How to connect three lamps to one switch

This is a good old problem that is given at various interviews as a warm-up. It is quite simple, but requires attention, as well as good logical thinking.

Let's imagine that you are standing in front of a closed room in which there are three light bulbs and all of them are currently turned off. In addition, in front of you there are three switches that are responsible for any of the light bulbs. You can turn the light bulbs on and off as many times as you like, but you can only enter the room once. Also, you don't know which switch goes to which light bulb.

Once you enter a room, you can do whatever you want with the light bulbs, but you won’t be able to go back to the switches. Now the question itself. You need to tell which switch belongs to which of the light bulbs. For example, the second switch works with the 3rd light bulb and so on.

Solution

In fact, everything is very simple here. If we do not have any additional options, then we can do the following. Turn on one of the light bulbs and leave it on constantly. We don’t touch the second switch at all, but we turn on the third switch, wait a few minutes and then turn it off back. Now, when we enter the room, we will find one glowing light bulb, one extinguished light bulb and at the same time cold to the touch, and one also extinguished light bulb, but warm/hot to the touch. Based on this, we can understand which switch belongs to which light bulb.

It is also possible to answer differently. For example, if we have the opportunity to use additional things, then we can supply more current to some switch. Now, upon entering the room, one light bulb will be burnt out, one on and one off. Again, determining which switch belongs to which light bulb is not difficult.

There is a rich house and a poor one. They are burning. Which house will the police extinguish?

Police don't put out fires, firefighters put out fires

How can a person not sleep for 8 days?

Sleep at night

You enter a dark kitchen. It contains a candle, a kerosene lamp and a gas stove. What will you light first?

A girl is sitting, and you cannot sit in her place, even if she gets up and leaves. Where is she sitting?

She sits on your lap

You are standing in front of three switches. Behind an opaque wall are three light bulbs that are turned off. You need to manipulate the switches, go into the room and determine which light bulb each switch belongs to.

First you need to turn on two switches. After some time, turn off one of them. Enter the room. One light bulb will be hot from the switch on, the second will be warm from the switch off, the third will be cold from the untouched switch.

It is known that among the nine coins there is one counterfeit one, which weighs less than the rest of the coins. How can you identify a counterfeit coin in two weighings using a cup scale?

1st weighing: 3 and 3 coins. The counterfeit coin is in the pile that weighs less. If they are equal, then the fake is in the third pile. 2nd weighing: Any 2 coins from the pile with the lowest weight are compared. If they are equal, then the remaining coin is fake

Two people approach the river. There is a boat at the shore that can only support one. Both people crossed to the opposite bank. How?

They were on different banks

Two fathers, two sons found three oranges and divided them. Everyone got a whole orange. How can this be?

The dog was tied to a ten-meter rope and walked 300 meters. How did she do it?

The rope was not tied to anything

How can a thrown egg fly three meters without breaking?

You need to throw the egg four meters, then it will fly the first three meters intact

The man was driving a large truck. The lights on the car were not turned on. There was no moon either. The woman began to cross the road in front of the car. How did the driver manage to see her?

It was a bright sunny day

If five cats catch five mice in five minutes, how long does it take one cat to catch one mouse?

Five minutes

Is it possible to light a match underwater?

It is possible if you pour water into some container, for example, into a glass, and hold the match below the glass

The boat rocks on the water. A ladder was thrown from it along the side. Before high tide, the water covered only the bottom step. How long will it take for the water to cover the 3rd step from the bottom if during high tide the water rises at 20 cm per hour and the distance between the steps is 30 cm?

Never, because the boat rises with the water

How to divide five apples between five girls so that each gets an apple and at the same time one of the apples remains in the basket?

Give one girl an apple along with a basket

One and a half pike perch costs one and a half rubles. How much do 13 pike perch cost?

Traders and potters.

In one city all the people were traders or potters. Merchants always told lies, but potters always told the truth. When all the people gathered in the square, each of those gathered said to the others: “You are all traders!” How many potters were there in this city?

The potter was alone because:

If there were no potters, then the traders would have to tell the truth that all the other traders are traders, and this contradicts the conditions of the problem.
If there were more than one potter, then each potter would have to lie that the rest were traders.

There are two coins on the table; they add up to 3 rubles. One of them is not 1 ruble. What coins are these?

1 and 2 rubles

The satellite makes one revolution around the Earth in 1 hour 40 minutes, and the other in 100 minutes. How can it be?

100 minutes is 1 hour 40 minutes

As you know, all Russian female names end with either the letter “a” or the letter “ya”: Anna, Maria, Irina, Natalya, Olga, etc. However, there is only one female name that ends with a different letter. Name it.

What has no length, depth, width, height, but can be measured?

