In the interior of a house or apartment, everything is interconnected and must be done correctly. Installation of the ceiling covering must be verified with the type and method of connecting the central lighting chandelier. For example, when installing stretch ceiling ceiling lamp is installed at the same time, and when gluing tiles it can be installed much later.
Choosing a chandelier is not an easy task. In the store the lamps seem smaller in size, and it’s not always clear how this or that model is connected, what will be needed for it consumables and how long it will last. But finally, the choice is made!
After the long-awaited purchase of a chandelier, it should be installed and connected correctly. If we talk about a single-key switch, everything is simple. But in some cases, the wiring diagram for a chandelier with a double switch may seem intimidating.
Required Tools
First, let's prepare the working equipment. We will need:
- An indicator screwdriver is necessary to check the circuit and find the phase.
- A set of slotted and Phillips screwdrivers that every owner will probably have. Required for assembly and disassembly of the structure.
- A multimeter is the most important device that will help check the integrity of the connection of individual parts of the network.
- The terminal block will make it easier to assemble the wires when connecting. For household appliances A block with a diameter of 2 to 4 mm is suitable.
All this can be purchased at any electrical center; the rest of the equipment can be found at home: a chair for working under the ceiling, a knife, electrical tape and a marker.
Purpose of wires in a chandelier
Connecting a chandelier requires skillTo determine the purpose of the wires coming out of the chandelier, use the instructions. But if the instructions are foreign language, follow these rules:
- If the wires from several lamps are connected in one terminal block with a contact coming out, this is “Phase-L”. In this case, the connection is usually made in two groups: one combines the wires that connect only a few lamps to the phase, the second connects the remaining contacts. Thus, a circuit is obtained that allows the use of a multi-key switch with the ability to alternately turn on/off each group of lamps.
- Ground contact - PE, usually painted yellow. May be required if the house has central grounding. It is rare in houses younger than 2000.
- Neutral wire - N. A single core to which the neutral contacts from all lamps are connected. Determined using a multimeter or special factory markings.
You need to know that at the moment there is a law on electrical installation work, which prohibits the use of all wire alloys other than copper.
General chandelier connection diagram
If the chandelier is equipped with one or three lamps, and the switch has several keys, then there are three options for connecting this lighting device.
- When turned on, all lamps will light up;
- For switches with multiple keys, you can set the lamps to start one after the other;
- In a multi-arm chandelier, you can create sequential, group starting of lamps or simultaneous using one key.
If two wires come out of the hole in the ceiling, then you can make the first connection option. The manufacturer's instructions must indicate that the chandelier is connected in accordance with its functionality. Basically, luminaires with several lamps combine paired contacts of lampshade connections, which can be connected according to the second principle.
The third connection scheme is considered more complex. The wires are connected in such a way that when the switch is turned on, each lamp lights up individually. In this case, it is necessary to connect all existing wires in parallel order.
Standard scheme connections Connecting a 3-arm chandelier without grounding
Connecting the chandelier to double switch looks a little more complicated. But in fact, everything is simple, just understand the purpose of the wires and connect them correctly.
There are usually two or three wires coming out of the ceiling. In our case, when there is no grounding contact in the house, only two cables are required. You can determine where the phase is located using a multimeter or an indicator screwdriver. It is enough to touch the bare ends of the wire and if the light comes on or the signal goes off, then the wire is live - a phase.
Next step. It is necessary to check the cables leading to the switch and chandelier for breaks. You shouldn’t rely on factory marks and wire color; it’s better to double-check everything yourself.
Stripping the ends of the cable special tool to remove insulation or using a lighter: gently heat the insulation for five seconds and sudden movement tear off the burnt area. But first of all, it is necessary to completely de-energize the apartment by turning off the input circuit breaker. It is best to completely cut off the power to the apartment.
If you have a multi-core cable installed, we press the ends of the wires using ferrules, but if you use a monolithic cable, no additional insulation is required. We distribute the wires into groups and fix them in the terminal block.
Remember, incorrect cable distribution can lead to a short circuit inside the luminaire!
You can determine which cable does what by using the color of the outer sheath. White and black wires are most often used in a chandelier. We fasten them by color and that’s it, don’t confuse them. At the end, you get a small twist of two groups, which are responsible for a certain part of the lamps through which the current will pass.
