Replacement of electrical wiring in an apartment is most often carried out during overhaul. The need to replace the old line is due to the fact that it is not designed for modern electrical appliances. During construction panel houses of the old model (Khrushchev and Stalin), each apartment was allocated a network capable of withstanding a load of 3 kW, which is obviously not enough for modern household needs. Next, we will consider in detail all the stages of work on replacing the wiring, as well as visual video instructions that describe the entire process in detail.

Stage 1 – Deciding on the scope of work

The first thing you need to start with is to know management company or an energy sales organization, is it possible, since replacing the wiring without increasing the allocated power will not solve the problem of the knockout machine when turning on the washing machine and electric kettle. Even if you were refused to increase the allocated power, still calculate the wiring for the required load and lay out a three-wire circuit in case of reconstruction of your house and replacement of the riser with the organization.

Next, you must determine whether to change the line completely or just certain areas. Here, of course, it’s up to you, but we can say with confidence that the buildings of the 60s used a small cross-section aluminum conductor, most likely without grounding, to create an electrical network. This option is extremely dangerous and cannot even be partially restored, so it is better to completely replace the wiring in the apartment with your own hands once and be calm.

If the conductors are in this condition, the apartment electrical wiring must be changed:

You must also evaluate your strengths and decide whether you will replace the wiring in the apartment yourself or whether you will need to call a specialist. This is a double-edged sword. On the one hand, there are no particular difficulties in laying out the line, but on the other hand, you will need a special tool, calculations and certain skills in working with electricity. If you still want to test your strength, then we will consider in detail all stages of work in the form of step-by-step instructions.

A clear example of electro installation work

Stage 2 – Decide on the design and materials

Now we move directly to the calculation work. To begin with, you need your own, which will indicate the installation locations of new switches, sockets, junction boxes and powerful household appliances, which will be powered directly (for example, an electric stove).

Before starting the replacement, we recommend that you review the information provided. simplest option output of lighting groups and sockets in all rooms. Next, based on the diagram, you need to calculate the number of materials, while simultaneously selecting the most suitable characteristics.

It should immediately be noted that it is used in an apartment, which is associated with many nuances: electrical safety, impact on the interior of rooms, fire safety, etc. At the same time, no one forbids replacing the electrical wiring in the apartment with your own hands, it all depends on your preferences and strengths.

1. The cable is copper, three-core, with a cross-section of at least 2.5 mm 2 for the socket group, 1.5 mm 2 for lamps and 4 mm 2 for powerful electrical appliances. We recommend doing this to accurately determine the appropriate diameter of the cores. As for the brand, it is better to give preference to an expensive foreign product labeled . Of the domestic ones, which are cheaper, we recommend using or better VVGng-LS.
2. Protective automation. You can't do without it, because... When replacing electrical wiring in an apartment, it is imperative to protect the wiring from, and. For this, an RCD and a circuit breaker (or a combined device - a difavtomat) are used. The automatic machine and the RCD have various characteristics, which are selected based on the line loads. For example, for a three-room apartment, it is customary to install 16A circuit breakers on sockets, 10A for lighting, and 32A for a powerful electric stove. The rating of the input circuit breaker on the distribution panel is indicated in the electricity supply contract, because limited by allocated power. The residual current device is installed at a nominal value higher than the machine. Among manufacturers, we recommend giving preference to leading companies - ABB, Schneider Electric and Legrand.
3. Distribution boxes for an apartment are selected based on the branching of the groups and the cross-section of all conductors. Rectangular and square boxes are more spacious, but round ones are much easier to install.
4. Sockets must be grounded; to protect against children, purchase products with special curtains that will prevent foreign objects from getting inside. Pay attention to the product labeling so that the socket can withstand current loads, otherwise problems cannot be avoided in the future when connecting powerful household appliances.
5. It is forbidden to use twists, the list of permitted connections is given in PUE 2.1.21 (), we listed them in the next paragraph.
6. Wire and cable cores can be connected using screw and spring clamps and terminal blocks, welding, soldering, bolts, and crimping. Currently, one of the most convenient and popular types of connections are vago terminal blocks; they are perfect for most cases and are easy to use. Sleeve crimping is a good type of connection, but a special tool is required. Nevertheless, the most reliable connection is welding and soldering, but also the most labor-intensive. You can find out more about this issue in the article
7. There are no special requirements for switches, the main thing is that they are convenient and safe. Among all, keyboards and dimmers are popular.

