Box for electric machines: types of boxes and their features + nuances of choosing and filling the box

Is it possible to refuse to take the electricity meter outside?

If the owners of the house do not prevent the power engineers from inspecting and taking meter readings, then there is no need to take it out into the street.

If in the agreement with the suppliers the local area is indicated as the installation site, the consumer may demand that this paragraph be changed.

In this case, it would be useful to mention the violation of the above laws.

Installation of the counter outdoors is carried out only with the consent of the consumer. If he signs an agreement and an act to determine the installation point, then the installation of the device on the street acquires legal force (Article 421 of the Civil Code of the Russian Federation).

Advice. To study the documentation of power engineers, you can use the help of an independent expert.

The power supply company is a commercial organization. Its task is to sell electricity. It has no right to force citizens to violate the norms of the current legislation.

The main weapon of the consumer is knowledge of the rules and laws of the Russian Federation. Refusal to take the electric meter outside is the legal right of every consumer.

So, the power supply company does not have the right to require the consumer to install an electric meter on the street. A citizen can do this only at his own request.

To install the meter in compliance with the standards established by the legislation of the Russian Federation, you should resort to the help of a specialist.

Do you have any questions? Just call us:

What is the OPS for?

We continue to disassemble the assembly of the 220 Volt electricity metering board and now it's time to consider another device, which is called the OPS. This is a surge arrester. To ensure correct operation, this device must be grounded. In the shield, the alarm system should be installed parallel to the introductory machine.The principle of operation of this device is quite simple, and it consists in creating a short circuit inside itself.

Surge arrester

Experts say that this is a disposable device, and after operation it must be replaced. The appearance of the OPS resembles a circuit breaker. However, instead of a flag, there is an indicator on its design. If you are connecting a suburban area to the mains, then installing an alarm system is mandatory. In specialized stores you can find OPS of the following categories:

1. "B". This type should be mounted on input. It allows you to provide protection against lightning, as well as overvoltage.
2. "C". You need to mount the device in the switchboard. This option is intended to protect internal wiring as well as circuit breakers. Category “C” is by far the most common.
3. "D". It should be installed on the consumer. OPS category "D" allows you to provide reliable protection against high-frequency interference and overvoltage.

Now it's time to consider the main element of the control room - the counter.

Basic connection principles

To connect the RCD in the shield, two conductors are needed. According to the first of them, the current flows to the load, and according to the second, it leaves the consumer along the external circuit.

As soon as current leakage occurs, a difference appears between its values ​​at the input and output. When the result exceeds the set value, the RCD trips in emergency mode, thereby protecting the entire apartment line.

Residual current devices are negatively affected by short circuit (short circuit) and voltage drops, so they themselves need to be covered. The problem is solved by including automata in the circuit.

The RCD has a ring-shaped core with two windings. The windings are identical in their electrical and physical characteristics.

The current that feeds electrical appliances flows through one of the core windings in one direction. It has a different direction in the second winding after passing through them.

Self-execution of work on the installation of protection devices involves the use of schemes. Both modular RCDs and automatic devices for them are installed in the shield.

Before starting installation, you need to solve the following questions:

• how many RCDs should be installed;
• where they should be in the diagram;
• how to connect so that the RCD works correctly.

The wiring rule states that all connections in a single-phase network must enter the connected devices from top to bottom.

Professional electricians explain this by the fact that if you start them from below, then the efficiency of the vast majority of machines will decrease by a quarter. In addition, the master working in the switchboard will not have to further understand the circuit.

RCDs designed for installation on separate lines and having small ratings cannot be mounted on a common network. If this rule is not observed, both the likelihood of leaks and short circuits will increase.

Choice of the circuit breaker according to the type of characteristic.

There are various time-current characteristics (VTX) of circuit breakers. We analyzed them in detail in one of our previous articles, for those who are interested, we advise you to definitely read them - here.

Time current characteristics of circuit breakers B C D

If we consider the issue more generally, then we can distinguish several main characteristics: B, C, D. These characteristics determine at what amount of current the machine will turn off instantly.Tripping parameters for characteristics B, C, D:

1. B, from 3 to 5 ×In;
2. C, from 5 to 10 ×In;
3. D - from 10 to 20 ×In.

In is the rated current of the circuit breaker. That is, we take the rated current of the machine, for example 16A and get the following data:

1. A circuit breaker with characteristic B16 will open instantly at a current value of 48 to 80 A;
2. An automatic machine with characteristic C16 will turn off instantly at a current of 80 to 160 A;
3. An automaton with characteristic D16 will turn off instantly at a current of 160 to 320 A.