We screw the block to the base of the chandelier; if you do not tighten the screws on the terminal too much, this can lead to rapid overheating and oxidation.
Electrical part of the chandelier assembly
Inside the lampshade there is an electric cartridge, a lamp is screwed into it and two contacts come off, one is phase, the other is zero. A live wire can be made in several colors, and a neutral wire almost always has blue tint. The live cable is secured in the center of the electric cartridge, and the neutral cable is secured at the bottom using a factory latch. The lamp arms are attached to the main base of the lighting fixture, in which the wires are distributed as required by a separate switch; for example, you can take any two-key switch.
Technically proper connection chandeliers to the switch will allow you to adjust the lighting depending on the situation. For example, let’s take a three-arm lamp, one switch key will turn on one lamp, and the other the other two, or vice versa, everything will depend on technical feasibility and time of day.
Using the example of a connection diagram for a chandelier with a double switch, you can see what such a connection would look like: the first button turns on one lamp, and the second turns on all the others.
Chandelier connection diagram The neutral and phase conductors that come out of the base and side of the cartridge do not have their own voltage, but are designed to transport it. In every form lighting fixtures The zero is not connected through a switch, but is supplied directly. The main part of the wires with zero contact coming out of the sockets is concentrated in the center of the lamp and forms a kind of plexus. The wire strands that protrude from the base of the socket receive positive charge from central network and are divided into two groups.
Depending on the desired lighting functionality, full or partial, connecting the chandelier is best done in stages, as indicated in this article. The phase cable and the zero plexus must be connected alternately to each of the three wires inside the chandelier. The presence of a third, grounding cable is optional.
Connection in the distribution box
Let's look at the most common disconnection methods.
Twisting is the most popular and favorite method of separating wires in Russia. This method is very simple, you need to strip the ends of the wires and twist them together, after which it is advisable to wrap them with electrical tape.
Soldering – used for better contact of wires with each other. Typically used in places that require increased security: hospitals, schools. But it is worth remembering that, under increased loads, this connection method is prohibited.
Welding is the safest type of connection and requires special welding skills. Creates perfect contact between all connected wires.
Wire processing Crimping is carried out using a special sleeve. A time-tested method, the connection can last more than 20 years.
The use of special screw clamps is the youngest type of connection. Allows you to connect different combinations of wires into one common network. Very often used for quick installation.
Three cables go from the main distributor to the switch, the same number goes to the chandelier. The main power source is the central cable. The phase cable is connected to the conductor going to the switch. At that time, another cable going to the chandelier in the box is connected to the current drain wire. The cable from the lamp, which connects to the lamp, is secured inside the box using a plastic terminal.
Connection in a two-gang switch
This step can be carried out by absolutely anyone who has at least a little knowledge of electrics. The center of the wire connection is located in the switch; this is where the order of turning the lamps on/off is set. A switch with two keys has a mount for two or three contacts: phase, neutral, ground. The grounding contact can be found on switches with a metal body. Their main purpose is to connect wires into one common system.
Need to know. A phase wire is connected to the central mount in the switch, which is always under high voltage.
When working with wires you need to be especially careful and follow the rules fire safety, disconnect the apartment or house from electrical energy. For this reason, carry out connection work ceiling chandelier needed during daylight hours.
There is one significant advantage in connecting a chandelier to several switches: saving energy when there is no need for general world. It is better to place the switch near the door so that it is convenient to use it when leaving the room. With this little effort you'll save family budget and if you connect the chandelier to the wires correctly with your own hands.
The following article describes how to connect 3 carob chandelier to a switch with two keys, as well as how to assemble it correctly electrical part lighting device.
There are two ways to connect a 3-arm chandelier to the specified switch - using grounding and without using it. Regardless of which method is chosen, the main stages of work must be taken into account:
- connecting wires to the switch;
- connection to distribution box;
- connecting the current conductors coming from the distributor with the chandelier wires;
- correct connection of wires in the chandelier.
We will analyze step by step how to install a 3-arm chandelier without using grounding.
Electrical assembly
Two wires are connected to the socket into which the light bulb is screwed, one of them is 0, the other is phase. The phase wire has several colors, but the neutral wire can always be identified by blue color. The wire carrying a positive charge is connected in the center of the cartridge, and the zero one is connected to the side.
The lamp horns are attached to the concave base of the chandelier, which connects the wires as required by the corresponding switch - two-key, one-key or three-key.
