and in the center.

What to do if you don’t understand the inscriptions or they are erased and painted over?
Then you need to use a contact screwdriver with a battery-powered tester with a continuity test function. Insert any metal object (nail, screw) into the supposed common contact. You wrap your fingers around it and touch the other two contacts with a screwdriver.

When you press the keys one by one, that is, turn on one - check, then turn off the first and turn on the second - check, the screwdriver LED should light up each time. If this does not happen, then this is not a common contact.

When you have dealt with the contact part of the switch, take the three-core cable VVGng 3*1.5. It is desirable that the colors of the cable cores correspond to the color markings according to GOST. How to determine by color which conductor should be phase and which should be neutral by reading the article “How to distinguish wires by color.”

To connect the common contact, use the gray conductor phase coming from the junction box. Strip the end of the core, insert it between the contact plates and tighten the screw with a screwdriver.

Next, connect the other two wires in the cable to the outgoing contact connectors.

Connecting the conductors directly to the two-key switch itself is now complete. Insert the housing into the mounting box and tighten the mounting screws.

Then you tighten two spacer screws, which help the mounting fork with teeth to rest as much as possible against the walls of the box and firmly hold the switch body inside it. After this, you can return all the decorative frames and the keys themselves to their place.

The following cables can enter the junction or distribution box:

• power cable from the machine in the panel
• cable going down to the switch
• one (if you have a chandelier with two lighting circuits) or two cables (if the light points are in different places) to the outgoing lamps

To avoid confusion, follow the following order:

First of all, connect all neutral conductors. They are usually blue. Zero does not pass through the two-key switch and goes directly from the panel to the lamp, through the connections in the distribution box.

All stripped wires can be connected using Wago quick-release terminals. Although everyone has a different attitude towards them, they are an ideal option for lighting circuits with minimal loads.

Next in order is protective grounding. This is a yellow-green wire. If you do not have a grounding conductor in your apartment or the lamp body is insulated and the cable is two-core, then this connection will not be in the junction box.

It remains to connect the phase conductors. Here you need to be extremely careful. First, clamp the phase that comes from the power supply into the Vago terminal block. Then insert a wire into the same terminal that comes from the common phase contact of the two-key switch.

You should have 4 free, unconnected wires left. Two of them are the wiring that goes to the chandelier or sconce, and the other two wires are phases connected to the lower outgoing contacts of the two-key switch. Take two more clamps and SEPARATELY connect these conductors through them. Thus, you will connect two lighting circuits to the lamps independently of each other.

In a lamp or chandelier, terminal blocks are usually used for connection. Place the wires of the cable coming from the junction box onto them according to the color marking.

A factory-made lamp must have cores of exactly the color specified in the rules. Phase - a gray or dark-colored conductor should go to the central contact of the lamp, and zero - blue to the light bulb base itself.

The yellow-green ground connection can be attached either to the terminal or directly under the screw on the housing.

Source: https://domikelectrica.ru/kak-pravilno-podklyuchit-dvuxklavishnyj-vyklyuchatel-sveta/