Time, temperature

If it rains at 12 o'clock at night, can we expect sunny weather 72 hours later?

No, because in 72 hours it will be night

Seven brothers have one sister. How many sisters are there in total?

One yacht goes from Nice to Sanremo, the other from Sanremo to Nice. They left the harbors at the same time. For the first hour, the yachts moved at the same speed (60 km/h), but then the first yacht increased its speed to 80 km/h. Which yacht will be closer to Nice when they meet?

At the moment of their meeting they will be at the same distance from Nice

A woman was walking towards Moscow, and three men met her. Everyone has a bag, in each bag there is a cat. How many creatures were heading to Moscow?

Only the woman went to Moscow, the rest went in the other direction

There were 10 birds sitting on a tree. A hunter came and shot one bird. How many birds are left on the tree?

Not a single one - the rest of the birds flew away

The train runs from east to west, and the wind blows from north to south. In which direction does the smoke fly from the chimney?

You are running a marathon and have passed the runner who was running second. What position do you take now?

Second. If you answered that you are now first, then this is incorrect: you overtook the second runner and took his place, so you are now in second position

You are running a marathon and have passed the last runner. What position do you take now?

If you answered that it was the penultimate one, you were wrong again :). Think about how you can overtake the last runner? If you are running after him, then he is not the last. The correct answer is - it is impossible, you cannot overtake the last runner

There were three cucumbers and four apples on the table. The child took one apple from the table. How much fruit is left on the table?

3 fruits, and cucumbers are vegetables

The product first rose in price by 10%, and then fell in price by 10%. What is its value now relative to its original value?

99%: after the price increase, 10% was added to 100% - it turned out to be 110%; 10% of 110% = 11%; then subtract 11% from 110% and get 99%

How many times does the number 4 appear in the integers from 1 to 50?

15 times: 4, 14, 24, 34, 40, 41, 42, 43, 44 - twice, 45, 46. 47, 48, 49

You have driven your car two-thirds of the way. At the beginning of the journey, the car's gas tank was full, but now it is one quarter full. Will there be enough gasoline until the end of the trip (at the same consumption)?

No, because 1/4

Mary's father has 5 daughters: Chacha, Cheche, Chichi, Chocho. What is the name of the fifth daughter?

A deaf and mute man went into a stationery store to buy a pencil sharpener. He stuck his finger into his left ear and made a spinning motion with the fist of his other hand near his right ear. The seller immediately understood what was being asked of him. Then a blind man entered the same store. How did he explain to the salesman that he wanted to buy scissors?

I just said, he's blind, but not dumb

A rooster has flown to the border between Russia and China. I sat down exactly on the border, absolutely in the middle. Layed an egg. It fell exactly across: the border divides it in the middle. Which country does the egg belong to?

Roosters don't lay eggs!

One morning, a soldier who had previously been on night guard approached the centurion and said that that night he had seen in a dream how the barbarians would attack the fortress from the north that evening. The centurion did not really believe in this dream, but still took measures. That same evening, the barbarians actually attacked the fortress, but thanks to the measures taken, their attack was repulsed. After the battle, the centurion thanked the soldier for the warning and then ordered him to be taken into custody. Why?

Because he slept on duty

There are ten fingers on the hands. How many fingers are there on ten hands?

A plane with English tourists was flying from Holland to Spain. He crashed in France. Where should the surviving (wounded) tourists be buried?

The survivors do not need to be buried! :)

You were driving a bus with 42 passengers from Boston to Washington. At each of the six stops, 3 people got out of it, and at every second - four. What was the driver's name when the driver arrived in Washington 10 hours later?

How about you, because in the beginning it was said that you

drove the bus

What can you find in minutes, seconds and days, but not in years, decades and centuries?

How many times can you subtract 3 from 25?

Once, because after the first subtraction the number "25" will change to "22"

Mrs. Taylor's entire bungalow is decorated in pink, with pink light fixtures, pink walls, pink carpets, and a pink ceiling. What color are the stairs in this bungalow?

There are no stairs in the bungalow

In the ancient castle where the prison was located, there were 4 round towers in which prisoners were imprisoned. One of the prisoners decided to escape. And then one fine day he hid in the corner, and when a guard came in, he stunned him with a blow to the head, and he ran away, changing into different clothes. Could this happen?

No, since the towers were round and there were no corners

The 12-story building has an elevator. Only 2 people live on the ground floor; from floor to floor the number of residents doubles. Which button in the elevator of this building is pressed most often?

Regardless of the distribution of residents by floor - button “1”

A pair of horses ran 20 kilometers. Question: How many kilometers did each horse run individually?

20 kilometers

What can stand and walk, hang and stand, walk and lie at the same time?

Is it possible to predict the score of a football match before it starts, and if so, how?