It should be noted that automatic devices with characteristic D are used mainly in industry. In domestic networks, devices with characteristics B and C are mainly used.

Automatic machines with characteristic C are used to provide protection for group lines and individual devices with a large starting current. Breakers with characteristic B are mainly used to implement the protection of lighting lines and devices with low starting current.

Selectivity of automatic switches.

When choosing an automatic shutdown device, it is important to pay attention to such a parameter as selectivity. By selectivity is meant such a technical solution, in which, in the event of a fault, the faulty line is switched off directly, and not, for example, a group line. Selectivity is implemented in two ways:

Selectivity is implemented in two ways:

1. Selection of the rated current of the circuit breaker;
2. selection of characteristics of the circuit breaker;

Characteristics of circuit breakers

For group lines, you should choose machines with characteristic C and with a large rated current (rated current in the group line).For the supply line of one load, you should choose machines with characteristics B and C, while if the load has a low starting current, then you should choose a device with characteristic B.

Choice of circuit breaker according to the number of poles.

Depending on the mains voltage, the following circuit breakers can be used to protect devices and supply cables:

For a 230 V network:

1. Single pole;
2. bipolar.

For a network of 400 V (380V):

1. Tripolar;
2. four-pole.

Selection of circuit breakers by number of poles

Single-pole and three-pole machines switch phase conductors. Two-pole and four-pole circuit breakers, in addition to phase conductors, also switch neutral conductors.

Selecting a circuit breaker by manufacturer.

Selecting a circuit breaker by manufacturer

Many are wondering what brand of circuit breaker to choose? To begin with, you should decide on the segment and available budget. So the leading players in the premium segment are the following manufacturers:

1. ABB - devices of the Swedish-Swiss company, are currently the leader in quality, reliability and, accordingly, the high cost of automatic devices;
2. Legrand (France) - devices are in many respects similar to ABB in terms of quality and price, - reliable circuit breakers;
3. Schneider Electric (France) - excellent devices that have proven themselves well in the market of the CIS countries.

Automatic switches of the middle price segment:

1. Moeller (Eaton) is a German brand. High-quality circuit breakers at an affordable cost;
2. Siemens is a German brand.It also produces high-quality automation, which is slightly inferior to ABB, Legrand and Schneider Electric.

Budget segment machines are presented in large numbers; many devices from Chinese manufacturers fall into this category. In general, there are several “more or less” sane brands: KEAZ, DEKraft, IEK. However, we would recommend that you use circuit breakers from the premium or medium price segment.

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Selecting an installation site

The electric box for outdoor installation is mounted under the base of non-combustible material. The lower edge of the box cabinet must be at least 100 cm from the floor level, and the upper part must not exceed 180 cm. Lowering the level is allowed if disabled or elderly people live in the living room.

Places prohibited for the installation of an electrical panel:

• near heating systems;
• in showers;
• outside the residential premises, with the exception of metering boards;
• in the bathroom;
• in the ventilation shaft;
• flight of stairs;
• loggias and balconies.

How to choose a tool box?

When buying boxes for storing tools, you should consider the following nuances:

1. Regularity of use. Higher quality models that are constantly used in work are suitable for professionals. For the home, the wear resistance of the product is not so important.
2. Type of content. It is worth considering what will be stored in the container: hand or power tools, whether there will be small components.
3. The size of the model you like.
4. Number of compartments, sections or pockets.
5. The presence of a folding or sliding mechanism.
6. The organization of the opening of the lid and the type of locking connection.
7. The presence of auxiliary elements for movement: a recessed handle, shoulder strap, wheels.
8. Body and lock material.

