Difference between bushing and cross switches. Variants of use of pass-through switches Types of household switching devices

... How does a switch differ from a switch

Definition

A switch (aka pass-through, rocker switch or backup switch) is a device that switches one or more electrical circuits to several others. Outwardly, it almost does not differ from the switch, only it has more contacts. So, for example, a one-key switch has three contacts, a two-key switch has six (two independent one-key switches).

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Comparison

Unlike a switch, where the electrical circuit is simply interrupted, when the switch button is pressed, switching from one contact to the other is carried out. And instead of interrupting the electrical circuit, contacts are thrown over, and a new circuit is created (therefore, switches are also called rocker switches). This feature allows using a switch to manipulate the same light source from different points. A system consisting of several switches (rocker switches) is called a pass-through switch.

EMAS switch (3 positions) to contents

Conclusions TheDifference.ru

The switch has two contacts and serves to disconnect and connect the electrical circuit.
The switch has three contacts and serves both to connect and disconnect an electrical circuit, and to create a new circuit.

thedifference.ru

What is the difference between a switch and a switch - Helpful Tips

All switches and switches serve one thing - at the right time to close or open the electrical circuit (turn on or off the lighting). These devices are of various types and vary in design. In this article, we will understand what switches and switches are, and how they differ from each other.

The difference between a switch and a switch

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What is the difference between a switch and a switch, or how to control lighting from several places.

Sometimes novice electricians get confused in the terminology, in the diagrams and principles of operation of these two, or rather three mechanisms (since there are also two types of switches), not to mention ordinary customers who themselves are trying to mount, or buy the necessary devices for further installation ... In this article, we will try to shed some light on the difference between a light switch and a switch.

So, switches and switches serve to switch electrical circuits of lighting and household appliances, they also look the same outwardly, the only difference is in the number of contacts on the back. But the switch is for breaking one circuit, and the switch is for switching between circuits. The switch is used to control the light from one place, the switches are used to control the light from two or more places, moreover, to implement control from three places or more, "pass-through" switches are used. Below we will look at the diagrams of how it works:

1. One key switch - switches the phase coming to it and outgoing to the luminaire.

As we can see in the diagram, only two contacts are enough on the switch, one for the incoming phase, the second for the outgoing phase.

2. One-key switch - switches the phase with one of the two circuits passing between the two switches.

Such a scheme is used, for example, in the corridor, by setting one switch at the entrance to the apartment, we can turn on the light, and walking along the corridor, setting the switch at the end of the corridor, turn off the light. As you can see from the diagram, one key switch should have three contacts, one for the incoming (or outgoing phase), the second and third for two circuits between the switches. It is important to note that switches are always used in pairs, and also that a switch can be installed in place of a switch and will function as a switch, but a switch will not cope with the functions of a switch.

3. If we want to turn on the same lamp from three places or more, for example, on a staircase, so that we can turn on and off staircase lighting on any floor, then in addition to the usual switches, “walk-throughs” are used.

Conventional switches are placed in two places, and between them, arbitrarily pass-through switches are placed in series. As can be seen from the diagram, a single key switch has four contacts - two for two circuits between the first switch and two for a circuit between the second.

Hopefully we have clarified the difference between a switch and a switch. And if we have two groups of light (for example, lamps on one and the other side of the corridor) and we also want to turn them on and off in different places, and even either one or the other, or all together? If no more than two on / off points are needed, then it does not matter - firstly, you can install several single rocker switches, and secondly, most manufacturers have two rocker switches, in this case the number of wires and contacts doubles. If it is necessary to control the light from three places or more, then having carried out installation under a two-key pass-through switch, you will face the problem of buying it, since such a switch requires eight contacts, not all manufacturers of ECM offer such products, but all they are, as a rule, in modular series, for example ABB Zenit.

www.lum-art.ru

How an electrical circuit breaker differs from a switch

A switch and a switch are electrical appliances that are designed to perform similar functions. At the same time, these devices are fundamentally different from each other.

What is a switch

The switch is designed to interrupt the electrical circuit. With its help, lighting devices are controlled. Such products operate in an on and off mode. Accordingly, they perform two functions - turning on lighting or an electrical device and turning it off. The simplest example of a product is a one-key switch, which can be found in any room that is illuminated by electric lighting devices. The product closes an electrical circuit and is a means of controlling the lighting.

Switch

What is a switch

Such devices are used to switch the contacts of an electrical circuit. Their work is expressed in the transfer of contacts and the creation of a new electrical circuit. In appearance, the switch is very similar to the switch. However, these devices have a different number of contacts.

Switch (bi-directional)

For example, a standard switch has three contacts and a switch has six. In the on position, the device closes the first as well as the second contacts. And when transferred to the off position, the third and first contacts are closed. Thus, talking about the off position can be very conditional. The switch is always on.

Switch (on state)

Differences

These devices differ in the principle of operation, so they are used in different situations. Among the most characteristic features of switches and switches, it is necessary to highlight the following:

The switch is characterized by the presence of only two contacts. Its work is expressed in the connection and disconnection of the electrical circuit. This is how the light is turned on and off. Meanwhile, the switch has more capabilities. It is able to connect, disconnect the electrical circuit, that is, perform the functions of a switch. But besides this, the switch can also create a new electrical circuit. This is achieved by having three contacts.
The switches are installed in the corresponding rooms and are used to turn on or off the lighting fixtures that are located in the same room. In this case, using switches, you can control the same lighting fixture from several places. An example is the control of luminaires in a corridor. Entering the corridor, you can turn on the light using the switch. And after walking along it and finding yourself at the end of the corridor, with the help of another switch it will be possible to turn off the light.
In order to be able to turn on or off the lighting from three or even more different points, you should use the so-called pass-through switches. In this case, closer to the beginning and to the end of the electrical circuit, one single-key switch should be mounted. And already between them, you can install any number of transition switches.

Thus, the switch is a more functional product. It is great for situations where a fairly large area is illuminated. It can be a long corridor or several flights of stairs. Thanks to the capabilities of the switches, it will be possible to control the operation of lighting devices throughout the entire electrical circuit from anywhere.

Moreover, such places can be determined by the customer himself, when performing electrical work. That is, it will be possible to create a simple, reliable and comfortable lighting control system. In this case, the fundamental difference between switches and switches lies precisely in the number of contacts. This value determines the broader useful capabilities of the switches.

What are the similarities

Despite serious differences, these devices have many common features. Among them, the main ones should be indicated:

They are designed to control lighting and electrical appliances.
These products are of several types. They can be mounted indoors and outdoors.
There are models with waterproof cases. They are intended for outdoor installation, as they are adapted to various weather conditions.