By counting the amount of all materials for electrical installation and choosing the most suitable models products, with the list, go to the store to shop, and then proceed to replacing the wiring in the apartment.

Stage 3 – Dismantling the old line

Now you can replace old electrical wiring. To do this, be sure to turn off the electricity at the entrance to the apartment, remove all interfering furniture and begin to destroy the wall decoration.

Replacement of electrical wiring in the apartment is carried out from distribution boxes in each of the rooms. These electrical “points” can be detected by plastic covers in the wall or prominent contours through the wallpaper. The cover is twisted, after which all the twists are separated, and the old cable is carefully released from the putty grooves. You can also find a wire in the wall using, which is created from improvised means in a matter of minutes.

Please note that in some places the line cannot be removed from the wall without significant damage to the structure. In this case, you can do without gating if you cut off the problem area and carefully insulate it, leaving it in the old groove!

Stage 4 – Laying new wiring

Now the most important thing is that you need to independently replace the electrical wiring in the apartment with a new, more reliable one.

We will not dwell in detail at this stage, because... We looked at it in detail in the corresponding article.

When the replacement of apartment wiring is completed, it is imperative to photograph the cable distribution along the walls. This is done so that if problems arise, you can easily find the damaged area using a photo.

Do not rush to cover the grooves with the solution; this should be done after all the wiring has been checked for functionality.

The video below clearly demonstrates an example of new wiring in an apartment after replacement:

Ready wiring

Stage 5 – Control check

And last but not least, testing the new wiring in the apartment with a multimeter. This device will allow you to determine the functionality of the electrical wiring and the presence short circuit, if suddenly you connected something wrong. If the device shows no errors, then you can connect the finished line to the input panel and check the functionality of all lamps, switches and sockets. We talked about how this is done in a separate article.

If all elements of the circuit work, turn off the power again and go to. At this point, replacing the electrical wiring in the apartment with your own hands is considered complete. As you can see, the event is quite labor-intensive and requires skills, but still, with great desire and care, you can carry out electrical installation yourself. We hope ours step-by-step instruction was useful and understandable for you!

Pros and cons of replacing wiring

Material

Almost every owner needs to replace the electrical wiring in an apartment. Especially if the apartment is located in a house built more than 20-30 years ago. At that time, most of the household appliances and electronics now in use did not exist, so the wiring was not originally designed for such a load and was made primarily of aluminum.

Over time, the characteristics of such wiring deteriorate significantly. If you apply excessive load to such wiring, it simply will not withstand it and will burn out.

Experts strongly recommend entrusting any electrical work to professionals. However, if desired, everything necessary measures you can do it yourself. You just need to familiarize yourself with general information about the upcoming work, remember the safety regulations and carry out installation in accordance with the instructions.

Remember: it makes no sense to partially replace the wiring. If you decide to take such measures, then change everything completely: the panel, switches, electrical sockets, etc.

Find out the wiring diagram first old wiring. In some situations, the circuit is organized in such a way that it is impossible to replace existing components with new ones, and the only available solution is to dismantle the highways and arrange the wiring in a new way.

For example, there are situations in which the wiring is made in grooves located under the floor covering. If the owner's plans do not include complete replacement coverings, the only one possible variant in such a situation, disconnect the old wires and lay new lines using a different method.

If the cables were initially laid in grooves, there will be no special problems with replacement, but the wall covering will be significantly damaged.

The easiest way is to replace electrical wiring laid along open circuit. With this scheme, the cables are laid in special channels (ducts). If the boxes were not initially disguised with finishing, for example, plasterboard, then renovation work will pass with minimal losses.