Toolbox Rating

When choosing a tool box, you can be guided not only by the functional criteria of the model you like, but also by the reviews of the owners of such storages. The rating of the most popular varieties includes:

1. Bosch LT-BOXX – a professional container without a lid, made of reinforced plastic. Equipped with a convenient carrying handle. The cost is $94.
2. Wilton 16910U – a handy aluminum tool box for the home, reinforced with steel hinges and equipped with a large number of compartments for small parts. When empty, it weighs about 3 kg. The cost is $34.
3. Stanley IML Mobile Work Center - a capacious plastic tool box on wheels with a large number of compartments, which is easily transformed into two full-fledged containers. The price is $51.
4. Keter Canti Trio is a sliding storage system with three drawers, which are equipped with a large number of dividers for storing small items. The cost is $54.
5. Stanley Basic Toolbox - a capacious box for storing hand tools, equipped with organizers for small parts and a soft pad on the carrying handle. The cost is $35.

5. Way of connecting wires in junction boxes

Any connection of wires has a transient resistance, voltage drops across it. Which means it's heating up. The circuit breaker protects not only the cable, but also the connections in the switchgear. boxes. And the better they are, the less likely it is that during a short circuit or overload, the twist will burn out.

I believe that all types of connections have the right to life - and Vago terminals, and twisting with soldering, and sleeves, and welding, and simple twisting. And their quality depends primarily on the conscience and professionalism of an electrician.

Taking into account the contacts, the maximum current of the electrical system must also be reduced to 0.7 of the max. cable current. And this is 19x0.7 = 13.3A

The choice of RCD according to the main parameters

All the technical nuances associated with the choice of RCDs are known only to professional installers. For this reason, specialists must make the selection of devices during the development of the project.

Criterion #1. The nuances of choosing a device

When choosing a device, the main criterion is the rated current passing through it in long-term operating modes.

Based on a stable parameter - current leakage, there are two main classes of RCDs: "A" and "AC". Devices of the last category are more reliable

The value of In is in the range of 6-125 A

The differential current IΔn is the second most important characteristic. This is a fixed value, upon reaching which the RCD is triggered.

When it is selected from the range: 10, 30, 100, 300, 500 mA, 1 A, safety requirements have priority.

Influences the choice and purpose of the installation. To ensure the safe operation of one device, they are guided by the value of the rated current with a small margin. If protection is needed for the house as a whole or for an apartment, all loads are summed up.

Criterion #2. Existing types of RCD

It is necessary to distinguish between RCDs and types. There are only two of them - electromechanical and electronic. The main working unit of the first is a magnetic circuit with a winding. Its action is to compare the values ​​\u200b\u200bof the current leaving the network and returning back.

There is such a function in the device of the second type, only the electronic board performs it.It only works when voltage is present. Because of this, the electromechanical device protects better.

The electromechanical type device has a differential transformer + relay, while the electronic type RCD has an electronic board. This is the difference between them

In a situation where the consumer accidentally touches the phase wire, and the board turns out to be de-energized, if an electronic RCD is installed, the person will be energized. In this case, the protective device will not work, and the electromechanical device will remain operational under such conditions.

The subtleties of choosing an RCD are described in this material.

Necessary tools and preparation for work

The scheme is drawn up, the arrangement of elements is thought out. Next, it's time to install the box itself, if you haven't already done so. Installation of switchboards is carried out according to its type: it can be recessed into the wall (you will have to cut an opening) or simply attached to it, protruding to a certain width. The insert of the box is carried out using a grinder with a diamond wheel. The box is applied to the wall, outlined with a pencil or chalk along the contour, then a rectangle is cut out, it is “crushed” into squares with a diamond disk, and then they are knocked out to the desired depth with a puncher or chisel. Fastening is done with dowels or self-tapping screws.

Also, to connect, you will need screwdrivers (phillips and regular), a multimeter (for ringing), a stripping knife, terminals for connecting wires or a soldering iron with tin and solder for soldering. We recommend using terminals - they are reliable, inexpensive and significantly speed up the assembly process.

Wiring diagram and its creation

1. An input is directly carried out from the electric pole (only electricians can connect the input to the general network). The wires are wound into the shield.
2. An electric meter is mounted on a DIN-rail.
3. From it, automatic machines are placed on each wire.
4. Outgoing wires are passed through the body of the shield and bred throughout the house.
5. Grounding is a must. It can be a three-core cable or a separate wire that starts at zero.
6. You can install additional machines. They are connected in parallel from the inputs of the two main packets.

Switchboard

Under the terms of the PUE, it is required to install another machine at the entrance to the house, in front of the meter. This allows you to manipulate, turn off, replace the counter.

However, now due to the many cases of fraud, electricians may, on the contrary, require that the meter be connected directly.