The score of any match before it starts is always 0:0

What can a person increase in diameter by 7 times in a few seconds?

Pupil. When transitioning from bright light to darkness, the diameter can change from 1.1 to 8 mm; everything else either hardly increases or increases in diameter by no more than 2-3 times

A seller at the market sells a hat that costs 10 rubles. A buyer comes up and wants to buy it, but he only has 25 rubles. The seller sends the boy away with these 25 rubles. change it to a neighbor. The boy comes running and gives 10 + 10 +5 rubles. The seller gives the hat and change 15 rubles, and 10 rubles. keeps it for himself. After some time, a neighbor comes and says that 25 rubles. fake, demands to give her money. The seller returns her money. How much money was the seller defrauded of?

The seller was deceived for a counterfeit 25 rubles.

How many animals did Moses take on his ark?

It was not Moses who took the animals into the ark, but Noah.

2 people entered the entrance at the same time. One has an apartment on the 3rd floor, the other on the 9th. How many times will the first person get there faster than the second? Note: They simultaneously pressed buttons on 2 elevators moving at the same speed.

The usual answer is 3 times. Correct answer: 4 times. Elevators usually go from the 1st floor. The first one will travel 3-1=2 floors, and the second 9-1=8 floors, i.e. 4 times more

This riddle is often offered to children. But sometimes adults can rack their brains for a long time to figure out how to solve such a problem, so you can organize a competition: invite everyone to try to solve the problem. Whoever guesses it, regardless of age, deserves a prize. Here's the task:

6589 = 4; 5893 = 3; 1236 = 1; 1234 = 0; 0000 = 4; 5794 = 1; 1111 = 0; 4444 = 0; 7268 = 3; 1679 = 2; 3697 = 2

2793 = 1; 4895 = 3

The main thing is to look at the problem like a child, then you will understand that the answer is 3 (three circles in the writing of numbers)

Two horsemen competed to see whose horse would reach the finish line last. However, things did not go well, both stood still. Then they turned to the sage for advice, and after that they both rode at full speed.

The sage advised the horsemen to exchange horses

One student tells another: “Yesterday our college basketball team won the basketball game with a score of 76:40. At the same time, not a single basketball player scored a single goal in this match.”

Women's teams played

A man walks into a store, buys sausage and asks to cut it, not across, but lengthwise. The saleswoman asks: “Are you a fireman?” - "Yes". How did she guess?

The man was in uniform

The lady did not have a driver's license with her. She did not stop at the railroad crossing, although the barrier was down, then, not paying attention to the “brick,” she moved along a one-way street against the traffic and stopped only after passing three blocks. All this happened in front of a traffic police officer, who for some reason did not consider it necessary to intervene.

The lady was walking

On one Odessa street there were three tailoring workshops. The first tailor advertised himself as follows: “The best workshop in Odessa!” The second is “The best workshop in the world!” The third “outdid” them both.

“The best workshop on this street!”

Two brothers were drinking at a bar. Suddenly, one of them began to argue with the bartender, and then pulled out a knife and, not paying attention to his brother’s attempts to stop him, hit the bartender. At his trial he was found guilty of murder. At the end of the trial, the judge said: “You have been found guilty of murder, but I have no choice but to let you go.” Why did the judge have to do this?

The culprit was one of the conjoined twins. The judge could not send a guilty person to prison without putting an innocent person there as well.

We were traveling in the same compartment: Baba Yaga, Zmey Gorynych, a stupid ensign and a smart ensign. There was a bottle of beer on the table. The train entered the tunnel and it became dark. When the train came out of the tunnel, the bottle was empty. Who drank the beer?

The stupid ensign drank the beer, since the other creatures are unreal and do not occur in life!)

Most people, after completing their training, breathe a sigh of relief and abandon the tasks and textbooks. But after a few years, they discover that the brain begins to work more slowly and no longer reacts so quickly in emergency situations.

Therefore, experts advise keeping yourself in good shape all the time, and not only your muscles, but also your brain. Logical puzzles can be a pleasant and unobtrusive exercise for the mind. It's amazing how sometimes they can baffle an adult and educated person!

The editors of InPlanet invite you to use your brain a little and solve these puzzles. It is worth remembering that these are not complex mathematical equations, but logic problems, so the answer may be hidden on the surface!

How to connect a chandelier with 3 lamps to a switch with 1 key

Connecting this lighting device to a single-key switch is carried out in several stages. First of all, you need to deal with the wires in the chandelier itself. Here, each cartridge is connected to two wires - phase and neutral, the insulation of which is painted in different colors. Most often, the blue conductor is considered zero, and the remaining colors indicate phase. In accordance with the rules, the phase is connected to the central contact of the cartridge, and the zero is connected to the side.

