How many outlets in your apartment? Five? Ten? More? And how many of them are always free? I bet that at least half. What are they for?

These sockets are most often used to connect various portable power consumers. To distinguish them from the rest is quite simple: they can be connected anywhere, without really bothering - there would be a 220 volt outlet.

The most typical portable power consumers are hand-held power tools: a grinder, a drill, a hammer drill, and the like. Something must be done somewhere: they picked up the tool for carrying and worked in any conditions. The work is over - the tool is carried away in a long time, al will soon come in handy in a completely different place. But portable power receivers are not only a power tool ...

According to unbiased statistics, more than two-thirds of all sold electric boilers account for accumulative-type units. And these devices, unlike flowing electric heaters, require regular preventive maintenance.

By the preventive maintenance of boilers is meant the removal of sludge that has fallen to the bottom, the replacement of the magnesium anode, and the cleaning of the surface of the heating element (TENA) from the scale that has formed.

As a rule, depending on the individual characteristics of your tap water, the frequency of preventive maintenance of a storage water heater is from one to one and a half years. Nothing difficult in the prevention of the heater is not observed. And now you will see for yourself. ...

By the new year, Mikhail Vanyushin, the author of a training video course on electrical engineering and the basics of electronics, has released a new DVD.

Continuing the study of electrical processes, a circuit was built on the disk, according to which a smooth transition was made from the general concepts of electrical engineering to more specific and detailed ones. In the second part of the course, the main emphasis is placed on a deep study of electronics, the operation and arrangement of semiconductor devices, as well as their application in frequently encountered electronic circuits, are shown.

The science of electronics began to take shape at the beginning of the century, when the first electronic devices were created. Compared to other sciences, such as physics and chemistry, which have accumulated knowledge for hundreds of years, electronics is quite young. However, the practical results of research in this area have produced a technical revolution that has revolutionized the world ...

Have you ever observed fused plastic enclosures of apartment switchboards? Do you know the kind of brutally charred and burnt-out zero wires? Well, maybe you saw a dull sight, which is a hedgehog sticking out in different directions from the wires of wires and cables, planted in an access panel under a common bolt, even without a washer?

All these are vivid examples of frank neglect of the need to terminate wires and cable conductors. It’s not enough to get the cable into the device, you still need to worry about connecting it with a reliable electrical contact, about a minimum transition resistance.

The transition resistance is inherently a resistor on which heat is generated, and the amount of this heat will be the greater, the greater the current load of the wire. Actually, thanks to this heat everything burns and melts ...

For most of its inhabitants, the electrics in an apartment are, first of all, numerous switches and sockets. As a rule, there are too many of them. But neither sockets nor switches are hanging in the air - they need to be somehow fixed to the wall.

Sockets and switches are of two types: for hidden and for open wiring. Accordingly, the method of installing sockets and switches depends on the method of wiring. The final choice of devices for installation, that is, reinforcement, also depends on the material of the walls on which the installation is carried out. Under certain conditions, it is even possible to install, as they say, “without everything,” that is, simply onto a wall.

So, we will consider how to install sockets and switches depending on the type of wiring. For hidden wiring the main thing - the material and quality of the walls. If the wall is flat and non-combustible, such as brick or concrete, or if it is tiled ...

Many people are very familiar with the white coating that appears on the electric kettle TEN, which must be cleaned or eliminated with citric acid. This coating is an insoluble calcium and magnesium salt falling out of the water when heated. The higher the temperature, the more active the deposition occurs, and in the hottest area.

The concept of “hard water” characterizes precisely the amount of calcium and magnesium. In hard water, soap foams poorly, and the precipitate in the kettle constantly boils when boiled. Almost all water from wells and boreholes is hard.

At the heating heater of the boiler, the same process of salt deposition occurs. Over time, this layer becomes quite thick and significantly impairs the transfer of heat from the heater body to the water, which means the cost of heating additional electricity ...

Today, the light decoration of a room not only fulfills its main function, but also brings elements of comfort to the surrounding space. The interior will look more vivid and original if you arrange suspended ceilings in the shape of a starry sky. Such a ceiling will be a great alternative to the traditional lighting in your room. The star ceiling will decorate your room.

In addition, with the help of this design it is possible to identify the functional areas of the premises. So, you can separate the workspace from, for example, a recreation area.

Modern and most realistic "star ceilings" are usually made using fiber optic technology and microprocessor control. Consider the process of creating a "starry sky" ceiling using optical fiber and a projector. Tools and materials ...

The kitchen in a modern house, if the hostess likes to cook, is increasingly reminiscent of the control room from the movie "Stargate". To ensure comfort in your home and not to burn wiring, when organizing kitchen power supply, you need to take care in advance that the total power of electrical appliances corresponds to the cross-section of the electrical wiring, the presence of correctly selected protection devices, the number and location of electrical outlets and switches.

Now let's discuss everything in order. As always, the power supply to the kitchen should begin with the project and think about what you have at the moment and what you want to see in the future. You should always set reasonable requirements according to your budget. It is one thing if you want to make a complete repair in the apartment, with the replacement of the old apartment wiring and quite another - this is a partial modernization of the wiring. In the first case, the posting money is leveled ...