Thus, a switch has a more complex design and more useful features than a switch. At the same time, they are not inferior to switches in strength and design.

vchemraznica.ru

What is the difference between a switch and a switch |

What is a switch and a switch

The circuit breaker is a two-position switching device with two normally open contacts, designed to operate in networks with voltages up to 1000 V. For a household switch, its design is very important - for indoor installation (for concealed wiring, built into the wall) or for external installation (for exposed wiring, mounted on the wall). Switches are mainly used to turn on / off lighting. A switch (aka pass-through, rocker switch or redundant switch) is a device that switches one or more electrical circuits to several others. Outwardly, it almost does not differ from the switch, only it has more contacts. So, for example, a one-key switch has three contacts, a two-key switch has six (two independent one-key switches).

The difference between a switch and a switch

What is the difference between a switch and a switch? Unlike a switch, where the electrical circuit is simply interrupted, when the switch button is pressed, switching from one contact to the other is carried out. And instead of interrupting the electrical circuit, contacts are thrown over, and a new circuit is created (therefore, switches are also called rocker switches). This feature allows the switch to manipulate the same light source from different points. A system consisting of several switches (rocker switches) is called a pass-through switch.

TheDifference.ru determined that the difference between a switch and a switch is as follows:

The switch has two contacts and serves to disconnect and connect the electrical circuit. The switch has three contacts and serves both to connect and disconnect the electrical circuit, and to create a new circuit.

altaiinter.org

What is the difference between a switch and a switch

Definition and differences of the switch and the switch

A house is a place of comfort, a family hearth, where you want to equip everything not only beautifully, but also comfortably. Lighting plays an important role in this matter. Placing lamps, as well as their controls, is not an easy task.

Even a child knows why a switch is needed, but how does it differ from a switch? What happens if you put a switch on / off the light in the apartment, not a switch?

Even electricians with little experience behind them can confuse these concepts, let alone us, ordinary people. Misunderstanding occurs not only in terms, but also in the principles of the mechanisms. If you have already decided to independently install this or that device, study the diagram in detail, understand the differences, then proceed to the task.

It is better, of course, to invite a specialist with work experience, if you have even the slightest doubt, because the wiring in the house, in the apartment must be done 100% correctly.

Switches and switches (there are two types) serve the same thing - they open or close an electrical circuit at a certain time. That is, to put it simply - turn on or off the light. Devices are of different types, differ in performance, and outwardly there are any, just you wish. Basically, at the other end of the electrical circuit, there are lamps and household appliances as an electrical receiver.

Breaker definition

A switch is a switching device operating in power grids with a maximum voltage of 1000 volts. It is a two-position device, has two normally open contacts (one is active - contacts are closed, and the other is passive - open).

It is not difficult to guess that when the switch is on, the contacts are connected, that is, the lamp is on. Conversely, in the off state, the contacts are disconnected and the light goes out. Where it is not difficult to understand which contacts, the manufacturer marks them with arrows.

An experienced electrician will immediately notice that there is no arc suppression device in it, therefore, in the event of a short circuit (short circuit), it will not be possible to turn off the short circuit currents with a switch. Automatic machines are intended for this, but this is a completely different type of electrical apparatus.

Switches are distinguished by the type of execution, which is their main defining parameter.

There are such types:

outdoor installation - wall mounting
indoor installation - wall mounting.

They are also classified by the number of keys - one-key, two-key, three-key, and so on. In control, there can also be switches of different types: touch, key, push-button and so on.

Switch definition

A switch is a device with three or more contacts. The switch switches one or several electrical circuits at once to others, or serves to open the circuit. In other words, when it is on, it closes the first and second contacts, and if the switch is off, the first and third.

This is probably why it was called that - it switches contacts from one to the other. That is, it is not difficult to understand that the switch almost always remains on. If only two contacts are involved in it, then it will work according to the principle of a switch. It is sometimes also called a rocker switch.

Switches are different, for example, by the number of keys:

one-key - goes to three contacts
two-key - for six contacts and so on.

Thus, the difference between a switch and a switch is obvious - the essence is in the number of contacts available on the back. The switch does only one action - it interrupts the electrical circuit, and the switch can switch it from one contact to another, that is, switch.

If you want the light of a lamp, which is located, for example, on a staircase, or at different ends of a long corridor, to turn on and off in several places, then you cannot do without a switch called a crossover. If we are talking about controlling lighting from three or more places, then even several of them will be needed.

Let's highlight these main differences between switches and switches:

different number of contacts;
the switch turns on and off the lighting fixtures in the same room, and the switch can
control the same light source from different locations.

It can be concluded that the switch is a more functional device that allows you to comfortably equip and beat the arrangement of all lamps and household appliances in the interior. The switch is perfect for large, lighted rooms.

The specialist whom you invite to resolve the issue, if you cannot decide on your own, will help with the choice, indicate the equipment that is needed in your case.

finleaks.ru

What is the difference between a switch and a switch

Switches and switches

Today we will consider an interesting topic, we will figure out what kind of switches and switches are, what they are, and what they "eat" with. There are many switches, among which there are absolutely incredible views. There are one-key, two-key and even three-key switches, pass-through, touch-sensitive and in general a great variety of design options. There are also many options for design, color, shape and other factors that affect the appearance of the switch. They also come in open and hidden wiring, but first things first.

The first thing we'll talk about today is the difference between a switch and a switch. In simple terms, the switch either turns on or off, the switch switches accordingly. If a little more scientific, then in the switch there is a phase commutation passing through it to the luminaire. And the switch switches the two circuits together. If it has a through-flow design, it can switch three circuits among themselves. But this is a huge rarity, so we will not talk about it today. That is, by pressing the switch, the light turns on for us, and the phase is connected inside. If you press it again, the light will go out, since the phase will open. If we click on the switch, then our light comes on. And now, for a second, imagine that we are at this moment in the corridor, although no, it is better in the bedroom. It’s nicer to think about the bedroom, and indeed it’s a magical place. So, we have a very large bedroom, and there is a switch at the entrance to it ...

And there is a switch by the bed too. Why, you ask? The answer is really simple. By turning on the light with one switch at the entrance, you can turn it off from the bed with another without getting out of bed. Again, nothing is clear? I explain. The switches are interconnected by two wires through which a phase can be closed. Accordingly, there are two paths through which the circuit can be connected. And there are two points at which you can close or open the circuit. How it works? You ask. In fact, it's simple, the switch does not open anything, it only switches between the two wires that connect them. So it turns out that in one position the switch connects a wire that is connected by another switch in a circuit, and the light comes on. And lying on the bed, you switch the current to another wire, which is not connected on the other side, and the light goes out. Here is such a complex simple scheme.

Another important fact is that there are switches, and there are pass-through switches. Do you want to tell a terrible secret? Are you sure you want? This is the same. Yes, yes, you heard right. A pass-through switch and a switch are one and the same, and even have exactly the same wiring diagram.