Before you begin, you will need to draw up a new wiring diagram. Select the wiring method. It is strongly recommended to refuse the open method - it simply does not look aesthetically pleasing in an apartment. Give preference either closed installation, or arrangement of wiring in cable channels.

Sketch out a housing plan on paper indicating the locations of switches, sockets and other components.

It is more convenient if the sockets are placed in places where powerful household appliances are installed. Calculate the optimal number of sockets. It is more convenient when there is one outlet for every 5-6 m2 of space. A kitchen of 6 m2 must have at least three sockets.

If an electric stove is installed in an apartment, a separate outlet must be installed for it. Wherein power cable such a socket must have a cross-section of at least 4 mm 2, or even 6 mm 2. The specific value is selected individually in accordance with the power of the equipment.

There are no strict requirements regarding the height of sockets. The main thing is that they are convenient to use.

It is most convenient to install switches immediately after entering the room. The optimal distance between the switch and the door is at least 150 mm. Place the switch on the side of the vestibule. It will not be very convenient to use near the hinges. There are also no strict recommendations regarding the installation height of switches - do what is convenient for you.

Pre-determine the total power electrical appliances for each individual room. If within one room it will be installed a large number of powerful devices, separate lines with individual circuit breakers are connected to such a room.

In accordance with the selected locations for installing switches and sockets, select convenient areas for installing distribution boxes. Indicate their locations in the plan.

Indicate in the plan the type, material of manufacture and cross-section of cables for each room.

Check the wiring diagram again. Think about whether everything suits you, whether it will be convenient for you to use sockets and switches mounted according to this scheme in the future. If you are satisfied with the result, complete the basic preparatory steps.

First of all, mark the locations of switches and electrical outlets on the walls. If the wiring will be carried out using a hidden method, get rid of all finishing materials, and then draw on the walls the lines for the wires and the installation locations of the elements of the new system.

If you wish, you can get rid of the old wiring. First, get rid of switches and sockets, then distribution boxes and cables. But this is quite dusty and lengthy work. It is much easier to simply disconnect the old wires, dismantle switches and sockets, seal their installation sites and lay new cables in accordance with the diagram.

Safety precautions

All work on dismantling and installing electrical cables must be carried out in strict accordance with safety precautions. Before performing any manipulations, turn off the main circuit breaker, i.e., turn off the power to the apartment.

Using the indicator, make sure there is no voltage in chandeliers, electrical outlets, and switches. Do all this while wearing rubber gloves. The handles of the working tool must be insulated.

Replacement of wiring should begin with the installation of a new distribution panel. New houses usually have niches for such panels with pre-laid power cables. In such a situation, all that remains is to place residual current devices and circuit breakers in the panel, fix the device in the niche intended for this and connect the power cable to it.

In houses old building shields are made hinged. Select a location to install the shield with easy access. Secure the shield to the wall using dowels.

Drill a suitable hole in the wall for connecting the power cable. Stretch the wire and connect it to the panel on the driveway.

Strip the input wire and make the following connection:

• blue cable - to zero;
• white wire - to the top contact;
• cable yellow color– to the “ground”.

In case of using emergency shutdown devices, first connect the zero and phase wires to such a device and only then connect them to the machine and to the zero terminal.

Proceed with wiring. We offer you two methods. Familiarize yourself with the procedure for completing each of them and get to work.

Hidden installation of new wiring

The laying of hidden electrical wiring is carried out in grooves, under finishing floors, in ceiling voids, under a layer of plaster or behind plasterboard finishing.

Arrangement of wiring under plaster layer and in grooves - the most “dirty” and labor-intensive option. Some owners lay cables along the floor. This allows you not to go around the existing walls, but requires complete dismantling of the covering and laying new material in its place.

First step

Make grooves. To arrange them, use a wall chaser or at least a grinder and a hammer drill. Remember safety - be sure to wear safety glasses and a respirator.

When choosing the depth of the grooves, remember: the thickness of the plaster layer laid on top of them should be no more than 1 cm. There are no restrictions on the width.