Selection of the circuit breaker rating by current and load power

To select a suitable machine, it is convenient to calculate the current strength per kilowatt of load power and compile the appropriate table. Applying formula (2) and a power factor of 0.95 for a voltage of 220 V, we get:

1000 W / (220 V x 0.95) = 4.78 A

Considering that the voltage in our electrical networks often falls short of the prescribed 220 V, it is quite correct to take a value of 5 A per 1 kW of power. Then the table of the dependence of the current strength on the load will look like in table 1, as follows:

power, kWt	2	4	6	8	10	12	14	16
Current strength, A	10	20	30	40	50	60	70	80

This table gives an approximate estimate of the strength of the alternating current flowing through a single-phase electrical network when household appliances are turned on.It should be remembered that this refers to the peak power consumption, and not the average. This information can be found in the documentation supplied with the electrical product. In practice, it is more convenient to use the table of maximum loads, taking into account the fact that the machines are produced with a certain current rating (table 2):

Wiring diagram	Ratings of automatic machines for current
	10 A	16 A	20 A	25 A	32 A	40 A	50 A	63 A
Single phase, 220 V	2.2 kW	3.5 kW	4.4 kW	5.5 kW	7.0 kW	8.8 kW	11 kW	14 kW
Three-phase, 380 V	6.6 kW	10,6	13,2	16,5	21,0	26,4	33,1	41,6

For example, if you need to find out how many amperes an automatic machine is needed for a power of 15 kW at a three-phase current, then we look for the nearest larger value in the table - it is 16.5 kW, which corresponds to an automatic machine for 25 amperes.

In reality, there are restrictions on the allocated power. In particular, in modern urban apartment buildings with an electric stove, the allocated power is from 10 to 12 kilowatts, and a 50 A automatic machine is installed at the entrance. It is reasonable to divide this power into groups, taking into account the fact that the most energy-intensive appliances are concentrated in the kitchen and in the bathroom. Each group has its own automatic machine, which makes it possible to exclude a complete de-energization of the apartment in the event of an overload on one of the lines.

In particular, it is advisable to make a separate input under the electric stove (or hob) and install a 32 or 40 ampere machine (depending on the power of the stove and oven), as well as a power outlet with the appropriate rated current. Other consumers should not be connected to this group. Both the washing machine and the air conditioner should have a separate line - a 25 A automatic machine will be enough for them.

To the question of how many outlets can be connected to one machine, you can answer with one phrase: as many as you like. Sockets themselves do not consume electricity, that is, they do not create a load on the network. You just need to make sure that the total power of the electrical appliances turned on at the same time corresponds to the cross section of the wire and the power of the machine, which will be discussed below.

For a private house or cottage, the introductory machine is selected depending on the allocated power. Not all owners manage to get the desired number of kilowatts, especially in regions with limited power grids. But in any case, as for city apartments, the principle of dividing consumers into separate groups remains.

Introductory machine for a private house

General information about the electrical panel

The electrical switchboard is a box that compactly accommodates:

• electricity metering device (electric meter);
• RCD (residual current device);
• circuit breaker for electrical wiring.

Depending on the type of material and method of installation, electrical panels are:

• with a plastic or metal case;
• overhead or embedded.

Product body

On sale there are electrical panels with a plastic or metal case. Moreover, the plastic material has increased resistance to high temperatures, which is of great importance for fire safety. Models made of this material have a stylish look, so they easily fit into any interior.

There are a lot of modifications of the metal shield and, if necessary, it is not difficult to choose a box with the necessary equipment.

box type

Depending on the type of electrical box in the room, two types of switchboards are used:

• built-in, which experts recommend for hidden wiring;
• overhead - installed in rooms with external electrical wiring. For fastening such a shield, self-tapping screws or a dowel-nail are used.

The built-in shield is compact in size and attractive in appearance. According to the recommendations of experts, its installation is carried out in a specially equipped niche made of alabaster and gypsum.

Telescopic system: pros and cons

As for these systems, they are considered more practical.
and durable. Their main advantages include:

• Ease of installation - this is easy to explain if
  take into account that such a system does not have a left or right bar classification, they
  are exactly the same, so it is impossible to get confused during the installation process.
• Safety and ease of use - how
  no matter how far you pull out the box, it will not fall to your feet along with
  content. This indicates its strength and the quality of fixation of the mechanism itself,
  which provides full extension without loss of strength.