Each switch key determines how many lamps will light up when you press it. If, for example, we take a five-arm chandelier, then the first switch key will light 3 lamps, and the second 2, or vice versa, depending on desire.
In the example with a 3-arm chandelier, everything will look like this: the 1st key of the switch will light one lamp, and the 2nd remaining ones, or otherwise, one lamp will light from the second key, and two from the first.
The neutral wires coming out of the side of the cartridge and the phase wires that come out of its middle do not themselves have either a zero or a phase, but they are designed for them. In any type of lamp, zero is not supplied through the switch, but goes directly. All neutral wires coming out of the lamp sockets go into the base of the lamp and form a kind of plexus in it. The wires that come out of the socket and have a positive charge are distributed in the chandelier frame into 2 groups. Depending on the desired function of the key, to turn on 1 or 2 lamps, the wires in these groups can be distributed differently.
In turn, each of the groups of wires carrying a positive charge and a zero plexus is connected in turn to each of the 3 wires of the central cable passing upward through the trunk of the lamp. The wires coming out of the barrel are connected to the wires coming from the distributor: phase groups to the wires of the distribution box carrying a positive charge, and zero to zero.
Connecting wires in a junction box
3 wires go from the distributor to the switch, and the same number of wires to the chandelier. The power supply to the junction box itself is provided by a two-wire wire.
The wire carrying a positive charge into the junction box is connected in it to the cord leading to the switch. And the wire that goes from the distributor to the lamp is connected in the box to the neutral wire that supplies power.
The wire from the chandelier, which carries the phase to one lamp, is connected inside the box to the wire coming out of the switch in one of the contacts (the contacts are located on both sides of the junction box). The wire transmitting the phase to the two chandelier lamps is connected in the second contact to the second wire from the switch.
Connecting wires in a switch with 2 keys
Inside any two-key switch there are 3 contacts located on the right, left and in the middle. They are intended for connecting wires. A phase wire is connected to the central contact, which is always energized.
Depending on the choice, the wire carrying the phase for 2 lamps in the chandelier is connected to the right or left contact, and the wire with the phase for one lamp is attached to the remaining contact.
Each switch key closes the central contact with the adjacent one and ignites required quantity lamps
How to properly connect a chandelier to a two-key switch
To connect a chandelier, a three-wire cable coming out of the lamp barrel should be connected to the same wire coming from the distributor. The phase wires coming out of the distribution box are connected to similar wires on the lamp, and the neutral wires are connected to the zero wires.
To correctly identify neutral and phase wires, you can use a voltage indicator.
When connecting a chandelier using grounding, all wire connections in the lamp and switch are carried out according to the diagram described above. The only difference is that the junction box includes a 3rd protective wire of pale green color. It comes out of the distributor and is connected to metal frame chandeliers.
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A chandelier is one of the main lighting devices that all Russians install today. It can be connected to one or several switches. How is a chandelier connected to a double switch, what is used for this and what safety precautions are followed? More on this later.
To connect the lamp to double type switch, you must strictly follow the rules and observe safety precautions. It is not necessary to study the documentation, which is intended for professional electricians. You just need to know that all tools for performing electrical work must be well insulated. Work should only be carried out on a de-energized network.
Tools for work
To perform the work, you need to take a straight and Phillips screwdriver, a side cutter, pliers, sharp knife, a digital or dial gauge, an indicator screwdriver and insulating tape.
Pay attention! A knife is needed to insulate a single-core cable element, a side cutter or pliers. An indicator screwdriver is needed to detect the phase.
Conductor marking
To make dialing easier and eliminate errors, you need to use colored insulating cable marking. The generally accepted standard is to mark the conductor element with a green stripe. In no form should you use a source that is green in color to connect devices. This source is used to ground the contact.
A zero or neutral source has blue or light blue conductors. Charged conductor elements have different colors. Problems occur when working with wiring that operates on a network long time. Sometimes the conductor insulation was the same in the conductors; for this reason, it is necessary to carry out testing before starting work.
Conductor marking scheme
Ringing wires
The first step is to check the correct connection. A screwdriver with an indicator shows the charge on some source when the switch is not working. If it is not possible to search for a charge, this means that the switch is not connected correctly or there is a problem in part of the distribution board.