If it is possible to lay wires in floor voids, give preference to this method.

Second step

Third step

To do this, cut the cables into pieces of the required length. In some situations, corrugation can be used for greater convenience. With its help, it will be easier in the future to replace a section of cable without compromising its integrity. finishing material walls

A method is also sometimes used, according to which a bundle of cables is pulled together using special clamps and attached to the wall using suitable fasteners.

Fourth step

Connect the cables in the junction boxes. To do this, use SIZ. Cover the connected cables with a cover.

Fifth step

Install switches and electrical sockets in selected locations. Connect the cables to the contacts. Make sure the installed system is working properly using a special tester.

Finally, all you have to do is turn on the electricity supply from the power panel and seal the grooves with plaster.

If you choose the method of installing wiring under plasterboard finishing, the technology for performing the work will be slightly different. In such a situation, the wires must be hidden in corrugations, and the corrugations are attached to the walls using clips.

This technique is much simpler and less dusty compared to the previous method, but its aesthetics leave much to be desired. Connecting the shield is carried out in a similar sequence.

First step

Attach the plinth to the floor surface in accordance with the previously drawn up diagram.

Second step

Run distribution boxes from the baseboard to switches and electrical outlets.

Third step

Place the cables in the box.

Fourth step

Install external junction boxes if installation is required. To connect the wires inside such boxes, use SIZ.

Fifth step

Install sockets and switches, bring wires inside, connect.

Finally, all that remains is to check the voltage using a tester and close the box with the baseboards.

It is also advisable to invite a qualified electrician to check that the measures are carried out correctly.

Happy work!

Video - Do-it-yourself electrical wiring in an apartment

If you decide to make repairs at your place permanent residence, then replacing the old wiring in the apartment should become a must for you. After all, houses that were built back in Soviet times, were not designed for modern loads.
Therefore, if, after completing the repair, you did not pay enough attention to the electrical wiring, it can become a serious headache in the future.

Selecting a wiring option

The chosen version of the electrical wiring diagram for the apartment largely depends on the method of its installation you have chosen. At the moment, there are two main types - open and hidden. Hidden way laying electrical wiring involves laying wires inside the walls and then plastering them.
The advantages of this method include:

• Saving free space in the apartment
• Complete concealment of all live parts that do not damage appearance your room
• No need for additional protection of wires from mechanical damage
• Higher load and overload tolerances for any hidden wires

The disadvantages of the hidden wiring method include the following parameters:

• The complexity and labor intensity of wire laying work
• Difficulty in identifying faults and repairing hidden wiring

The second way to replace electrical wiring is the open method. Conventionally, it can be divided into laying wiring in baseboards and laying in cable channels.
Of course, there are still other methods of laying open wiring, but they are used very rarely in apartments due to their ugliness.
The advantages of replacing electrical wiring with your own hands using an open method include:

• Relative ease of installation
• Ease of identifying damaged wiring and repairing it
• Ease of installing additional wiring for new power sources, as well as making changes to the apartment’s power supply circuit

But there are also disadvantages open method There is quite a lot of wiring:

• Stealing the free space of our already small apartments. When installing furniture, additional boxes can get in the way
• If the method of laying wiring in baseboards is used, then the number of possible wires is very limited. This introduces significant restrictions into the options for choosing a power supply scheme
• When laying wires in an open way, they require additional protection from mechanical damage and their isolation from each other and from flammable surfaces in order to fire safety. Because of this, the price of such electrical wiring is slightly higher.
• For open wiring, the maximum parameters are slightly lower permissible load and overloads due to their poorer cooling.

Choosing an apartment power supply scheme

At the next stage, replacing the wiring in the apartment involves choosing a power supply scheme.
At the moment there are two main options:

• The first, which was probably used in your Soviet-built house, is the laying of one main wire from which all the wires of the apartment’s electrical receivers depart. This method does not provide adequate protection electrical network your apartment. After all, if even one area is damaged, your entire apartment will lose power.
• It should also be noted that according to paragraph 6.2.2 of the “Electrical Installation Rules” (PUE), group indoor lighting networks must be equipped with a circuit breaker of no more than 25 A. This imposes certain restrictions on total power electrical appliances in the apartment.
  Therefore, it is recommended to use such a wiring diagram only for one-room apartments or when open method laying wires in baseboards. After all, laying a large number of wires in the baseboards for power supply according to a different circuit will be extremely problematic.
• The so-called “European” power supply scheme is now more common. It implies the presence of a switchboard and the presence circuit breakers for each individual consumer.
  This could be one room or one type of consumer in a room. It all depends on the expected load, your wishes for the safety of the power grid and your financial capabilities.

Sometimes you can find the use mixed schemes electrical wiring. This is a fairly rare case, but it also has a right to exist. It all depends on the nature and type of load.

Electrical wiring calculation

How to replace electrical wiring in an apartment panel house or any other place is impossible without an accurate calculation, then at the next stage we proceed to the calculations.

Attention: First of all, we need to determine the possible loads on each section of the electrical network protected by a circuit breaker. Based on these loads, not only the wire is selected, but also the circuit breaker itself.

So:

• To determine the load we use the formula; where P is the rated power of the electrical appliance, and U is the rated voltage of the electrical network. Based on this formula, for a 220V network it can be assumed that 1 kW of electrical appliance power is 5 A of load for the wire.
  In this case, it can be simplified to assume that a copper wire with a cross-section of 1 cm2 passes a current of 10A, and an aluminum wire with the same cross-section passes 5A. This is, of course, a very simplified calculation, but in most cases it is sufficient.

Let's pay attention! To accurately calculate the required wire cross-section, you should use paragraph 1.3 of the PUE. Here you will find correction factors depending on installation conditions, installation methods, number and cross-section of wires laid nearby, correction temperature and overload coefficients, as well as design parameters for wires with different insulation structures.

• We will immediately warn you against the most common mistakes. First of all, please note that the cross-section of the wire of one of the connections cannot be greater than the cross-section of the input wire. Circuit breakers must comply with the maximum permissible connection current.

Note! When calculating, you should not take into account the operation of all electrical appliances at once, otherwise this will lead to a significant increase in the cost of your electrical network. Remember, any electrical wires allow short-term overload of up to 10 - 15% for 1 hour per day.

Replacement of electrical wiring in an apartment is carried out only in compliance with the PUE standards and basic rules. It is quite difficult to list all of them, so below we will present only the most common mistakes not professionals, which can lead to problems during operation.
So:

• It is prohibited to install automatic switches and fuses in neutral working and grounding conductors.
• The wiring of the 220V network must be carried out with a three-phase wire, where 1 wire is phase, 1 wire is neutral and 1 wire is ground.
• According to clause 7.1.37 of the PUE, the installation of sockets in bathrooms and shower rooms, as well as bathhouses, is not allowed. And, according to paragraph 7.1.39, it is prohibited to install switches in these rooms.
• The wires must be connected by soldering, crimping, welding or bolting.
• At the places where the wires are connected, it is necessary to provide a margin to ensure reconnection.
• Metal elements of electrical wiring (ducts, trays, corrugated hoses) must be grounded.

In addition, replacing electrical wiring in an apartment requires compliance with basic rules:

• Wiring should be done strictly vertically or horizontally. Otherwise, the likelihood of subsequent damage to the wire increases sharply.
• Switches and sockets should be located at the same height.
• Crossing wires should be avoided.
• Avoid placing sockets and wiring too close to heating equipment and water supply systems.

conclusions

Our simple instructions for carrying out work on replacing electrical wiring will allow you to complete the work in full accordance with requirements of the PUE. At the same time, having produced right choice diagram and method of laying the wire, you will certainly be able to cope with all the work in the shortest possible time and at minimal cost.

As a rule, every 3-5 years we renovate the rooms in our apartment. In the vast majority of cases, repairs are cosmetic in nature and include: replacement of ceiling, wall and flooring, as well as replacement of: baseboards, cornices, lighting and sockets. If you decide to renovate the entire apartment or are moving to a new one, we recommend replacing the wiring. We will try to describe in detail how to properly install the wiring in this article.
The content of the article:

Why do you need to change the wiring?