In fact, their design is not much different from the ball
system, as well as the method of installation. These are the same two pairs of planks that
are established both on a lateral surface of cabinet furniture, and on a box.

Such a system can be found not only on drawers, but also on wardrobes or sliding doors, which are used in the design of narrow hallways or in the interiors of one-room apartments, where every meter counts.

When installing such a mechanism, take into account all dimensions,
prescribed in your drawing: the width, height and depth of the box. Don't forget that
the retractable mechanism also takes up space, and to install it you need to advance
provide a gap of the desired width. Too wide a distance will cause
that the box will not be able to fix, and too narrow - will not allow it
install.

Here is an example of calculations using the example of one box, for an ideal
its location:

As you can see, make and install a drawer with your own
hands easily and simply, if you know the principle of fixing it in a moving system.
To increase the service life, it is necessary to periodically inspect
systems and do their preventive maintenance, by cleaning and lubricating, if necessary.

Device, principle of operation and types of introductory machines

Switching devices of an electric line that provide protection against overloads and short-circuit currents are called a circuit breaker. It is designed to ensure the safety of the power line in the event of an emergency.

This definition applies to all switching devices that are installed in the electrical panel. The main difference between the introductory automaton and the linear one is that it has a larger value of the rated current.

And it is calculated depending on the permitted power consumption of electricity. Introductory machine (VA) - the second stage of protection, used as a switching device. In the event of an overload or short circuit, the line element must operate first.

VA has two degrees of protection:

• Overload protection. It is a bimetallic plate. When the permissible current is exceeded, it heats up. As a result, it bends and activates the thermal release mechanism. The greater the load, the more current flows through the plate. The heating rate increases.And the machine works faster. Once turned off, the device cannot be turned on immediately. It takes time for the bimetallic plate to cool down and take its original position. Only then can the device be put into operation.
• Short circuit protection. The machine has a current coil (solenoid). When a short circuit occurs in the line, an instantaneous increase in current occurs. The solenoid retracts the core, the current protection is triggered and the power is turned off. The response time is fractions of a second.

VA are mounted before or after the electricity meter on a DIN rail. Depending on the supply voltage, they can be single-pole, two-pole, three-pole or four-pole. Bipolar are installed when a single-phase voltage of 220 V is connected.

Mounted in apartments of multi-storey buildings. Three-phase voltage is supplied to provide electricity to cottages or private houses. Four-pole VA are used for their connection. Previously, three-phase voltage was not connected, single-phase voltage was supplied to old houses.

As introductory switching systems, the PUE prohibits the installation of single-pole machines. Due to the variation in response time, they cannot provide the necessary protection, which will lead to equipment damage or fire.

VA are characterized by:

• Rated current. A nominal value is applied to the body of the device, at which the device can operate for a long time without shutting down, for example, C40. This means that VA can handle up to 40 amps indefinitely. However, these indications are determined for an air temperature of 300C.At a lower temperature, the VA withstands currents higher than the nominal one. And at higher temperatures, the thermal protection operates at lower loads. This should be taken into account when choosing a place where the introductory shield will be installed;
• Number of poles. For single-phase voltage, two-pole devices are used, and for three-phase, four-pole devices. Some experts mount three-pole, which does not provide reliable protection;
• An important indicator is the time for which the machine works. When overloaded, this time can vary from several tens of minutes to several seconds. It depends on the amount of current flowing through the bimetallic plate. The short circuit protection works in a fraction of a second.

All installed devices must be matched in current. For example, if the meter indicates a current of 40 A., then the VA must be rated for a current of less than 40 amperes. And linear devices in total should not exceed the current VA.

Automata are divided into three subgroups B, C, D:

• B - these are the most "gentle" devices. Allow loading with starting currents not exceeding 3-5 nominal values ​​indicated on VA;
• C - common machines installed in private houses and apartments. The excess of starting currents varies from 5 to 10 times from the nominal value;
• D - used in networks with high starting currents and short-term overloads. The excess is 10-20 times the nominal value.

Pros and cons

There are a lot of advantages of sliding systems for kitchen drawers:

• The availability of each item and accessory, a good overview of the contents of the shelf.
• The functionality and ergonomics of the headset are improved.
• The systems save space and make even small kitchens comfortable.
• Save time when cooking due to convenience and maximum access to all shelves.
• The price and type of retractable system can be selected according to your needs.

