Installation of electrical wiring in basements. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

Installation of electrical wiring in basements. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electric installation work

Cellars and cellars are made mainly of non-combustible materials and structures. The floors in these rooms are usually conductive - earthen, concrete, etc. Depending on the condition of the soil, the efficiency of ventilation and the relative humidity of the air, basements are classified as damp and especially damp rooms, and according to the degree of danger of electric shock to people, they are especially dangerous. Therefore, increased requirements are placed on electrical wiring in basements.

Open wiring with unprotected wires directly on the grounds, on insulators and rollers should be carried out at a voltage of up to 42 V at a height of at least 2 m from the floor level, at a voltage above 42 V - at a height of at least 2,5 m.

The height of the open laying of protected insulated wires and cables in pipes from the floor level is not standardized.

For concealed wiring, it is forbidden to use steel pipes with a wall thickness of 2 mm or less.

The technology of mounting wires and cables directly on bases, on rollers, insulators and in pipes is described in the relevant sections.

Author: Bannikov E.A.

See other articles Section Electric installation work.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

SHARP Announces Millionth Contrast LCD Display 25.12.2005

Sharp has announced the development of an LCD display that it calls "mega-contrast". It has an absolutely incredible contrast ratio of 1000000:1 (a million to one).

Recall that in modern LCD monitors that can be bought in a store, the contrast ratio is about 1000:1 (sometimes less - 700:1), and the highest contrast display, which belongs to the professional category, has a ratio of 3000:1. True, SED, which is a joint venture between Canon and Toshiba, recently launched an LCD TV with a contrast ratio of 100000:1. The contrast of the "mega-contrast" display exceeds the theoretical limits for CRT, plasma and organic electroluminescent displays.

According to Sharp, this was achieved through the use of a combination of "unique" technologies developed by Sharp over the past few years. Moreover, Sharp emphasizes that the extremely high contrast ratio did not affect the power consumption of the display. It is as low as it should be for conventional LCD displays.

At first, Sharp is going to use its "mega-contrast" display in professional monitors for video engineers, who usually work in darkened rooms (where you can appreciate the "million" contrast). They will be released under the name Advanced Super View Premium LCD. But Sharp also has plans to enter the consumer market (when prices for "mega-contrast" monitors drop to an acceptable level).

Other technical characteristics of these LCD displays: diagonal - 37 inches, resolution - 1920x1080 pixels, brightness - 500 cd/m2.

Other interesting news:

▪ Lifestyle affects the future of offspring

▪ Buffaloes in Germany

▪ Powerful keys FSDM0365RN

▪ Purity of speech affects memory

▪ Coded information on the phone screen

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Life of remarkable physicists. Article selection

▪ article Typewriter. History of invention and production

▪ article What is malaria? Detailed answer

▪ European cow parsnip article. Legends, cultivation, methods of application

▪ article 160-meter collinear antenna. Encyclopedia of radio electronics and electrical engineering

▪ article Removing the vest from under the jacket. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews