It would seem that in such an area as the wiring of sockets and switches, there can be nothing new. However, this is not so. The technology of their installation and the design itself are being improved. For flush mounting, they are installed in universal mounting boxes, made mainly of plastic. On the back of the box are easily removable plugs, designed to enter wires of various diameters and tubes protecting them.

Boxes designed for installation in hollow walls are equipped with special fixing screws with tabs that can fix the product on the front surface of the wall made of any material from 1 to 35 mm thick. The holes for the boxes in the hollow walls are drilled using a special nozzle, the diameter of the cutting part of which is equal to the diameter of the box. The standard diameter is 68 mm.

If the mounting boxes are installed in stone and concrete walls, they are connected to them through channels in wall panels or through flexible plastic corrugated pipes laid in strobes. The box itself is usually fixed in the wall hole with gypsum, cement-sand mortar or special glue ...

In 1892 in London, and a year later in Philadelphia, a well-known inventor, a Serb by nationality, Nikola Tesla demonstrated the transmission of electricity through a single wire.

How he did this remains a mystery. Some of his records have not yet been decrypted, another part has burned down.

The sensationalism of Tesla's experiments is obvious to any electrician: after all, for the current to go through the wires, they must be a closed loop. And then suddenly - one ungrounded wire!

But, I think, modern electricians will have to be even more surprised when they find out that a person works in our country who also found a way to transfer electricity through one open wire ...

In the United States, the end of the world was already - in August 2003. It all started on August 14, at 16:10 Eastern time, the same for part of the USA and Canada. It was at this hour that the recording instruments in the energy ring surrounding Lake Erie (one of the five Great Lakes) recorded the first deviation from the norm: three power lines in northern Ohio failed. In the next three minutes, voltage was removed from several dozen lines, 21 power plants were decommissioned, and the vast territory that covered part of North America, including pieces of the USA and Canada, was left without electricity. According to various estimates, from 30 to 50 million people were in the disaster area. The Western press unanimously dubbed the incident "the largest energy accident in the history of North America."

America really still did not know anything similar in scale. Huge traffic jams (traffic lights do not work), metro that got up, stopped plants, factories, shops, quiet offices. Canceled and delayed departures from all civilian airports in the disaster area ...

This example is the answer to those who think that automation is something complicated and terribly expensive. A socket with a built-in motion and light sensor for $ 25 will allow you to comfortably enter the garage, pantry and other office space. And you do not have to worry about turning it on or off. The result is ease of use and energy savings.

This device allows you to change the level of illumination at which the light will turn on, the viewing angle of the motion sensor (you can get a maximum of 360 degrees) and the duration of the on (from 5 to 100 seconds).The socket is compatible with incandescent lamps up to 60 watts, and also supports economical 20-watt bulbs.

The most powerful electric current
The most powerful electric current was generated at the Los Alamos Science Laboratory, New Mexico, USA. With a simultaneous discharge of 4032 capacitors, combined into a Zeus supercapacitor, within a few microseconds, they give twice as much electric current than that generated by all the power plants of the Earth.

Highest voltage
On May 17, 1979, at the National Electrostatics Corporation, Oak Ridge, Tennessee, USA, the highest electric potential difference was obtained in the laboratory. It amounted to 32 ± 1.5 million V.

Static electricity arises from the inequality of charges (negative and positive) between two objects. When discharged, a spark arises. This process causes an irritant effect on the human body, sometimes quite noticeable.

How to minimize this shock? We must not forget and adhere to the following rules:

1. Limit contact between moving bodies. The body is a static charge collection point (initially blocked, with no exit), free electrons are collected. This is especially observed with friction (feet on the carpet, etc.).

2. Place a layer of cotton between materials prone to conduct static electricity ...

Electrician, many have heard about this profession, but only a few have grasped its deep essence. You can master the skills of laying wires and breaking out outlets in a month, but it takes a lifetime to become an electrician.

This craft implies a completely unique way of thinking, inaccessible to representatives of other professions, I will explain: the assembly craft requires a person to fully mobilize consciousness, this has several manifestations.

Firstly, both the master and. moreover, the convert must absolutely clearly understand what and how he is doing, scrolling the words of fellow teachers again and again in his head, in his eyes only the plan, diagrams, drawings, numbering of rooms, if the electrician is distracted even for a moment the whole computer network.

Secondly, this profession requires excellent logic that is turned on automatically, since you need to lay wires at the smallest distances to avoid circles, loops, damage and catch-up from the bosses.

Thirdly, the electrician must be ...