The chandelier arms are attached to the body, where all the wires are combined. Their distribution for a single-key switch is as follows: phase wires are combined into one group, and neutral wires into another. It should be remembered that zero is supplied to the chandelier directly, bypassing the switch. Subsequently, the nodes of the phase and neutral wires coming out of the chandelier are connected to the corresponding conductors of the electrical network.

The distribution box also has two wires - phase and neutral. It supplies a two-core cable separately to the chandelier and separately to the switch. The lamp is supplied with phase and zero, and the switch is supplied with only phase to both contacts. Closing and opening the contacts allows you to turn the light bulbs on and off.

Connecting a pass-through switch from 3 places

These are generally accepted rules that ensure the functionality of the entire scheme. The switch consists of: a protective part - a key and a frame; working part - mechanism for fixing wires and housing. Space saving.

The switch frame is attached to the mechanism with a clamping insert, which is located in the middle.

The necessary accessories, materials, and fasteners are purchased.

In addition, I explained in detail and showed in a clear, detailed diagram how it all looks in reality.

In addition to pass-through switches, there is another way to control lighting from several places.

Wiring in a residential area You can find out how the ends of the wires in the junction box are connected by watching the corresponding video.

The 1st and 2nd contacts of the crossover switch are connected from the changeover contact terminals. How to connect a three-key switch.

See also: Estimate for installation of electrical equipment

How to connect a chandelier with 3 lamps to a switch with 2 keys

Before installation begins, you need to decide which lamps will be turned on by each key. In this case there are very few options. As a rule, one key turns on one light bulb, and the other turns on two at once. You can also change the functions of the keys among themselves for ease of use.

Typically there are 3 conductors or a three-core cable coming out through the floor slab. In modern houses, 4 yellow ground wires with a green stripe are added to them. The remaining wires are determined using an indicator screwdriver with the switch in the on position. The wire on which there is no voltage will be zero, and all the rest will be phase.

In the chandelier itself, the phase wires can be combined in advance into groups. Of the three bulbs, two are connected to each other to turn on simultaneously. If this is not done, the wires must be distributed independently. Next, the neutral wires of the chandelier and the network are connected to each other. Then the phases of the chandelier and the switch are connected. After this, a functionality check is performed.

If you need to change the functions of the keys, just swap the wires. If both keys are turned on at the same time, all the lights will light up at once. All connections are made with the protective device disabled.

Logic problems

Pentamino

Four by five is twenty: use any four pentomino shapes to create a 4 x 5 rectangle.

How many solutions does this problem allow? (The side of the cell is considered equal to one. Each pentomino figure consists of 5 squares).

Correct answer You can assemble 4 rectangles

3 lamps and 3 switches

There are three lamps hanging in the room. In the next room where you are, there are 3 switches. The rooms are separated by a light-proof door. Question: how to determine which switch turns on and off which lamp, if you can only enter the room with lamps once, and at that moment you cannot touch the switches. Answer

You must first turn on one (first) switch for 5-10 minutes, after which one light bulb will become hot. Then you need to turn off this switch and turn on any other of the remaining 2 (this is the 2nd switch). And immediately go into the room. The lamp is not turned on, but is still hot, and is turned on by the first switch. The lamp is turned on by the second switch. And the remaining switched off lamp is turned on by the last switch.

How to connect a chandelier with 3 lamps to a switch with 3 keys

This diagram is an expanded version of the previous connection, and all the main steps remain the same. In this case, four wires come from the ceiling, and there are three or more in the chandelier. The fourth yellow-green wires relate to grounding and are designated PE. They just need to be connected to each other. If there is no ground wire in the chandelier, then the same wire on the ceiling must be cut and carefully insulated. The remaining conductors are connected according to the same scheme described above.

In some cases, the fourth wire coming from the ceiling can act as another phase. This option is most suitable when using a three-key switch. It makes it possible to control all the light bulbs in the chandelier. A three-key switch makes it possible to turn on and off each independent group of lamps. To do this, you will need another free core in the ceiling wiring, which has already been mentioned. All actions will be the same as for the two-key design. The phase of the home network is connected to the input contact of the switch, and from the output the phase goes to each group of lamps.

When installing a switch, you must follow electrical safety rules to avoid electric shock. Therefore, before performing electrical installation work, you need to disconnect the entire electrical network. You can check the absence of electricity using an indicator screwdriver.

Thus, connecting a chandelier with three lamps is not particularly difficult. The most important thing is to carefully study the diagram and, if possible, use only solid cables, with a minimum number of extensions and twists. As a result, the operation of the chandelier will be long and safe.

From this article you will learn what cross-section of wires is needed to connect to a chandelier, how to ring and determine the phases on the ceiling: we are looking for a ground wire, we are looking for phases and zero, the designation of the chandelier wires.