Let's now talk about what are the options for switches. There are, as we have already said, one-key, two-key and three-key switches. And with them, everything is very clear. Depending on the number of keys, several lamps can be connected to it. Or, for example, you can turn on the chandelier in three stages. There are also switches with a slide switch, do you remember these earlier on old lamps? Or, for example, do you remember the switches that need to be pulled by the string?

Further, newfangled ways of turning on the light stand apart. There are switches that respond to room illumination or movement, and some switches also respond to noise. Correctly, such switch options are called sensors. But this is more likely for entrances, common areas, rarely anyone uses them in an apartment. Imagine you are watching TV in a room with a switch with a sensor, for example, movement, it turns out you need to constantly move. And therefore, such methods of light control are not popular in apartments and private houses, but they are insanely popular in housing and communal services, as they save energy.

Further, it is fashionable to include touch switches among the newfangled switches. This is a switch that closes or opens the network when touched. The design is not really complicated. Such a switch consists of a touch panel, which, when pressed, signals to a special semiconductor circuit that it is necessary to close the circuit, and it closes it. The same thing happens when turning off only in the opposite direction.

Another very interesting switch is the remote control switch. Such switches are now leaps and bounds towards their popularity. To remotely control such a switch, your apple or green robot will have to acquire a special application. By entering this application from the other end of the planet, you can control the switching on of the light and, in general, absolutely any processes in the house. Such systems are called smart home, which is a completely different story. There are also simpler options, these are switches with a control panel. That is, a switch is built into the wall, but there are no buttons on it, how is that? That's how. The buttons are located on the remote control, which is in your hand, and from it you control the switch. Recently, remote control chandeliers are gaining popularity.

Another switch option is a dimmer. A dimmer is a device that is installed instead of a switch, in the same exact socket. But this is not a simple device, but a magical one. Joke. In fact, the dimmer regulates the power supplied to the lamp, and thus you can control the brightness of the lamps. Can you imagine that you can have your own sunrise and sunset in your room? And if you have kids and they love to do home theater performances, then you can light those performances almost professionally.

It is worth considering carefully the choice of dimmer. You should not buy cheap dimmers, as they either will not regulate the brightness, but moreover, they can also spoil the lamps. Another important fact is that not all lamps are suitable for a dimmer. There are either "Ilyich" bulbs, or special energy-saving and LED lamps. But even special fluorescent lamps are not recommended to be used with a dimmer, as this will shorten their service life. Plus such lamps - they are rare and difficult to find, and they cost "like a cast-iron bridge", forgive me for such a comparison. It is much better to buy LED lamps right away and forget about replacing them for many years. The main thing when buying, pay attention to the lamp box, it must be compatible with the dimmer.

And the last thing we will talk about today is the design of the switches. It is worth noting that in most cases we buy switches in the apartment, and there is hidden wiring. So, all of the above switches have a hidden installation method. But do not despair, any switch can also be found for surface mounting, although if there are push-button versions for open wiring in every store, then you will have to look for others.

The switch for hidden wiring, as a rule, consists of two parts - the mechanism itself and the frame. Also, some switches have the ability to backlight. It is already built into some switches, but sometimes it is sold separately, it is worth paying attention to. Such switches, as you already know, cannot be used with energy-saving lamps.

The result is a great variety of switch options. If we add to this that most manufacturers have frames and mechanisms for hidden wiring of all colors of the rainbow and shapes. Some manufacturers produce the same variety of switches for open wiring. So much for a whirlpool. Until next time!

What is the difference between a switch and a switch

What is a switch and a switch

The circuit breaker is a two-position switching device with two normally open contacts, designed to operate in networks with voltages up to 1000 V. For a household switch, its design is very important - for indoor installation (for concealed wiring, built into the wall) or for external installation (for exposed wiring, mounted on the wall). Switches are mainly used to turn on / off lighting. A switch (aka pass-through, rocker switch or backup switch) is a device that switches one or more electrical circuits to several others. Outwardly, it almost does not differ from the switch, only it has more contacts. So, for example, a one-key switch has three contacts, a two-key switch has six (two independent one-key switches).

The difference between a switch and a switch

TheDifference.ru determined that the difference between a switch and a switch is as follows:

The switch has two contacts and serves to disconnect and connect the electrical circuit. The switch has three contacts and serves both for

For controlling lighting fixtures on stairs or in a long corridor, the conventional single on / off circuit is not suitable. To turn off the light in such a situation, you will have to go back to the only switch in the room. Not too convenient, right?

By installing a pass-through switch that allows you to control bulbs from two places, you will significantly increase the level of comfort in your home or office. We will tell you how to choose the right device and how to install it correctly. In our proposed article, we consider popular connection options.

Before going to a lighting store for the necessary materials, you first need to understand the terminology and various devices for switching electricity.

For most novice electricians, a switch is the same as a switch. However, they are only outwardly similar to each other. According to the principle of operation, these devices differ radically.

Both household switches and switches for light look the same and have uniform housings, but are designed for fundamentally different connection schemes.

A conventional "SWITCH" is the simplest open / close switch. It has one incoming and one outgoing wire. Plus there are two- and three-key devices with a lot of contacts. However, these are just two or three assembled together in a single switch body.

A “SWITCH” is a switching device in which one incoming electrical circuit is switched to one of several outgoing circuits. Often, such a device is also called a "rocker switch", since it has a key to flip contacts from one position to another.

At a minimum, such a one-key device has three contacts (one incoming and a pair of outgoing ones). If there are two keys, then there are already six terminals (a pair at the input and four at the output).

The term "PASS-THROUGH SWITCH" refers to several switches interconnected according to a certain scheme. Such a switch is designed to turn on / off a single light source from several points at once in a room or fenced area with lighting.

It is impossible to make a "pass-through" device out of classic switches in order to save money on the purchase, for this it is necessary to use only switches

As a result, a two-contact switch is designed to break one electrical circuit with a phase through which the lighting lamp is powered. And a three-pole switch is used to create new separate power loops.

The first option is needed to stop the supply of current through any circuit, and the second to switch between circuits. Outwardly, both devices look exactly the same. This is a housing with one or more keys. In this case, the switch can be used in the switch mode, but on the contrary, it is not.

It is impossible to make a three-pin device out of a two-contact device. But it is quite acceptable to exclude the use of one of the chains. But to organize light control from several points, you only need to buy switching devices with three or more contacts.

Types of household switching devices

Switches are available as pushbutton, rocker and rotary switches. The first option is usually used only as a bell at the front door. It is not suitable for lighting control.

But the second type for turning on / off the light in a residential building is just what you need. The swivel version is more intended for production and utility rooms. Such products do not have a very presentable appearance.

