Light bulbs burn out from power surges, household appliances fail, and even an emergency situation in apartment wiring can occur. Increased voltage is observed during phase imbalance and other problems on the line. Let's figure out how you can protect the electrical equipment of an apartment from overvoltage.

So, for what reasons is the excess voltage in the network? Phase imbalance, surge voltage or so-called voltage surges and fluctuations caused by the difference in load at different times of the day or season. It is worth noting that GOST 29322-2014 says: “the supply voltage should not differ from the rated voltage of the system by more than ± 10%”, which for 220V lies in the range 198-242V. The phase imbalance occurs as a result of the complete burning off of the zero conductor at the entrance to the house, apartment or from the transformer substation, or a strong deterioration of its contact ...

Summer residents who ennoble their site, have to deal with the need to lay wires to connect lamps in the yard, electrify workshops, garages and sheds. The line can be laid underground, but then you need to dig trenches, use expensive armored cables, PND-corrugation and so on for laying. As a result, the volume and cost of the work are quite large. Another option is to lay the line through the air. In this article we will tell you how to lay a wire through the air in the country or in a country house.

To conduct light and install sockets in utility rooms in a summer cottage or in the courtyard of a private house, you need to decide how to lay the cable. We will make a reservation that any building can be in the role of an outbuilding - a barn, a workshop, a garage and a bathhouse. There are three options: laying along the fence and walls, underground cable entry into the building, and laying the cable through the air ...

When repairing an apartment, special attention should be paid to competent wiring. If you miss this moment, a lot of inconvenience may appear, such as a shortage of sockets or their placement behind furniture, too few lighting fixtures or an incorrect lighting scheme. It does not matter whether you do the repair of the wiring yourself or hired specialists - these tips will be useful to you in any case.

The first step is to evaluate: how many electrical appliances will be powered in the room. Then you can find out the exact number of outlets. This should be done when you have already made a plan for future repairs and know the approximate location and dimensions of the furniture. Next, you need to decide where the working area will be, and where the recreation area is - it is also necessary for the distribution of outlets and not only. In this matter, an important role is played by lighting. For any room with a universal and convenient solution ...

The power grid is the foundation of the modern world. Almost all modern household appliances are powered by electricity, because it is a convenient source of energy. But there is a flip side to the coin - a high risk of electric shock. Without the right approach to equipment design and network design, electricity will do more harm than good. Grounding is one way to ensure safety.

Grounding is a complex of solutions and devices for protection against electric shock and ensuring the operation of protective equipment. Domestic power networks have a grounded neutral. What does it mean? If we consider this issue in a simplified manner, then three-phase generators are installed at power plants. Their windings are connected according to the star scheme. The connection point of the windings is neutral.If you ground the junction of the starthen you get a power line with a grounded neutral ...

When connecting electrical appliances to the supply network, one of the main conditions is the selection of a cable or wire of suitable section. But sometimes it happens that you already have some kind of conductor, and you are not sure whether it is suitable for a specific task.

If you connect too much load on the cable, then it will warm up, and maybe even overheat. Because of this, the insulation will melt, which is dangerous with a short circuit, electric shock and fire. This begs the question: "how do you know how much power a cable or wire can withstand?". Let's figure it out! It is immediately worth noting that the cross-section and power of the cable are, in principle, not interconnected. For the conductor, the permissible continuous current plays a decisive role. These values ​​are described in the PUE section 1, chapter 1.3. The fact is that if it can withstand a current of 16A, then in a 220V network it is 3.5 kW, for 380V it is 10 kW, and in a 12V network it is only 192W. Therefore, it is reasonable to talk about the permissible power for the cable ...

A differential automatic machine or differential circuit breaker is a device that combines two protective switching devices - an RCD and a circuit breaker. They are used in 220/380 Volt switchboards in everyday life and in production. In this article we will consider what a difavtomat is, how it is structured and where it is used.

Difavtomats are used to protect wiring from overload, overcurrents, short circuit, as well as to protect a person from electric shock during leaks. Leaks can occur as a result of a breakdown into the body of electric heaters (heating elements), for example, in boilers - water tanks, electric ovens, stoves, washing machines or dishwashers, as well as aging or damage to insulation. All these problems can be localized by installing a device that compares currents between phase and zero, and if more flows through the phase ...

There are three main types of products for connection - these are cables, wires and cords. The first two types are very similar and often differ mainly in the technical conditions of the manufacturers and the definitions used in them. And the third type - cords has some features, for example, the cross-sectional area of ​​these products rarely exceeds one and a half square millimeters, and their flexibility is very high. Therefore, we will tell you about electric cords and their scope.

To understand the electrical engineering terms and for their correct understanding, you need to refer to the legal documentation, such as GOSTs, SNiPs and other documents. GOST 15845-80. “Cable products. Terms and definitions "An electric cord is defined as an" electric wire with insulated conductors of a high class of flexibility. Moreover, in various sources you can find information that the maximum cross-sectional area of ​​their conductive conductors ...

Each house has a mass of household appliances, costing from units to tens and even hundreds of thousands of rubles. In order for her to serve as long as possible, she needs to be monitored, taken care of and carry out all maintenance work, if any. However, only power surges remain a danger.

In household electrical networks, they occur frequently, they can be caused by switching of powerful electrical equipment, as well as problems on the lines, such as poor contact, dilapidated supports, and so on. To reduce the risk of equipment failure due to poor power supply, you can use voltage stabilizers 220V.In this article we will consider what they are and how they differ. Before starting a review of the types of electric stabilizers, we will consider what an autotransformer is, because it underlies most modern stabilizers. Autotransformer - differs from the usual prefix "auto" in the name ...