How to connect a chandelier in a simple way, rules for connecting wires, connecting a 2,3,4,5, 6 chandelier to a single and double switch and many other questions.

DESIGN FEATURES OF THE CHANDELIER

Chandeliers are most often used as lighting devices in residential premises - multi-lamp lamps designed for installation on the ceiling.

A chandelier is a structure that connects several lighting elements - light bulbs - to provide good lighting in the room.

If you use a regular light bulb in a room, then to ensure proper lighting you will need to install a powerful lighting element, and even then, if the room is large, it will not be enough.

But such light is not always needed, so the best option is to use several lamps.

But in the case of using ordinary light bulbs, each of them will have to run its own wire or branch from the junction box.

But if you install a chandelier, the design of which involves installing several light bulbs, then the complexity of the connection will be the same as for one or more light bulbs.

But at the same time, all lighting elements included in the design will be powered, and from one wire.

And all because the wiring branching occurs at the entrance to the chandelier, and not in the junction box.

Well, don’t discount the aesthetic side of the issue. A lonely light bulb hanging on the ceiling looks dull, or maybe a beautiful chandelier.

Read also: Grounding an electrical panel in a private house

To get good lighting in a room with a perfect combination of lighting fixtures with the interior, it is not enough just to purchase a suitable chandelier, you also need to hang it and connect it correctly.

Therefore, next we will consider how to properly connect the chandelier.

WHAT IS TO BE CONSIDERED BEFORE CARRYING OUT WORK?

Let’s immediately identify a few key points that should definitely be taken into account:

Design of a chandelier (They are usually divided among themselves by horns - elements at the end of which sockets for light bulbs are installed. As mentioned above, the division into power branches for light bulbs is made at the entrance to the chandelier, and the horns can be considered these branches. By design, chandeliers are hornless, two-, three-, four- and five-horn);

The switch used (the method of connection depends on this. If, for example, the switch is a single-key switch and when the light is turned on, all the lamps of the chandelier will light up, then this is one connection diagram, but the use of two- or three-key switches, each key of which will be responsible for the operation of a specific group lamps require the use of a slightly different connection method);

The presence of additional equipment in the design of the chandelier (a fan or a remote control unit makes certain adjustments to the connection diagram);
Features of the electrical network of the house (in old buildings, two-wire wiring is usually used, and in new or restored buildings the number of wires is already three).

And one more thing - it’s one thing to simply remove the old lighting fixture and connect a new one in its place, and quite another thing to completely create a lighting power line, including laying wiring from the distribution board, installing switches, junction boxes and lighting fixtures, and then connecting them into one network.

We will not delve into the specifics of independently installing the power supply branch of a chandelier, since we are more interested only in how to connect the lighting elements, although some points regarding wiring will be touched upon.

HELPFUL INFORMATION

Let us immediately point out some features that can help:

Breaking the circuit with a switch is carried out only through the phase line, and the neutral conductor and grounding conductor (if any) go directly to the consumer;
For each branch, a separate phase wire is laid at the output of their switch (It is separated in the switch itself. A single-key switch has one phase conductor at the output, a two-key switch has two, a three-key switch has three). This affects the wire used leading from the switch;
On the terminal blocks of the chandeliers you can find the designation of the terminals, which makes the connection easier (the marking “L” indicates that the terminal is phase, “N” is neutral, “PE” is grounding).

Now directly, how to connect the chandelier to the switch.

Let's assume that the line is made in advance, the switch is in place, and 2 or 3 wires stick out from the ceiling (with the third wire being “ground”).

In general, the connection diagram is the simplest - “one-key switch - 1 lighting fixture.”

If the chandelier is armless (with 1 lamp), then the connection method does not differ at all from powering a simple light bulb.

SINGLE KEY SWITCH – 1 CHANDELIER

Before starting work, you should determine which wire is which. It would be good if modern wiring with color differences between the cores was used. At the initial stage, only “land” is of interest.

If the electricians did not mess anything up, the ground wire will have a yellow-green braid.

But you will have to figure out the phase and zero yourself and for this you will only need an indicator screwdriver, but all precautions should be taken, since the test is done in live wiring.

Therefore, before applying voltage, you should make sure that the ends of the wires are separated in different directions and do not touch each other.

And only after this can voltage be applied (you also need to turn the switch to the “on” position).

After we touch the ends of the wiring with the tip of the indicator screwdriver, the indicator light that comes on when touched will indicate that the core is phase, which means the second one is zero.

If there are three wires at the output, and it is not clear which of them is zero and ground, you can use a test light to determine it (we connect a two-core wire to a regular 220 lamp through a socket). Then we identify the phase with an indicator screwdriver.