By the number of keys, switches are:

one-key;
two-key;
three-key.

They are divided into ordinary (straight-through), combined and (intermediate). The first have three contacts. In the latter, this triplet of terminals is increased by multiplying by the number of keys. And the third entrances and exits have two. The latter are intended for circuits not with two, but with several light switching points.

By the type of control in private houses, light switches are usually used with standard keyboards, but there are also models with sensors and remote control

According to the wire supply scheme, the switches are for open () and hidden (built-in analogs) wiring. The first ones are fixed on the wall with self-tapping dowels, and the second ones are fixed in the socket boxes with the help of expanding legs.

When choosing switches for connection according to the circuit breaker, it is necessary to correctly select the number of keys (one for each connected group). If there are two control points in the plans, then only a couple of conventional three-pin devices will be required.

If more of these points are needed, then for each such place to be included in a single system, you will have to additionally take an intermediate cross device.

In the overwhelming majority of cases, the household switch key has two positions for closing one of the circuit. But there are also modifications with a zero mean state. In this position, both contours are broken.

Marking on the switch housing

On the part of the switch where the contacts are located, there is usually a special marking indicating the characteristics of the switching product. At a minimum, these are the rated voltage and current, as well as the designations of the terminals for the wires.

If the switch is selected for circuits with fluorescent lamps, then its marking must contain the letters "X" or "AX" (on the usual there is only "A")

When the light is turned on in fluorescent lamps, a sharp surge of inrush current occurs in the circuit. If LED or incandescent bulbs are used, then this jump is not so big.

Otherwise, the switch must be designed for such high loads, otherwise there is a risk of burning the contacts in its terminals. That is why it is so important to choose special switches for fluorescent electric lamps.

For installation in a bedroom or hallway, a switch with IP03 is quite suitable. For bathrooms, it is better to raise the second digit to 4 or 5. And if the switching product is installed outdoors, then the degree of protection should be at least IP55.

Terminals for electrical wires on the switch can be:

screw with and without a pressure plate;
screwless spring.

The former are more reliable, while the latter greatly simplify wiring. Moreover, the best option is screw clamps with an addition in the form of a pressure plate. When tightened, they do not destroy the wire core with the tip of the screw.

According to GOST requirements, if the conductor has a cross-section of up to 1.5 mm, then it is unacceptable to use a screw clamp to connect it to the switch, in which the end of the screw turns along the core.

Also in the marking of the switches there are terminal designations:

"N" - for the neutral working conductor.
"L" - for a conductor with a phase.
"EARTH" - for a neutral grounding protective conductor.

Plus, usually with the help of "I" and "O" the position of the key in the "ON" and "OFF" modes is indicated. Also, the case may contain the manufacturer's logos and product names.

Lighting control from multiple locations

There are several schemes for mounting switches to turn on light from different ends of the corridor. The simplest of them implies the presence of switch keys in two remote locations in the room and one supply line for the luminaires.

If it is necessary to make more than two points for switching on the lighting, then the wiring will be somewhat more complicated. But there is nothing particularly wise here either.

If you follow the presented switch connection diagrams, then there will be no special problems with organizing the control of the luminaire from several points - you just need not to confuse the wires

If, using a pass-through switch, it is planned to supply voltage to a chandelier with two or three separate sets of bulbs, then the circuit will become somewhat more complicated. Here you will have to mount switches with several keys, and there are many more terminals for wires.

Scheme # 1: to turn on the light from two points

The easiest way is to control the lighting fixture from two different places in the room. All you need is a couple of standard switches and a few meters of wiring.

Plus, you will need to follow the simplest wiring rules in order to exclude electric shock and ensure the safety of the entire system in the future.

The "walk-through hallway switch" scheme with two switches is the most popular, it is commonly used in corridors and bedrooms, as well as on stairs and verandas.

When implemented, the outputs of both switches are connected by a pair of cores to obtain two separate supply circuits. Then a wire with a phase is connected to the input of one switching product, and a tap to the light bulb is connected to the input of the second.

As a result, at any position of both keys, the common power supply circuit of the "pass-through switch" will be either broken or connected. The light can be turned on and off from two different points.

This solution makes it possible to supply voltage to the lighting device when only one key is turned on. The second, on the other side of the room, always switches one of the existing lines.

Scheme # 2: for two lamps

The first scheme is the simplest and cheapest to implement. It is used most often. However, if there are several lamps in the room or the bulbs in the chandelier are divided into two groups, then this version of the pass-through switch will not work.

If you need to supply power to two separate lines of lighting lamps, you will have to resort to installing two-button switches with six contacts each

In terms of the installation technology and the devices used, this scheme practically repeats the first basic version. Only in this case more wires will have to be laid.

And in order to save at least a little on them, it is recommended to make the supply wire to the first switch in the circuit with a jumper. It will be too costly to pull a couple of individual wires from the junction box.

If there are three lines with lamps, then they change to three-key counterparts. In all other respects, the wiring diagram remains the same, only their number increases.

Scheme # 3: for multiple switches

With two light points and one or more lighting groups, everything is quite simple. It needs wiring and a couple of switches. But if it is necessary to organize control from several places, you will have to purchase another type of switching devices.

If you need to install several switches for one luminaire, then you cannot do without a cross switch. In this device, one of the circuits is a transit

In such extreme switches, ordinary pass-throughs are put, as in the first case. And between them, a cross analogue with four terminals for connecting electrical wiring is then mounted.

When a button is pressed in such a switching device, the connected contacts are opened and immediately crossed into a new supply circuit. In addition to single-key cross switches, there are devices with a large number of keys. They are intended for circuits with several groups of bulbs.

However, in this case, much more wires will have to be connected to the terminals. And here it is extremely important not to confuse anything. For the correct wiring with such a wiring, you must be especially careful.

If one more point of "on / off" is needed, then another cross is installed with a serial connection of wires to the existing ones.

Electricians recommend connecting switches together through a junction box. However, it is much easier to do this directly with a two-wire cable. Practice shows that such a connection is more expedient and does not violate electrical engineering standards. And the consumption of electrical wires with it is seriously reduced.

Practically proven cross-switch connection diagrams are given in, the contents of which we advise you to familiarize yourself with.

Conclusions and useful video on the topic

The nuances of connecting switches so that the lighting can be controlled from several points are few. But they are. And it is impossible to miss them due to ignorance of their appearance when performing installation. To make it easier for you to understand all the intricacies of the schemes described above, we recommend that you definitely watch the videos below.

Everything about pass-through switches - principles of operation and installation:

How to connect a two-rocker switch:

Wiring diagram for pass-through (change-over) switches through a junction box:

The use of walk-through switches greatly simplifies the control of lighting in a large room, making this process more convenient. It is not difficult to independently mount such a system of several switches and wires. You just need to choose the right set of necessary switching devices.