Some are interested in the question of why it is necessary to change the wiring if the old one works quite well. In order to answer this question, it is enough to give a similar example with water pipes. Metal pipes are often replaced with plastic ones, as they are much more reliable and durable, and besides, they do not get clogged with the scalding that occurs in metal pipes, and therefore the throughput plastic pipes and the pressure in them will always be good. The same thing, by and large, applies to electrical wiring.
Firstly, the wiring itself in houses that were built in the last century is not designed for the way we use it now. When designing houses and apartments, electrical engineers did not know that in every apartment in a few years, in addition to a refrigerator, TV, washing machine and light bulbs, there will also be: a computer, air conditioning, a powerful electric kettle, an iron and other electrical equipment. It turns out that the throughput of the old wiring is lower than the power consumption of all our electrical appliances.
Secondly, in addition to the inadequacy of the wiring capacity, in most houses of the old construction it was aluminum, and aluminum is not the best best material for this, having a large number of shortcomings. In addition, the service life aluminum wiring- 30 years, but it is worth replacing it even without waiting for this period in order to ensure a stable voltage supply in the apartment and extend the service life of electrical appliances.

Selection of wiring and installation plan for sockets and switches

Before moving on to the description of practical steps for installing wiring, a few words need to be mentioned about the wiring itself.

Which new wiring is better to lay?

Of course, the best cable for electrical wiring in an apartment is a multi-core copper cable. The main advantage of copper cable over aluminum is its strength. Probably, each of you has encountered such a problem when the aluminum core of the cable, when connecting a switch or socket, simply broke off, and this is a very unpleasant situation, with copper multi-core cable such a problem is not terrible. In addition, copper cable has the best throughput capacities and longer service life.
To connect sockets, it is recommended to use a 2.5 square stranded copper cable, and for lighting - 1.5 square. We advise you to give preference to a double-insulated cable. If you have grounding in your house or you plan to do it yourself in the future, then buy a triple cable with a special conductor for grounding.

Installation plan for sockets and switches

First of all, before carrying out installation work, you need to think over the plan and interior of the rooms after the renovation, since on its basis the apartment wiring will be laid out in order to know where and what cable to lay, and most importantly - how. Therefore, having such a plan, you will know in which places to place switches and sockets.
For example, knowing the place where the computer will be installed, we will lay a separate cable there to power all computer devices that have a high total power consumption. The same applies to other powerful equipment. In those places where energy-intensive equipment will be located, it is better to lay a separate cable with a single socket: electric oven, air conditioner, water heating tank, refrigerator, washing machine, etc. For the rest of the equipment we provide a “common” cable and sockets.
Hall
In the hall we recommend installing 5 sockets with one frame for connecting home theater(TV, DVD player, digital receiver and audio system), a double socket near the sofa, and a single socket in those places where you need them.
Bedrooms
As for the bedroom, near the bed, desk and the TV is better to have a double socket. In other places - as needed.
Corridor
In the corridor it is enough to install one double socket, and if necessary, additional ones.
Bathroom
In the bathroom, the availability of sockets depends on what electrical appliances you will use in it. If there is no washing machine there, and your family members do not use electrical appliances, then there is no point in making an outlet in the bathroom.
Kitchen
If you have technical functional kitchen, then in the place where the cutting table will be located, we recommend making from three to five sockets in one frame, depending on the number of devices used simultaneously. Typically 5 sockets best option to connect: a hood, a microwave oven and an electric kettle, leaving two sockets free for connection: food processor, bread machines, coffee makers and more. Try to think over the number of sockets in such a way that stationary equipment, which will not be folded into a box after use, has its own socket for connection, so as not to pull the plug of one equipment out of the socket every time to connect another. Then we calculate the required number of sockets, as well as what power and how many devices will operate at the same time, so that we know whether to run one cable or several.
We also make sockets in other places where it is necessary.