Retractable systems have many advantages.

The disadvantages of such fittings are not obvious, but they can be called:

• High price for the most functional samples of retractable systems.
• The structural complexity of the fittings, due to which, if improperly used or initially incorrectly installed, breakdowns can occur.

Technical characteristics of boxes

When choosing a box for automatic machines, it is necessary to be guided by its technical characteristics. They determine the number of protective devices that can be placed in each particular cabinet, under what conditions it is permissible to operate it, and how safe it is from the point of view of electric shock.

Insulation reliability class

Chapter 2 of GOST 12.2.007.0-75 defines 5 classes of electrical products according to the method of protecting a person from electric shock. Electrical boxes for automatic machines belong to classes I and II. Their properties are:

• class I - electrical apparatus equipped with working insulation and an element for grounding;
• class II - apparatus equipped with double or reinforced insulation, but without elements for earthing.

Box material for vending machines

The material of the body of the vending machine box mainly determines its operating conditions and safety of use. From this point of view, there are 2 types of products on sale:

1. Plastic boxes. Usually these are small apartment shields. They are made from heat-resistant ABS plastic that can withstand temperatures up to 650 °C. Such material does not support combustion well, does not rot from moisture and is easy to machine.These factors contribute to the fact that experts prefer plastic boxes.
2. Metal boxes. These products are characterized by class I protection against electric shock. Metal models are coated with a polymer coating that protects them from the harmful effects of moisture and chemically aggressive environments. Metal boxes for machines are necessarily grounded. They are easier to take hits. Therefore, they are installed in places where mechanical damage from the outside is possible.

Box for circuit breakers with grounding bar

Number of rows for machines

Another important characteristic of boxing is the number of rows for slot machines. Circuit breakers are mounted on DIN rails. Each rail is a horizontal row, on which a line of machines will subsequently be located. The wider this row, the more protective devices can be placed in the shield.

There can be several rows in one electrical panel. Each of them, depending on the model of the shield, can accommodate from 2 to 180 standard machines with a width of 17.5 mm.

Permissible stresses

The characteristics of electrical panels are indicated in the technical documentation. When choosing this product, you must take into account its maximum operating voltage.

In a typical apartment box, there is a voltage of 220 V AC. In a common floor box, it reaches 380 V. In electrical cabinets of industrial equipment, the voltage can reach 600 V DC.

Outdoor electric meter box: manufacturers

There are several brands of boxes for metering devices on the Russian market. Manufacturers produce boxes that differ in the way they are attached to a house pole or facade, the level of protection and additional functions.Of the imported models, the most popular are Japanese Viko and Swiss ABB. Domestic versions of this equipment are slightly cheaper, but at the same time they are considered to be of sufficient quality. The most popular domestic brands of boxes for street meters are Electroplast, Mekas, IEK and TDM. Also in the courtyards of private houses you can see the boxes of the Turkish company Legrand.

The best option is considered to be a box of the same brand as the street meter itself. In this case, it is possible to achieve complete integration of the device and the shell.

Featured Models

Switchboard models are not tied to manufacturers of modular elements, for example, a Hager electric machine can be installed in an ABB case without any problems. Therefore, their functionality is determined by the ease of mounting and protection class. Among the many manufactured products, some models are especially popular for installation in apartments. But if in industrial buildings the main criterion is reliability, then in apartments it is aesthetics.

For hidden installation, it is recommended to purchase the Hager Cosmos VR118TD shield. Its door is made of transparent plastic, if desired, it can be easily removed from the hinges. The opening direction is up. The box is completed with grounding and zero busbars made of brass. The degree of protection corresponds to IP 31. The number of installed modules is eighteen. This shield has a beautiful appearance, ease of installation and low price.

If you need an external shield, you can purchase the VIKO LOTUS model. This inexpensive model will be especially relevant for residents of Khrushchev. It allows you to place twelve modules. The kit contains tires, all necessary fasteners and a DIN rail.The white color of the product and its darkened door are suitable for any interior.

Building a power supply system without the use of electrical panels is almost impossible. Their installation not only makes it convenient to turn on and off the power supply on certain lines, but also increases the safety of using the power grid as a whole. At the same time, boxes for placing meters and electrical modules are of different placement and can be chosen for any interior.