How did you choose a pass-through switch for installation in a country house, office or apartment? What was the decisive argument for you in choosing a device? Please write comments in the block below, post photos on the topic of the article, share useful information and ask questions.

Sometimes it becomes necessary to control light from different places in the same room. This need is especially relevant in long corridors, staircases, basements, and large rooms.

To be able to independently turn on and off lighting devices from several points, you will need pass-through and cross switches. A pair of pass-through devices will provide the ability to control two remote points, and a cross switch will allow you to turn on and off the light from three or more locations.

Functioning principle

Below is a connection diagram for intermediate switches, which provides independent switching on and off of light from two different places.

Zero is connected directly to the lighting device, the phase is connected through a pair of switches connected by a two-core conductor. With two switches PV1 and PV2, the first and third contacts close, as a result, the circuit is closed, and electricity is supplied to the lamp.

To open the chain, press the button of any switch, for example, PV1. As a result, the first and second contacts will close. When you press the button of the PV2 switch, the same thing happens. Thus, we get a lighting system independently controlled from different points.

Cross switch functions

To create multiple control points, the capabilities of loop switches are not enough. You will need to include a cross switch in the wiring diagram. The switch is included in the gap of the two-wire conductor - between the pass-through devices.

The connection diagram of two pass-through switches and one crossover is shown in the figure below.

All contacts are closed. The current flows through the conductors (indicated in red). When you press the button of any of the three switches, the chain is opened. Pressing a key on another device will close the circuit and flow electricity through the blue wires.

The four control points use the diagram shown in the figure below. The circuit uses two pass-through and two cross-over switches.

To control the light, not only keys are suitable, but also motion or pop sensors. However, such devices, for all their convenience, are not without drawbacks:

high prices;
not too high reliability;
false positives.

Varieties of switches

There are two types of cross switches: rocker switches and rotary switches.

Keyboards

Devices of this type are the most common. Switches break one circuit and close another. Standard devices only work with one circuit.

Outwardly, different types of switches differ in the following features:

one-key cross switch has 2 contacts;
straight-through - 3 contacts;
cross - 4 contacts.

The devices are equipped with one, two or three keys. Three-gang and two-gang cross switches are used to independently control multiple strings.

Swivel cross

Switches of this type are not so widespread. They are used to control light in industrial and warehouse buildings, to organize street lighting. Less commonly, rotary crossover devices are used in residential premises. Closing and opening of contacts is carried out by moving the lever.

Overhead and embedded

According to the method of installation, the switches are usually divided into two types - built-in and overhead. Built-in models are installed at the stage of building a building or in the process of replacing box parts. Conductors are laid in wall ducts or fixed to walls. After that, the wires are covered with a layer of plaster or other finishing material.

Overhead devices are fixed to the wall. In this case, there is no need for special channels. Surface switches are not very convenient, as they are prone to contamination. However, the overhead models fit well with modern interiors.

Crossover device characteristics

A wide range of electrical devices for light control is on sale - both Russian and foreign companies. The differences between switches from different manufacturers are mainly related to pricing.

As an example, here are the technical data of the double cross switch:

Voltage - 220 Volts.
The current strength is 10 Amperes.
Construction materials - polycarbonate, plastic, thermoplastic.
The protection class differs depending on the model. Some devices are equipped with a high level of moisture protection.

Installation instructions

Installation work is carried out in the following sequence:

We lay and fix the two-core wire for connecting the pass-through switches.
At the installation site of the cross switch, we leave a small loop, but we do not cut the wire.
We mount the switches to the desired locations.
We bring the ends of the conductors to the pass-through devices - two-core, zero or phase.
We are testing the network for the possibility of control from two points.
We turn off the power supply to the network.
At the installation site of the crossover device, cut off the two-core cable. We put a cross switch in the gap.
We supply power.
We check the network for operability with three control points.

An indoor cross-feed switch is suitable for any insulated two-core cable with a suitable cross-section for the load. For street lighting, double insulated conductors are used.

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A pass-through switch is a special type of electrical accessories, which is also often called a duplicate or rocker switch.

The pass-through switch and the switch differ in that when using the switch, you can only close or open the circuit, while the pass-through switch is equipped with three contacts, as well as a switching mechanism. The rocker switch allows you to control one luminaire or a group of luminaires from different locations.

Scope of application of pass-through switches

A pass-through lighting switch in an apartment or house can be used in different cases:

on the stairs. The switches are located on different floors - a person turns on the light at the bottom, rises and turns it off at the top;
in the bedroom. One switch is located at the entrance, the other at the bed;
in a long hallway. Switches are installed at different ends of the corridor.

In addition, pass-through switches for outdoor lighting are also used, which are mounted to illuminate paths, different entrances, etc.

Types of pass-through switch

Currently, there are several types of switches, both in appearance and in device. There is a one-key version and a two-key pass-through switch, the wiring diagram of which is slightly different.

A double-rocker feed-through switch has six contacts and is essentially a junction of two single-rocker switches. It allows you to control several luminaires and turn them on in stages.

There are also cross switches that have four contacts and allow you to turn on the luminaire from three places. In such a scheme for switching on a lighting device, you will need 2 pass-through switches and 1 cross-over switch.

In addition, pass-through switches differ in appearance - there are pushbutton, rocker, rotary switches and the choice of a particular type depends on the preferences and needs of the owners.

Currently, there are a large number of companies implementing high-quality options, for example, the Legrand switch, the wiring diagram of which does not differ from the circuitry of other brands of switches.

How to design a pass-through switch?

When renovating an apartment or building a new house, you must immediately determine where the pass-through switches will be located. Since the wiring diagram of the switch involves using more cable, therefore, this must be thought through before starting the electrical work.

It is also necessary to decide from how many places you need access to the lamps, and how many devices will be under his control. Once you have identified all the points, you will need a loop-through switch circuit suitable for your plan.

How to connect a pass-through switch?

As mentioned above, the wiring diagram of the pass-through switch with three and six contacts is somewhat different. In addition, the circuit of the light pass-through switch depends on the number of points from which the light can be controlled.

Consider single-key electrical switches. Since the pass-through switches switch from one circuit to another, it is necessary to provide power to the first pass-through switch, and a phase wire will go from the second switch, which is connected to the wire from which the lamp is powered in the junction box. Also, the switches are connected to each other using a two-core cable. See the diagram for details.

If you want to switch lights from multiple locations, the following scheme will work for you. It is similar to the previous one. However, in this case, it is necessary to make two input contacts and two output contacts in the switch.

The wiring diagram for two-button switches is also not very different from single-button switches. In fact, this circuit is a connection of two one-button switches and allows you to control two lighting devices from two places at once.