Connection diagram for a two-key type switch
Several elements can come from the ceiling covering, one of which is phase, and the other is zero. All lamps can be connected using this electrical diagram. If three cables come from it, then the first and next are phase, and the third is zero. Using this diagram, you can distribute the connection of lamps in a chandelier. There is a moment when three elements emerge from the ceiling covering, but there is no way to distribute the switching on of the chandelier. The third has a yellow-green color and is considered zero.
Connection diagram to a three-key switch
To connect a source to a switch that has two keys, you need to understand where of the two or three wires of a chandelier or five-arm switch is the uncharged conductor and where is the charged conductor. To determine common wire nickname, you don’t need a lot of knowledge, it has a different color from others. This means that the other two have several lighting sections. Then the zero is connected to a common conductor, and each section, which has different conductor phases, goes through a two-key type of switch.
Connection diagram for five-arm type
Safety precautions
When making the connection, it is worth familiarizing yourself with simple safety precautions on how to connect a chandelier with 5 lamps. According to it, you should not touch exposed cables that are located on the ceiling. When connecting the chandelier to the wiring, you must turn off the input circuit breakers of the smoke shield. Next, careful insulation of exposed wires and careful study of the device instructions are required.
Important! It’s also worth figuring out how to safely connect a chandelier to 2 switches. It is necessary to exclude children from access to the place of work. In the event of an electric shock, you must immediately turn off the network. It is advisable to work with a partner.
Carrying out work with rubber gloves as a guarantee of safety when connecting lighting equipment
As a result, to connect a chandelier to a double switch, you should prepare necessary tools, look at the markings of the wires and find the ones you need using a voltmeter and ringer. At the same time, it is important to follow safety precautions and carefully study such an element as electrical diagram connecting a chandelier to two switches or several switches.
A seemingly simple operation - installing a new chandelier - can confuse a person unfamiliar with electrics: there are a lot of wires and it is not clear what to connect to what. How to connect a chandelier with different quantities horns (and wires) to the switch and we will discuss.
Preparation: continuity testing and phase determination on the ceiling
Those who have at least a little knowledge of electrical networks will not need this, others will find it useful. It can be difficult for a person who does not constantly deal with electricity to navigate. To avoid confusion, we will tell you everything in order: how to find phase (or phases) and zero in the wires on the ceiling, what to do with grounding. And then, like a whole bunch of wires on a chandelier, connect them to those that stick out above. As a result, connecting the chandelier with your own hands will be a simple task for you.
Ground wire
If the wiring is already done, there will be two, three or four wires sticking out from the ceiling. One of them is definitely “zero”, the rest are phase, and there may also be grounding.
There is not always a grounding wire, only in newly built houses or after overhaul with replacement of electrical wiring. According to the standard, it has a yellow-green color and is connected to the same wire on the chandelier. If your chandelier does not have one, carefully insulate the exposed wire and leave it as is. You cannot leave it uninsulated - you may accidentally short-circuit it.
Looking for phases and zero
You need to figure out the rest of the wires: where is the “phase” and where is the “zero”. In houses old building All wires are usually the same color. Most often - black. New buildings may have black and blue, or brown and blue. Sometimes red is present. In order not to guess by colors, it is easier to ring them.
If you have three wires on the ceiling, and on the wall two-gang switch, you should have two “phases” - for each of the keys and one “zero” - the common wire. You can ring with a multimeter (tester) or an indicator screwdriver (this is a special screwdriver with a light that lights up when voltage is present). During operation, move the switch key to the “on” position (the input circuit breaker is also turned on). After dialing, turn the switch keys to the “off” position. If possible, it is better to turn off the circuit breaker on the panel and connect the chandelier with the power turned off.
Checking the wires on the ceiling with a tamper
How to ring and identify wires with a tester is shown in the photo. Set the switch to the “volts” position, select the scale (more than 220 V). Alternately touch the pairs of wires with the probes (hold the probes by the handles, do not touch the exposed conductors). The two phases do not “ring” with each other - there will be no changes on the indicator. If you find such a pair, most likely there are two phases. The third wire is most likely “zero”. Now connect each of the supposed phases with probes to zero. The indicator should show 220 V. You found zero - in the international specification it is designated by the letter N - and two phases - designated L. If all the wires are the same color, mark them somehow: with paint, a colored marker, a piece of adhesive tape. Phases are in one color, zero is in another.
It is easier to work with an indicator screwdriver: just touch its end to the exposed conductor. Lit - phase, no - zero. Very simple.
