Reducing power losses in line due to a decrease of more than three times the reactance of isolated wires in comparison with non-isolated. 6. Hear other arguments on the topic with MetLife. Ease of installation work, the ability to connect new subscribers under stress, without shutting down the rest of the energy supply and as a consequence of shortening the repair and installation. 7. Significant reduction of unauthorized access to lines and cases of vandalism and theft.

8. Improving the overall aesthetics of urban environments and a significant reduction in cases of electric shock during installation, repair and operating line. 9. Possibility of laying on the facades of buildings CIP, as well as collaboration with the suspension cables of low, high-voltage lines of communication, which gives substantial savings on support. Among the many undoubted CIP can provide benefits for objectivity and some disadvantages: 1. A slight increase in cost (less than 1.2) insulated wires compared to conventional bare wires A and AS. The pioneers in the application of self-supporting insulated wires is considered to be France and Finland. Subsequently, other countries have developed their air suspension systems, but is usually taken as the basis of their already approved in the operation of the European standards.

In France, the first bundles of insulated wires overhead appeared in 1955 and was a copper conductor with rubber insulation with neoprene jacket. At first, they mounted on the facades of buildings, replacing the bare copper wire on insulators. In 1962, as isolation began to apply the PVC, which by 1977 had completely supplanted by light-stabilized polyethylene mesh structure.

Jigsaw – one of the most popular tools, which is appreciated by professionals and DIY for his versatile. In this article I will tell you the features and talk about the Jigsaw main selection criteria. Jigsaw (Jigsaw electric saw) – Hand tool with an electric drive, which has small dimensions and light weight. Jigsaw is designed for longitudinal, transverse and Shape cutting of various sheet materials. Jigsaw can perform the following tasks: straight cuts virtually any material (wood, sheet metal, plastic, laminate, drywall, ceramic tile, etc.), the curvilinear cut any material to make round holes of various diameters and rectangular openings. Benefits of Jigsaw for most repairs, carpentry and other similar work at home do not need to drink a large capacity, this work perfectly cope electrofret, Jigsaw can make high-quality curly cut material, working with different kinds of materials; indispensable tool for carving; professionals say Jigsaw versatility and ease of use. Jigsaw are professional and household: The household models have less power, working resource and, often, a smaller set of additional features. Jigsaw everyday you can usually cut wooden parts of a thickness of 70 mm, steel – up to 2-4 mm.

Requirements for household tool is not so high as to professional, so many well-known brands make this instrument is not in Germany and Czechoslovakia, as in China or Poland. Recommended total time of use of household is about Jigsaws twenty hours per month. Of course, domestic models have a lower cost than professional. For the professional tool imposed higher requirements, because it must withstand a heavy load, have performance and to be as convenient for work.