Where to place the switch? This is a difficult question if you need to turn on / off the light in a large hall with several entrances, or in a long corridor. If there is only one switch, but there is a lot of space, this is inconvenient.

Is it possible to do better - to turn on / off the light from different ends of the corridor or staircase in the entrance, in the local area from the house, garage, from the gate, and so on? In our digital age, radio-controlled consoles, motion sensors and so on immediately come to mind. This is great, but it can be made easier, cheaper, and more convenient. You just need to use a pass-through switch.

Many of us have come across a circuit breaker circuit in a school problem book. In the problem for the seventh grade, it is proposed to draw up a scheme in which you can turn on and off a light bulb at either end of the corridor. To understand the principle of operation of the pass-through switch, we will analyze the solution to this simple problem.

First, a simple one-light-and-one-switch scheme:

Key K1 is closed, the light is on. If you open the contacts, the lamp will go out. Using such devices, the task of turning on and off from different ends of the corridor cannot be solved: even if we can turn on the light with different switches, we will not be able to turn it off just as easily.

Pair of pass-through switches

To solve the problem, you need not switches, but switches, and you also need an additional wire. The switch transfers voltage to one of two wires:

Here, the phase is transferred from pin 1 to 2. If you flip the switch, the voltage from pin 1 will go to 3.

In any position of the switch, only one of the wires will be energized: 2 or 3.

This is the electrical circuit of the pass-through switch: a simple switch.

But for work, at least one more light switch is needed. From the first switch you need to stretch two wires to it.

What happens if we flip switch 1? The circuit will open. And if by switch 2? Same.

This means that the light can be turned off from either end of the corridor. And then it can be turned on by clicking any of the switches. For example, the first:

The single-key switch has no positions On, Off. Any switching of one of the pair of switches changes the state of the system: if the light was on, then it will go out, and if it was off, it will light up.

What to buy to implement the scheme

Understanding how the pass-through switch works, you can independently mount a convenient lighting control circuit. In the market of electrical goods, products of several companies are popular, for example, legrand pass-through switches. They are functional, attractive in design, some with LED backlighting.

Legrand valena pass-through switch, if it is without a pair, can work as a simple one. But usually they are bought in pairs.

Buyers often ask how the walk-through switch looks different from the usual one. There are few differences: enterprises use a single case design for different devices. There are no markings on the checkpoints indicating inclusion (sometimes it is still there, due to the use of standard components, but they do not pay attention to it). Differences in the connection of electrical contacts can be easily determined by a person familiar with electrical engineering.

The figure shows the connection of a pair of legrand pass-through switches operating on one group of luminaires.

Pass-through switches, like conventional ones, are available with one or two keys. Two-key controls two groups of lamps. You can, for example, adjust the brightness of the lighting by turning on and off the groups of bulbs in the chandelier.

Nothing worse than products of other companies: lezard, lexman, abb, Schneider Electric.

Lezard pass-through switches are connected in the same way as those made by legrand and other companies.

It is very easy to assemble a circuit from devices from any manufacturer, but sometimes difficulties arise, since circuits with errors are found on commercial sites on the Internet. Sometimes cheap Chinese devices are accompanied by paper instructions with errors in the diagrams.

Use the simplest diagram that is clear and that you understand.

Turning the lights on and off from ten places

We examined in detail the switching scheme of lamps from two different locations.

But is it possible to make the light turn on and off from three, four places and so on? For example, when leaving an apartment, on any floor, turn on the light on the stairs, and when leaving the entrance, turn it off. And do the same in the reverse order: turn on the light at the entrance to the staircase, and turn it off at your door. Or late at night, leaving the office in the corridor, where the zealous caretaker has already turned off the light, do not wander in the dark, but flip the switch at your door, let there be light! And then turn off at the exit. And so that there are several such switches in the corridor - at different doors.

To organize such lighting, you need to use more complex pass-through switches, they are called cross-type switches. Let's consider their functioning.

A crossover switch is one that has two input terminals and two outputs. A phase comes to one input, an empty wire to the other, in no particular order.

Accordingly, at the outputs we have: on one - a phase, on the other - nothing. By clicking the cross-switch key, we will swap the phase and blank on the output terminals.

If you place a cross switch between two feed-throughs, you get three switching points. Each switch, if you change its state, changes the lighting: if the light was on, then it will go out, and if it was off, it will turn on.

Take a look at the picture. The circuit is currently closed, but what if you click any of the three devices? The circuit between the input and the output will open and the light will go out.

Interestingly, after turning off, we can turn on the light, again by clicking ANY switch.

You can put two cross switches, three, four… in the middle of the circuit. how much it is not a pity. And any switch will change the state of the system.

This may seem surprising, especially since a long chain of switches can be tricky to figure out. But nevertheless, the scheme works! After all, at no position of the switching devices the phase is not "lost" - it comes to one of the two outputs of each cross switch, and only the last pass-through "selects" the phase or its absence.

Clamp-on cross switches are in demand

Pass-through switches are produced in the same housings as conventional ones. There are surface-mounted and built-in models, in versions for indoor and outdoor wiring. Surface-mounted models of pass-through and cross switches are in demand, because they are used in large numbers to improve lighting systems, including outdoor lighting.

When building your home, a convenient switching system with pass-through switches can be included in the wiring project.

New technologies: sensor pass-through switches

Stylish touch switches are more expensive than conventional ones, but they are in demand - they have become a natural part of today's digital culture.

Sensory devices are quite complex electronic devices. A thyristor or a high-power transistor is used to switch the current, and the signal due to which the device opens (or closes) comes from a sensor - a sensor that reacts to any external influence.

The sensor can be a motion sensor, or an acoustic one, or a capacitive one that reacts to touch. Sensitive sensors react even to touch, it is enough to bring your hand to a distance of 1-3 centimeters. In houses, capacitive touch switches are usually installed, or combined with a motion sensor. All sensor devices can be remotely controlled. If the remote control is not included, purchase it separately.

The semiconductor device responsible for turning the current on and off can also be used to control the current strength, the brightness of the light, if equipped with a dimmer. It is important to know that dimmers are not suitable for all lighting fixtures.

Pass-through and cross touch switches, like mechanical ones, are used to control lighting devices from different points. Compared to mechanical ones, they are more functional: they can be controlled remotely, control the intensity of light.

Externally, the touch devices are a smooth glass panel, in the connected state, the indication is visible on it: blue firefly - OFF state, red - ON. To operate the lighting fixture, you just need to touch the panel of the device.

In the photo - a touch switch.

The paradox is that technologically advanced sensor devices do an excellent job of controlling incandescent or gas-discharge lamps, but problems arise when turning on advanced LED luminaires. In the circuit "touch switch - LED lamp" in the off state, weak electrical impulses can be induced, due to which the LEDs "wink". Sometimes there are problems with the dimmer if it regulates the current through the LEDs.