And then we connect the light bulb to the phase wire and one of the other two.

If the lamp lights up after applying voltage, then the second wire will be zero (if it doesn’t light up, the “ground” is connected to the control). For reliability, the wires should be swapped.

After determining where each wire is, all that remains is to connect them to the corresponding terminals of the chandelier terminal block, and then secure it to the ceiling hook. In general, everything is as simple as shelling pears.

The diagram for connecting the chandelier to two terminals is as follows:

If the circuit is three-wire, then the connection is made like this:

Now let’s assume that the chandelier is a two-arm chandelier and you need to connect it to a single-key switch.

Each horn is a branch and two wires must come from it (phase and zero), but the “ground” is connected to the body, so it does not go to the branches.

Let's assume that there are blue and brown wires coming from each horn.

To connect the chandelier, you need to separate the wires of the horns by color and twist them together (the blue ones are separate from the brown ones).

Then we connect them to the power line, and it does not matter what color the wires will be phase and neutral.

For example, we connect the brown wires through the block to the phase conductor, and the blue wire to the zero.

Then we isolate everything and check its functionality. Here we note that with such a connection, no matter how many bulbs there are in the chandelier, they will all light up when turned on.

It happens that the third wire in a chandelier or wiring is superfluous (ground is not provided in the lighting fixture or power line).

In the case of a chandelier, we simply ignore this output (this will not affect the performance in any way), but the grounding conductor of the wiring will need to be insulated.

In general, this is a general diagram for connecting a chandelier and it is identical for everyone, but there are some nuances that will be indicated below.

A little about wiring connections. To do this, you can use either terminal blocks or conventional twisting followed by insulation with protective caps.

Each connection method has its own advantages and disadvantages.

Terminals are more convenient for installation, but it is not always possible to install it.

The twist is more compact in size, but it is not always possible to twist the wires well.

TWO-KEY SWITCH – CHANDELIER

Now let's talk about how to connect a chandelier to a two-key switch.

Since the number of lamps and their division into groups can be very different, we will consider several options:

ONE SWITCH – SEVERAL CHANDELIERS

Now let's look at how to connect several chandeliers to one switch. Here you will also have to consider the features of the power line.

For example, let’s take a single-key switch that will power three chandeliers at once.

The lighting line diagram with this switch is as follows: phase and zero go from the switchboard to the distribution box.

A wire goes into it from the phase conductor to the switch, and returns to it again.

As a result, in the box we have a zero and a phase (with a switch included in the circuit), to which we can connect the wiring leading to the consumer.

Therefore, in order to connect three chandeliers to this switch at once, it is enough to throw one common line and insert the phase and neutral wires of the lighting devices into it.

Moreover, it is better to connect each chandelier to a common line in distribution boxes (they additionally need to be installed). And then in the chandelier itself, divide it into horns (branches).

CONNECTING A CHANDELIER WITH ADDITIONAL EQUIPMENT

Now about connecting the chandelier in which the fan is mounted. This lighting device does not require anything special to connect, since the fan is the same consumer as a regular light bulb (that is, the circuit is the same as that of a two-arm chandelier).

It should be connected to a two-key switch so that you can turn off the light or fan if necessary.

Also, when connecting such a chandelier, you should read the instructions, which should indicate which of the wires going to power the fan is phase and which is neutral, and use this information when connecting.

The same applies to chandeliers that have remote control using a remote control.

Inside such a device there will be a special executive unit with a controller that receives signals from the remote control.

So, this unit requires power, and it works on the same principle as a light bulb.

But in chandeliers with LED lamps, the lighting elements operate from a 12V network with direct current. And for this purpose, the design of the lighting device contains a step-down transformer, which has phase and neutral terminals.

Connecting this chandelier is as easy as connecting a regular light bulb.

Sometimes there is a need to install a combination switch to power the chandelier, combined with an outlet.

And here the whole peculiarity lies precisely in connecting the switch itself, and not the lighting device.

Since there is an outlet, in order for it to function, both phase and zero must be supplied to it.

And if only a phase conductor was routed to a conventional switch, then a neutral conductor will also have to be routed to the combined switch. The connection diagram for such a switch is presented below.

There are times when the part of the supply wiring protruding from the ceiling is not enough to connect the chandelier. In this case, you can simply increase them.

To do this, you can take two pieces of copper wire with a cross-section of at least 1.5 mm. sq. and connect them to the line terminals using twisting. Then the connection points should be properly insulated.

SAFETY

When connecting a chandelier, do not forget about safety precautions. All work should be carried out only with de-energized wiring. Moreover, simply disconnecting the line at the switch is not enough; it must be de-energized at the distribution board.

You need to be very careful about the distribution of wiring before connecting.

If the instructions contain recommendations for connection, they must be followed.

