Any leak is an undesirable occurrence. In the normal mode of operation of any electrical system, the current should flow only along the electrical circuits relative to the phases and zero (figuratively speaking). The resulting current relative to the ground will be this same leak. It can occur as a result of a breakdown on the case, which is initially grounded, if a person accidentally touches a person carrying parts (leakage current will pass through the body of this person), obsolescence of the wiring, etc.

The best option for connecting an RCD (residual current device) is the maximum proximity to the power input. Since the gap between the electric network and the electric meter is subject to strict control of electric power organizations, it is nevertheless more correct to install an RCD immediately after the electric meter. This ensures complete protection against all kinds of earth leaks throughout the circuit ...

How can a girl replace an outlet on her own.

Even the most fashionable interior can spoil such a trifle as an old outlet. Most often, the hostess notices them last, and changing it is simply scary, because you still have to deal with electricity.

Of course, you can call a specialist, ask a neighbor, and the husband probably understands them. But what to do for a young and active girl who still lives without a husband, ends up working simultaneously with those services that can help, and the neighbor does not cause any trust.

In fact, the devil is not so terrible as he is painted. Of course, we are not ardent feminists, but we can easily cope with such a trifle as a socket. So, step by step instructions for replacing the outlet ...

This figure shows a simplified wiring diagram for connecting a switch, outlets, and lamps. It is quite common and is widely used in the electrification of residential apartments, basements, garages, industrial, construction objects, etc. And now let's deal with this scheme in more detail.

For a better understanding, the connection diagram of the switch, sockets and lamps is drawn as it is usually located during its installation.

Let's start with the electrical panel. Each house and apartment must have a shield to which the input from the main power line (from the nearest power pole or from the main distribution panel on the site) is suitable ...

The principle of operation of this device and the pros when using it.

As you know, incandescent lamps and the so-called halogen lamps very often fail. This is often due to unstable mains voltage and the very frequent inclusion of lamps. Even if low voltage lamps (12 volts) are used through a step-down transformer, still the frequent switching on of the lamps leads to their rapid combustion. For a longer service life of incandescent lamps, a device for smoothly switching on lamps was invented.

A device for smoothly starting incandescent lamps ignites the lamp spiral more slowly (2-3 seconds), thereby eliminating the possibility of lamp failure at the time of filament ...

Today, the use of expensive household electrical appliances in your life plays a fundamental role in comfort and greatly facilitating the performance of various work. But how often do electrical appliances fail? What is the main reason for the cessation of their functioning and how to protect electrical appliances from premature failure?

Today, almost all imported equipment has units protecting the device from power surges, which burn out with a high voltage surge, but do not allow the device to completely fail. However, the electrical appliance must be taken to a repair shop to replace the fuses.

How to secure electrical appliances in your home or office?

Reason for switching to energy-saving LED products. Comparison and simple mathematical calculation of the savings and benefits of the purchase in the long run.

Today, many talk about new energy-saving technologies. That in the near future the traditional "Ilyich bulbs" will live out their Century and a new era is coming, or rather the electrical LED revolution.

This issue has risen to the state level. Starting with the President, who gave instructions to the state corporations Rosstekhnologii and Rusnano, to introduce energy-saving technologies, due to the fact that electricity is not used up efficiently and it is time to break stereotypes and keep up with the times. Factories will be built in a short time on the territory of Russia, where they will produce LED products ...

We make a powerful uninterruptible power supply based on a standard UPS by connecting two KAMAZ batteries to it. We also do automatic ventilation when switching to offline mode.

Such is the reality that Russian power grids force consumers themselves to take care of the stability of the electricity they receive. In our case, it is necessary to solve two important problems: a large voltage drop (typical for the hot / cold season, when the air conditioners / electric heaters turn on) and a complete blackout (“knocking out” of machines, accidents at substations, etc.).

If the first problem is easily solved by installing an autotransformer, which allows to obtain a stable voltage of 220 volts at the output, then the second requires the organization of an uninterruptible power system, designed for a long battery life ...

This circuit of connecting an electric meter (single-phase and three-phase) is called direct. It is the most simple and quite common in its use in practice in everyday life.

According to the norms, up to 3 kW is allocated for one apartment (for apartments with an electric stove - 7 kW). At this power, the current will lie within 13.5 A.

On the counters there is an inscription about its characteristics, among which the rated and maximum currents are indicated (for example, it is usually written like this: 5 - 15 A, or 10 - 40 A.). Since the counter current lies in the normal aisles of the current consumption, they are connected in a direct way (without additional current transformers).

Despite the huge variety of electric meters produced, the location of the connection terminals they all have the same. On the terminal cover itself (on the inside) there is a drawn connection diagram (just in case, if you forgot how to connect the meter) ...