Installation of sockets

According to established standards, installation of sockets is carried out at a distance of 30 cm from the floor, and installation of switches - at 85 cm. Up to five sockets can be connected to one cable with a cross-section of 2.5 square meters to power non-energy-intensive devices, preferably one for energy-intensive ones. From the meter to the distribution boxes it is recommended to use a cable with a cross-section of 4 squares.

How to dismantle old wiring

So, when you know where and what kind of outlet you should have according to plan, we proceed to dismantling the old wiring. The dismantling procedure entirely depends on how the old wiring was laid: laid in special channels inside the wall or embedded in the wall, but about all this in order.
Before carrying out all electrical installation and dismantling work, it is necessary to disconnect all apartment wiring coming from the meter, and directly power the extension cord from the meter for temporary power supply.
If the wiring was laid in channels, then its dismantling and installation of a new one is carried out simultaneously. That is, we wind a new one to one end of the old cable and pull out the other end of the old wiring - this way you won’t have to break the walls to dismantle the old wiring and have difficulty installing new wiring. But if the plan for the new wiring does not coincide with the plan for laying the existing one, then grooves will need to be punched in the walls.
In the case where your apartment wiring was embedded in the wall, then first of all you need to determine where it is laid, and only then dismantle it and install a new one. You can also find wiring in the wall visually by seeing embedded grooves on the surface of the wall, or by using a special device.

How to install wiring correctly

Installation of new wiring is carried out as follows: we mark on the wall where the new wiring will go. After this, using a grinder and a hammer drill we make grooves - the most The best way for the walls of a panel house. We recommend laying the wiring in corrugation, as this is additional safety, and next time replacing it will not be so difficult, since a new cable can be installed by pulling out the old one.

When the grooves for the cable are made, first of all we run the cable from the meter to the distribution boxes. We place the cable in the corrugation and lay it in these grooves, fixing it to the wall with alabaster, every 1-1.5 m. Next, from the distribution boxes we lay the cable (also in the corrugation) to sockets, switches and lighting fixtures. The cable outlet for the socket and for the switch must be at least 15 cm. The next stage of work is connecting the cable branches with the main one in junction boxes. We would like to draw your attention to the fact that the cable connection is made using a special terminal block, and not using twists. Such a connection will be better and safer. When all the work in the distribution boxes has been completed, we move on to the apartment power supply.
The final stage of work is connecting the apartment wiring to the meter. If you have old meter and old machines - it is better to replace them. Perfect option- invite electricians to install a new cable from the distribution panel at your entrance to the meter, and also replace the meter itself. We recommend installing the meter in a special metal panel, where electrical breakers are also installed. As for automatic machines, we recommend installing a two-phase one. How many amperes should be in the machine - determine based on what equipment you will be working at the same time. The power consumption of these devices is added up and divided by 220, thus obtaining the amperage of the machine. After all the work with laying a new cable into the apartment, replacing the meter (sealing) and installing the machine is completed, the last thing we do is connect the apartment wiring to the machine and then turn on the machines. If the machine is not knocked out, then everything is connected correctly, we check all sockets and switches for functionality.
Materials needed to replace the wiring in the apartment:

• Cable;


• Sockets and switches (frames);


• Socket boxes;


• Distribution boxes;


• Corrugation;


• Terminal blocks;


• Electric automatic;

How much does it cost to change the wiring in an apartment?

If you decide to replace the wiring using the services of special companies, then, as a rule, one point, according to average estimates, will cost you around 500 rubles. That is, to install 2 sockets and 2 switches, it will cost 2000 rubles, not counting the materials: box, cable, socket or switch. To this we must also add the cost of laying the cable from the panel to the junction box and the cost of materials. Thus, replacing the wiring in one-room apartment It will cost you from 7,000 rubles.
The cost of replacing the wiring yourself will be several times cheaper, since for this you only need to buy required material, and also have: a grinder with a disc for concrete, a hammer drill with attachments for grooves, alabaster and auxiliary tools.