All connections must be of high quality. If terminal blocks are used, then the clamps should be tightened well, and in the case of twists, the wires should be tightened with pliers. All exposed connections require high-quality insulation.

Functionality checks should only be carried out after all connections have been isolated.

Often a situation arises when it is necessary for the light bulbs in one of the rooms to be turned on from different places. For such cases, on flights of stairs there are pass-through switches, which are difficult to install, so it is usually impractical to install such switches in apartments.

It is much easier to turn on several light bulbs from one regular switch. How to connect two light bulbs to one switch will be discussed in this article.

Do-it-yourself pass-through switch (PV) 3-point connection diagram

The principle of a cross-disconnector A cross-switch is similar to a regular single-key switch, the only difference being the presence of four terminals inside. Having done this work once, there will be no problems understanding the process.

After a visual inspection, it is necessary to check and accurately determine which wires are phase and neutral. It is not an opening, but a phase switching to another line. They both contain inductive ballasts L1 and L2.

In order to install a cross switch you will need: Distribution boxes, their number depends on the area where this lighting control system needs to be implemented. An important rule is that the switch must always open a phase.

How to connect a hob is written here, and how to install and turn on a water heater is written in this article. Using them together with cross switches, you can control lamps and lighting from several places. The first option has three contacts. When a signal is received, it closes the lighting circuit.

We recommend: Connecting a two-button switch

Therefore, today we will examine in detail the topic of how to connect a three-key switch. Another question is how complex such decisions are. If during the test it was discovered that the lamp was burning at full intensity, while lamps were burning in other places at the same time, then this place will be the phase break where the switch should be installed.

Main types of closing devices Switches, including triple switches, depending on the control method, come in keyboard and touch versions. But for the commercial sphere or production environment, solutions of this kind are in demand.

What is needed to complete the task

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 lamp and the lamp lights up. If you think about it, everything is not so complicated, and the connection diagram for a pass-through switch from 2 points is generally simple. The phase is connected to the input of one of the pass-through switches with three inputs.

To avoid becoming a victim of an accident, you must adhere to the recommendations and rules of safe installation. We collect the wires in the box. In this case, it is important to find a common wire. That is, their operation is similar to the operation of a conventional double switch installed in the living room and designed to turn on the lamps of a large beautiful chandelier. The power is turned off at the distribution board of the apartment building. Connection of pass-through switches from THREE places

Switch device

The main element of the switch is the working part, mounted in the socket box. It is a metal structure with an attached drive. The drive is used to turn the device on and off. The drive is a moving contact that closes and opens an electrical circuit between two static contacts.

Read also: Telpher control panel diagram

The first contact is called incoming: it is connected to a phase from the mains. The second contact (outgoing) is connected to the phase conductor coming from the lighting device. When the switch is positioned correctly, both fixed contacts are initially in an open state. When you press the device button, the moving contact provokes the closure of both fixed contacts. As a result, current flows through the closed circuit of their electrical network to the light bulb, and it lights up.

To ensure safety, the working part of the switch is housed in a housing made of dielectric material. The cases are made of plastic or porcelain.

Other components of the switch are the frame and keys. These elements are usually made from plastic. The keys are fixed on the drive of the working part. Moving as a result of pressing, the key changes the position of the contact, which leads to turning the light on or off.

The frame is designed to prevent a person from accidentally touching the switch contacts. In other words, the frame acts as a barrier between the energized elements and the person. The frame is fixed with screws or latches made of plastic.

The only difference between a two-key device and a single-key device is the presence of a pair of output contacts. Each contact is connected to a phase conductor of one of the lamps.

Regular switch for one lamp

The figure below shows a diagram of connecting a light bulb to a regular light switch.

The switch is installed in a phase gap. Zero is directed to the lighting fixture. If you set the switch to zero, the contacts will soon burn out. The reason is the increased load when electricity passes through the zero contact.

Another reason for breaking a phase conductor is the need to quickly disconnect voltage from the consumer in the event of an emergency. Zero does not allow the system to be de-energized, but only opens the circuit.

Note! Electrical installation work should only be carried out in a de-energized electrical network. If it is not possible to determine the phase conductor by color scheme, it is allowed to supply current to carry out “ringing”. Before checking, you need to make sure that there are no short circuits in the exposed wiring.

Two lamps per switch

The diagram for connecting two lamps to one switch is similar to the rules for connecting one lamp. The neutral conductor is sequentially directed from the junction box through all lighting sources. The phase wire running through the switch is connected to the second contacts of the light bulbs.

The contacts must be connected as securely as possible. It is recommended to use terminal blocks. Connections are made with screws or Wago blocks (the conductor is pressed with a spring).