If there are only two wires sticking out, then one of them is phase, the other is zero. In this case, there is only one key on the switch. There are no other options.
Wires on the chandelier
Connecting a chandelier with 2 wires is simple: screw one of them to phase, the other to zero. Which one goes where - it doesn’t matter. If there are two phases on the ceiling, and the switch on the wall is two-key, there are options:
On multi-arm chandeliers there are definitely more than two wires. We have decided on the purpose of yellow-green. This is grounding. If the same wire is on the ceiling, connect it to it. The rest also need to be dealt with.
A chandelier with 3 wires is not much more difficult to connect. If one of them is grounding (yellow-green), it can be:
- ignore - if there is no wire of that color (or similar) on the ceiling,
- connect to one of the same color.
Actually, there are no other options. Three wires are mainly used for lamps with one bulb. With two, this is an outdated design, with three, a more modern design that complies with current recommendations.
Connection to double switch
They connect a five-, four-, three-arm chandelier to a two-key switch according to the same principle. From each of the horns there are two different colored wires. Most often these are blue and brown wires, but there are other variations. To connect to a double switch, they all need to be divided into three groups: two phases and one zero.
First everything blue wires combine with each other and twist well. This is zero. In principle, you can take wires of a different color - it doesn’t matter for lighting fixtures. But according to the standard, “zero” is indicated in blue. It is only important that conductors painted in a different color do not get into the twist. In the photo below you see that all conductors blue combined into one group. This is “zero”.
Now divide the remaining ones into two groups. The breakdown is arbitrary. One group of light bulbs will turn on from one key, the second - from another. A five-arm chandelier usually combines 2+3, but 1+4 is also possible. The four-arm version also has two options - 2+2 or 1+3. But with three light bulbs there are no options: 1+2. Twist the separated wires together. We received two groups, which we connected to the “phases” on the ceiling.
How to connect a chandelier to a single switch
If there are only two wires on the ceiling, but there are many on the chandelier, but only in two colors, everything is simple. Twist all the conductors of the same color with their bare parts and connect them to one of the wires on the ceiling (it doesn’t matter which). Collect all the conductors of the second color into one bundle and connect them to the second ceiling one. The chandelier connection diagram in this case is shown in the figure below.
When turned on in this way, all the lights will light up at the same time.
Rules for connecting wires
There are no small details when working with electricity. Therefore, we connect the wires in the chandelier according to all the rules. When combined into one group, it is not enough to simply twist them and screw on the protective cap.
You need to connect the wires from the chandelier and the switch in the terminal box
Such twist will sooner or later oxidize and begin to heat up. It is highly advisable to solder such connections. If you know how to handle a soldering iron and tin, definitely do this. This will guarantee normal contact and the connection will not heat up.
Now let's talk about how to connect the wires from the chandelier with the wires from the switch (which are on the ceiling). By latest rules twists are not allowed. Terminal boxes must be used. Majority modern chandeliers equipped with them. If not, buy it at any hardware store or selling lighting fixtures.
When using such a terminal box, a problem arises: twisting from large number The wires simply won't fit into the hole. Output: solder a conductor to the connection (copper, single-core or stranded, with a cross-section of at least 0.5 mm2). This connection is well insulated, and the free end of the soldered conductor is inserted into the terminal box (a long one is not needed - 10 cm is more than enough).
Having inserted all the wires from the chandelier into the terminal block and tightened the screws, the entire structure is raised to the ceiling. There it is pre-fixed, after which it is placed in the terminal block in in the right order connect the wires. In this case, it is important to set “zeros” one opposite the other. Phases are connected to phases in random order.
How the wires on the chandelier are separated, how the conductor and the chandelier are connected to the terminal block - all this is in the video.
Connecting a Chinese chandelier
Most of the relatively inexpensive chandeliers on the market come from China. What's good about them is their large assortment, but there are problems with the quality of the electrical assembly. Therefore, before connecting the chandelier, you need to check its electrical characteristics.
First, check the integrity of the insulation. They can be assembled into one bundle and short-circuited to the housing. The tester should not show anything. If there are any indications, you have two options: look for and replace the damaged wire or take it for an exchange.
The second stage of testing is checking each horn. There are two wires coming from the horn. They are soldered in a cartridge to two contacts. Connect each wire to the corresponding contact. The device must show a short circuit ( short circuit or infinity sign depending on the model).