The figure shows the connection diagram of the adapter parallel to the LED lamp.

In this figure, the adapter is connected to a junction box and affects all LEDs included in this circuit.

Let's consider the connection diagrams of the pass-through touch switches.

Shown here is the connection of two sensor walk-through switches.

Shown here is the connection of three pass-through touch switches.

Note that there is the same touch-sensitive switch in the middle as on the edges. That is, sensor devices are not divided into “simple” and “cross-over”.

In the chain of touch switches there is a "main" - which is shown on the left, three wires fit to it (one wire is from the load). Before starting work, the system must be synchronized. After touching the panel of the main device, they wait for a sound signal for 5 seconds. After that, you need to touch the second switch. Synchronization is complete. Then the third, fourth and so on are synchronized with the main switch.

Loop-through socket is very easy

Having become acquainted with the wonderful properties of the pass-through switches, we expect miracles from such an object as a pass-through socket. But there is nothing special here. There is simply a terminal socket (electrical wires fit to it, which do not go anywhere else), and a checkpoint - it is connected to the wiring, to which several more sockets are connected.

Pass-through sockets have neither design nor circuit features. The name simply reflects their place in the power supply system.

What limits the number of pass-through switches

A chain of switches that allows electrical current to be commutated from multiple points should not be too cumbersome. The contacts provide resistance to electric current. It is small, but on a long chain of contacts, the current can decrease noticeably. With a large number of switches turned on one after another, the reliability of the circuit decreases, and malfunctions are possible. Therefore, we rarely find a string of pass-through and cross-over switches of ten or more pieces. Most often it is a pair of switches, somewhat less often - a chain of three, four, five.

Using these devices makes life easier and saves energy.

Types of pass-through switches

So, we looked at different options for this class of devices. In conclusion, we will list their types.

By technology:

mechanical;
semiconductor (sensor, remote control).

By the number of independent loads:

single-line;
multi-line (for 2, 3 groups of lamps).

In addition, there are two types of mechanical switches:

simple checkpoints;
cross.

It is very simple to connect pass-through switches. Good luck!

Installation of a pass-through switch

It should be noted that it is advisable to provide for the installation of such switches during the construction process or during the overhaul of the apartment in order to lay the electrical wiring in advance, because after finishing the finishing work, it will be quite problematic to lay the cable.

For what to produce installation of a pass-through switch initially it is necessary to install the junction box in the required place. First, unscrew the screws from it and carefully break off the plugs of the holes in it for the supply of electrical wires.

Then you can proceed directly to the installation. At the beginning of the work, you need to make sure that the junction box moves freely in the niche previously hollowed out for it. Next, you will need to prepare a solution of plaster of paris (alabaster), mixing it with water until a medium density is obtained.

Using a narrow spatula, a small amount of this solution is placed in a hollowed-out niche and a little solution is applied to the outer back of the box. After that, the box is carefully inserted into the niche, setting it in such a way that the edge of the box is in the same plane with the wall surface.

If necessary, in order to ensure the strongest possible fixation of the box, an alabaster solution is added. Now there is some free time until the plaster is completely solidified.

During this time, you can clean the ends of the electrical wires, removing the insulation from them by 5-7 mm. It should be noted that the total length of free wires should not exceed 10 centimeters. This is due to the fact that an excessively long wire will not allow placing the switch in the box, while it will be problematic to work with an excessively short conductor.

How to fix the pass-through switch in the socket

Disassemble the switch before mounting it in the back box. In most cases, it is enough to remove the key (or keys, if the switch is double or triple), gently prying it off with a flat screwdriver.

A pass-through switch is, strictly speaking, not a switch, but a switch... Although the people call it a switch, because it serves to turn off the light. I will also adhere to folk traditions in this article.

The use of a pass-through switch is very convenient where it is necessary to turn on or off the lighting from different places. As its name suggests, this switch can be installed in aisles. Other application examples are large rooms, corridors, stairs, etc.

In order to turn on or off the light, in this case it is necessary to switch one of the switches (there are usually two of them, but there may be more) to the opposite position.

Connection diagram of pass-through switches

Pass-through switches are always used only in pairs, that is, there can be only two of them in the circuit, but not one or three. The connection diagram in the case of using two pass-through switches will look like this:

Classic scheme of switching on lighting from two points with pass-through switches

In practice, I usually use a VVG 3x1.5 cable, in which there are three wires - white, blue, yellow-green. See installation example below. So, in order not to get confused, I do it according to the rule: the input of the circuit (contact 1 SA1) is white, the second and third contacts are connected respectively in blue and yellow, the output of the circuit (contact 1 SA2) is white. The light bulb is always suitable for white (phase) and blue (zero) wires.

As you can see from the diagram, the EL lamp will light up only when the switches SA1 and SA2 are in the same position - either up or down. When the positions are different, no current flows in the circuit.

Light control from multiple locations: cross switch

There can be only two pass-through switches in the circuit. If it is required to control the lighting from three or more places, then a circuit with a cross (double pass) switch is used:

Cross-switch circuit for lighting from three locations

The cross switch can be made from a double pass. To do this, it is enough to fasten the two keys together and connect the necessary contacts according to the diagram. By using multiple cross switches, lighting can be controlled from multiple locations.

I live on the fifth floor. It happens that when I go up to my floor, I notice that it is dark, and it was necessary to turn on the light on the second floor. On the second one, I did not think about it, since there is a light on there, which turns on on the first. But the scheme given above - for several floors - would completely eliminate this problem - turn on the light in the entrance wherever you want.

In practice, cross switches are rarely used.

If you need to turn on the lighting from several places, then you can (and better and easier) use the stair switch as described in the article about on SamElektrik.ru.

From the checkpoint - an ordinary switch

There are situations when you need to install a switch, and there is only a pass-through switch at hand. The question arises - how to convert a pass-through switch into a regular one?

It doesn't matter, you can set the checkpoint as usual, no difference.

A pass-through switch, if used alone (without a pair), becomes a conventional switch. In this case, one contact is either not used, or the switch can switch two lighting lines to choose from:

Two-key pass-through switch consists of two independent pass-through switches. Using two double pass switches is like using four regular pass switches. The only difference is in the number of junction boxes.

Therefore, if you need to remake the pass-through switch into a regular one, you just need not to connect one of its extreme terminals, otherwise connect it in the same way as a normal one.

Here, just, is the answer to a similar question from the reader (see comments, dated August 16, 2017) - what to do if there are pass-through switches, but ordinary ones are needed?

Here is the circuit shown in the photo of the switch:

In this case, a double feed-through switch is shown (i.e. two feed-through switches in one housing). Contacts 2 and 5 are medium, phase is constantly applied to them. Accordingly, from contacts 3 and 4, the phase is removed after switching, and goes to the light bulb. And zero is supplied to the light bulb all the time.

Maybe it will be interesting too?

If the bulbs are turned on with the keys in different directions, then you just need to connect the bulb to another output contact of the switch. For the left - not to 3, but to 6. For the right - not to 4, but 1.

Important! I'm not quite sure that the middle contact in the switch is 2 and 5. The circuit is drawn somehow implicitly ...

In conclusion, I would like to note one more difference between pass-through switches and conventional ones. The number of wires to the pass-through switch is not two, but three. And four wires must be connected to the cross. This must be taken into account in advance when wiring.

Circuit breaker connection diagram

For an example of connection, we use a two-key pass-through switch Gunsan Visage, a photo of which is shown below:

Two-key pass-through switch Gunsan Visage. Assembled front view.

By the way, there is no backlight in such switches. At least I haven't met.

Removing the keys and decorative panel:

Front view. The contacts of the switch are clearly visible through the transparent plastic - it is immediately clear what to connect to.

Back view. Pass-through switch terminals

During installation, 3 wires must be suitable for the pass-through switch, in our case, 6 for a two-key switch.

Connecting the pass-through switch

There is no need to be afraid of the abundance of wires, the connection of a one-key switch from a two-key pass-through switch differs only in that a two-key switch is actually two single-key switches in one case.

The colors of the wires must be clearly remembered, and it is better to sketch them on the diagram so as not to make mistakes during installation. Above in the quote is a mnemonic rule that is best used when installing and connecting.

We put on the cover, put the keys - and the connection of the pass-through switch is completed!

Updating the article.

And this is more humor ...

Installation variant of the "pass-through" switch

Option to install a "pass-through" switch from different rooms

The checkpoint is, after all, with the ability to turn off from different places, isn't it?

A pass-through switch is used to control lighting from different locations. The 2-point connection diagram is the most common at home, so it will be considered. Versions with manipulation from several places at once are more suitable for commercial and industrial premises.

Two-point lighting control circuit

Taking the principle of operation as a basis, electrical switches of the pass-through type could be called switches. In appearance, it is difficult to distinguish them from ordinary counterparts, because the differences lie in the contact system. They are usually classified according to the method of management.

Keyboards

The main options for operation are presented below.

One device can be installed next to the door, and the other - near the bed. Thus, when entering the room, you can turn on the light for preparing for bed and turn it off without going back.
Next to the stairs, the devices are mounted on different floors. For example, when approaching it, you can turn on the light, and after lifting it, turn it off.
In the corridor, fixtures are usually installed at the beginning and end.

Note! The most important criterion when choosing the presented switch can be considered the number of keys. It must necessarily correlate with the number of groups of lighting fixtures that are turned on at the same time.

Getting to know how it works

Before connecting a pass-through switch with a wiring diagram of any type, it is necessary to understand the principle of its operation. Each device has three contacts, one of which switches from one circuit to another. The principle of operation is based on changeover contacts.

When the position of the switch is changed, the electrical current is redirected to a specific terminal. Only one of the existing circuits remains closed. The lighting device starts to work when both toggle switches are in the same positions.

Pass-through switch: wiring diagram for 2 points of devices with a different number of keys

The most popular scheme for connecting a pass-through switch from two places, but it can be carried out for devices with a different number of keys. They all have a different number of contacts, so some difficulties may arise when connecting wires.

Wiring diagram of a pass-through switch with 2 places in the presence of one key

One lighting group can be controlled from two locations using one-button switches. They are connected according to a fairly simple scheme, which should be considered as a tutorial for a deeper understanding of how they work.

From the central supply line, the phase is connected to the incoming contact of one of the operating switches. The output terminals of the two switches are connected to each other. The second contact of the device is connected to the lighting device, taking into account the given diagram.

The process of connecting two-key devices for two main points

More complex is the circuit with the connection of a two-key pass-through switch directly from two places. This option makes it possible to control two lighting groups at once. Devices with two keys are capable of working in two main directions.

Two-key blocks are mounted in certain places directly in the installation boxes. All lighting groups are located in the required zones. A three-core cable is connected to the light sources (N - zero, L - phase and ground).

Installation, if desired, can be performed using four single switches, but in this case there will be no rationality. The installation of two-key analogs is more profitable, since the cable is saved together with the junction boxes.

The presented circuit of the pass-through switch from two places opens up much more functionality than the one mentioned above.

Prices for products of major manufacturers

The cost of production may vary depending on the number of keys, control method and manufacturer's reputation. The table shows the average prices for two-key counterparts.

Table 1 . Average cost of switches

Image	Manufacturer and model	Price in rubles
	Werkel WL02-SW-2G-2W-LED	556
	ABB BASIC 55	611
	MAKEL Manolya	239
	Schneider electric Sedna SDN0500170	395
	TDM Llama SQ1815-0207	440
	Lezard Mira 701-0701-105	325
	LEGRAND VALENA	496

Livolo products can be distinguished from touch switches. The front side of the devices is usually made of tempered glass, resistant to mechanical stress. The surface is capable of withstanding at least 100 thousand on and off cycles.

LED illumination makes it easy to find the device in total darkness. When touched with wet hands, negative consequences do not occur, since the products are moisture resistant. The price of such devices ranges from 1500-3000 rubles.

There is a possibility of remote control of the device via a special radio channel. Thus, you can turn on and off the lighting from different rooms that are in the range of the remote control. This control option is more convenient than with an IR system operating in the line of sight.

Making a pass-through switch from a conventional analog

If necessary, it is quite possible to convert a conventional switch into a pass-through analog on your own, because outwardly they do not differ from each other. Differences begin only when looking at the internal parts.

Redoing involves adding a contact to a conventional switch, that is, instead of two terminals, you should get three. To do this, you need to take two simple devices: one-key and two-key. They must be from the same manufacturer. In a two-key device, the pins simply change.

Summarizing

To increase the comfort of living, you can purchase or make your own pass-through switch with a 2-point connection diagram. Accessing certain categories of lighting fixtures will help simplify your daily activities. The choice of a specific connection option will depend on the number of sources.

Difference between bushing and cross switches. Variants of use of pass-through switches Types of household switching devices

... How does a switch differ from a switch

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What to buy to implement the scheme

Turning the lights on and off from ten places

Clamp-on cross switches are in demand

New technologies: sensor pass-through switches

Loop-through socket is very easy

What limits the number of pass-through switches

Types of pass-through switches

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Updating the article.

Keyboards

Getting to know how it works

Pass-through switch: wiring diagram for 2 points of devices with a different number of keys

Wiring diagram of a pass-through switch with 2 places in the presence of one key

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Prices for products of major manufacturers

Making a pass-through switch from a conventional analog

Summarizing