Note! It is unacceptable to twist wires of different metals (copper and aluminum). Otherwise, the result of such actions will be an oxidation process, which will lead to loosening of the contact and overheating.

The diagram below shows the connection of two light bulbs to a single-key switch.

Each light source has a marking indicating the load limit. This information must be kept in mind when calculating the total power of connected lighting fixtures.

Separate lighting

A similar scheme is often used in office buildings, where it is necessary to separately illuminate many local areas. The separate lighting scheme is not particularly complicated, although it requires special knowledge.

The switch is placed in a phase break. The devices are equipped with one input and two output voltage contacts. The phase wires after the switch go to the lighting fixtures. The neutral conductor will be common to all light sources in the room.

As a result, pressing one of the keys turns on only the devices connected to a specific phase. Other light sources do not turn on.

Chandelier with multiple arms

To connect a multi-lane lighting device using a two-key switch, you will need a three-wire conductor. One core is shortened so that it goes into the junction box, and a couple of other wires should reach the switch.

The phase wire is directed to the breaker. The outgoing conductors are fixed in the terminal blocks of the switch. The lighting device comes with an output of three wires: neutral and two phase. The zero from the distribution box is directed to the zero contact, and the outgoing wires from the switch are connected to the phases of a multi-arm chandelier.

The connection diagram for a chandelier with five arms is shown in the figure below.

The result is a connection where pressing one key only turns on a pair of lamps. Another key controls three lamps. If you want to turn on all the lights, you must press both keys. Ultimately, this design provides a choice of three light intensity options: with two, three or five bulbs.

In retail chains there are switches with three keys. Their connection diagram is a little more complicated, but generally similar to those given earlier.

Correct circuit of pass-through switches

This operation can be performed without the use of special tools. Diagram of a two-lamp lamp As a result, the total pulsation of the light flux of the lamp is reduced.

There is an opinion that to install intermediate switching points for lighting fixtures, you should use exclusively a four-core cable. As a rule, they come with a special converter that powers these lamps. If such switches are installed indoors, the wiring should be done as shown in the figure below.

Also, according to the latest standards, all connections occur only in installation boxes and using contactors. The green circle is nothing more than a distribution box, inside which the wires are connected. The first number indicates the degree of protection from dust, the second - from moisture, on a 6-digit scale.

The construction of such circuits is usually carried out using a so-called cross switch. Two wires come to it from the junction box or from the outlet.

Why are pass-through switches needed?

You can turn on the light when leaving the house - after finishing your work, there is no need to walk in the dark. You only need one. Where is the three switch system used?

Connecting wires to a three-key switch There are various models of triple switches: for external, internal installation or combined - in one housing with a socket. The phase reaches the upper contacts of the switch only when the contact of the corresponding key is closed. Here, a double switch is connected to the output voltage of the inverter, and the inverter itself remains constantly on, which is not good.

How to connect is indicated in detail in the diagram. Knocking out one technological niche in the wall to accommodate an installation box instead of several. Cannot be used separately, but only with a pair of pass-through switches. In order to install a cross switch you will need: Distribution boxes, their number depends on the area where this lighting control system needs to be implemented. Connection diagram for pass-through switch

Connection from an outlet

In some cases, you need to connect an additional lighting fixture with a dedicated switch. In this situation, connecting from an existing outlet will do.

When installing a single-key switch, you will need a two-wire wire and a switching device. For a voltage breaker installed above the socket, zero and phase are removed from it. The phase wire is interrupted inside the switch, and the neutral wire is left intact. Other lighting devices in the circuit are provided with power in a similar way to the above circuits.

For electrical installation work, you will need three wires (zero and two phases). For a three-key switch, one more phase core is required.

Connection schemes

Connection diagram for a triple switch
When familiarizing yourself with the connection diagrams for electrical devices, it is more convenient to start with the standard version, in which one phase conductor is supplied and connected to it. From each of the three response terminals, three wires are routed towards the distribution block, which inside the box are switched to the corresponding lighting device (group).

In accordance with the requirements of the PUE, the phase wires must be connected to the lower contact of the switch, and the three wires extending from it to the upper terminals.

On some product models, the input terminals are marked with an arrow pointing inside the housing, and the output terminals, on the contrary.

When controlling lighting in three rooms, three wires are routed from the top terminals to the junction box of each room. From them it is laid to the local lighting fixture (chandelier).

With any method of connecting the wires coming from the switch, you should remember that the zero bus is connected to the junction box separately. From there it is also switched to the corresponding terminal of a chandelier or other lighting fixture.

Phase and neutral conductors are distinguished by the color of their insulation (this marking is standardized by the standard). The former have a red protective coating, and the latter – blue. However, in reality, this correct approach is sometimes violated, so the performer has to hang tags with designations on the wires.