After checking, start grouping the wires as described above.
Connecting a halogen chandelier (with and without remote control)
Halogen lamps operate not from 220 V, but from 12 V or 24 V. Therefore, step-down transformers are installed in each of them and the entire circuit is assembled and ready for installation. Only two conductors remain free, which need to be connected to the wires sticking out on the ceiling. It is connected in any order, “phase” and “zero” do not matter.
If the chandelier is equipped with a remote control, a control unit is added to the transformers. The connection is similar: there are two conductors that need to be connected to the one on the ceiling. The third conductor coming from the other side (it is thin) is an antenna, with the help of which the remote control and the control unit “communicate”. This conductor remains inside the glass in the form in which it is.
How to connect a chandelier with a remote control, see the following video.
Almost every apartment has a chandelier. This is a multi-lamp lamp, which is most often suspended in the middle of the ceiling. This arrangement ensures the most uniform lighting throughout the entire area of the room.
At the location chosen for installation, a hook is attached to the ceiling. Some apartments do not have such a hook. This, perhaps, can cause some difficulties, because not everyone has a power tool at home. In this case, you will have to seek help from a specialist.
If there is a hook, the lamp is hung on it using a ring or bracket located in the upper part of the lamp structure.
Now you need to connect the chandelier to electrical network apartments. Wires usually come out from the center of the ceiling; there may be two or three of them. Two or three wires are also routed through the vertical tube on which the suspension is attached.
The presence of two wires in this tube means that the design allows all lamps to be turned on only at the same time. Three wires allow you to run in sections to change the level of light in the room.
Two wires coming out of the ceiling deprive us of this opportunity. Let's consider all connection cases electrical wires to the chandelier.
Connection diagram for a chandelier via a single-key switch
If there are two wires on the ceiling and the connected lamp, the connection process is the simplest. The wires are connected in pairs; the sequence in this case does not matter.
The figure below shows chandelier connection diagram via a one-key switch. Let's look at the diagram in more detail. As can be seen from the figure, the lamp consists of one lamp; in this case, the connection is made in this way: the supply neutral wire (blue) in the distribution box is connected immediately to the neutral wire of the chandelier.
The phase wire (brown) is first connected from the power source in the distribution box to the switch, then from the switch to the phase wire of the chandelier.
The connection is best made using screw terminals. As a last resort, you can carefully twist the wires with pliers and insulate them with special caps.
Application PVC tapes undesirable, as it dries out over time and the quality of the insulation decreases. In some luminaire designs, the lamps are not pre-combined, and pairs of wires from each lamp come out of the vertical tube separately.
If the lamp consists not of one lamp, but of several (for example, three), the connection in this case is also not particularly difficult: all the neutral wires in the chandelier are connected to each other and connected to the neutral wire of the network.
All phase wires are also interconnected and connected to the phase wire that came from the switch.
When connecting, you need to twist wires of the same color together. The resulting twists are connected to wires running through the ceiling to single-key switch, in the manner described above.
Connecting a chandelier via a two-key switch
Modern electrical wiring in the apartment is carried out with a three-core cable with wires different colors. Three wires from the two-button switch also fit into the place where the lamp is supposed to be mounted. How to connect a chandelier in that case?
This is where difficulties arise in determining the purpose of the wires. One of the three is the neutral conductor, common to all lamps. The other two are phase ones, passing through various switch keys.
Unfortunately, electricians do not adhere to a single color scheme connections of wires, and the colors of wires in cables various companies may also be different. Before connecting the lamp, you need to determine the purpose of the wires. The easiest way to do this is to use the voltage indicator while pressing the switch keys. The conductor on which the indicator does not detect a phase will be zero.
In the absence of such an indicator, you will have to turn off the power to the entire apartment and disassemble the switch. By removing the cover from the switch, you can see what color wires go from the keys to the chandelier. The neutral conductor does not pass through the keys, and the incoming phase wire is divided into two groups by the keys.
The connection of the wires on the chandelier is similar to the connection to a single-key switch. The difference is that the wires coming from the lamps are pre-divided into two sections. One twist from each group of lamps is connected together to the neutral wire. The other two twists are connected separately to the two remaining wires.
Such way to connect a chandelier allows you to step by step adjust the lighting in the room.
Connection of chandelier wires when connected via a two-key switch, top view.
