Produce manufacture wiring accessories
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A wire is a single, usually cylindrical , flexible strand or rod of metal. Wires are used to bear mechanical loads or electricity and telecommunications signals. Wire is commonly formed by drawing the metal through a hole in a die or draw plate. Wire gauges come in various standard sizes, as expressed in terms of a gauge number. The term 'wire' is also used more loosely to refer to a bundle of such strands, as in "multistranded wire", which is more correctly termed a wire rope in mechanics, or a cable in electricity.
Wire comes in solid core, stranded, or braided forms. Although usually circular in cross-section, wire can be made in square, hexagonal, flattened rectangular, or other cross-sections, either for decorative purposes, or for technical purposes such as high-efficiency voice coils in loudspeakers. Edge-wound  coil springs , such as the Slinky toy, are made of special flattened wire.
In antiquity , jewelry often contains, in the form of chains and applied decoration, large amounts of wire that is accurately made and which must have been produced by some efficient, if not technically advanced, means. In some cases, strips cut from metal sheet were made into wire by pulling them through perforations in stone beads.
This causes the strips to fold round on themselves to form thin tubes. This strip drawing technique was in use in Egypt by the 2nd Dynasty. From the middle of the 2nd millennium BCE most of the gold wires in jewellery are characterised by seam lines that follow a spiral path along the wire.
Such twisted strips can be converted into solid round wires by rolling them between flat surfaces or the strip wire drawing method. The strip twist wire manufacturing method was superseded by drawing in the ancient Old World sometime between about the 8th and 10th centuries AD. Square and hexagonal wires were possibly made using a swaging technique. In this method a metal rod was struck between grooved metal blocks, or between a grooved punch and a grooved metal anvil.
Swaging is of great antiquity, possibly dating to the beginning of the 2nd millennium BCE in Egypt and in the Bronze and Iron Ages in Europe for torcs and fibulae. Twisted square-section wires are a very common filigree decoration in early Etruscan jewelry.
In about the middle of the 2nd millennium BCE, a new category of decorative tube was introduced which imitated a line of granules. True beaded wire, produced by mechanically distorting a round-section wire, appeared in the Eastern Mediterranean and Italy in the seventh century BCE, perhaps disseminated by the Phoenicians.
Beaded wire continued to be used in jewellery into modern times, although it largely fell out of favour in about the tenth century CE when two drawn round wires, twisted together to form what are termed 'ropes', provided a simpler-to-make alternative. A forerunner to beaded wire may be the notched strips and wires which first occur from around BCE in Anatolia.
Wire was drawn in England from the medieval period. The wire was used to make wool cards and pins, manufactured goods whose import was prohibited by Edward IV in Despite the existence of mills, the drawing of wire down to fine sizes continued to be done manually.
Wire is usually drawn of cylindrical form; but it may be made of any desired section by varying the outline of the holes in the draw-plate through which it is passed in the process of manufacture. The draw-plate or die is a piece of hard cast-iron or hard steel, or for fine work it may be a diamond or a ruby. The object of utilising precious stones is to enable the dies to be used for a considerable period without losing their size, and so producing wire of incorrect diameter.
Diamond dies must be rebored when they have lost their original diameter of hole, but metal dies are brought down to size again by hammering up the hole and then drifting it out to correct diameter with a punch. Wire has many uses. It forms the raw material of many important manufacturers , such as the wire netting industry, engineered springs, wire-cloth making and wire rope spinning, in which it occupies a place analogous to a textile fiber.
Wire-cloth of all degrees of strength and fineness of mesh is used for sifting and screening machinery, for draining paper pulp, for window screens, and for many other purposes. Vast quantities of aluminium , copper , nickel and steel wire are employed for telephone and data cables , and as conductors in electric power transmission , and heating.
It is in no less demand for fencing, and much is consumed in the construction of suspension bridges , and cages, etc.
In the manufacture of stringed musical instruments and scientific instruments, wire is again largely used. Pin and hairpin making; the needle and fish-hook industries; nail, peg, and rivet making; and carding machinery consume large amounts of wire as feedstock. Not all metals and metallic alloys possess the physical properties necessary to make useful wire. The metals must in the first place be ductile and strong in tension, the quality on which the utility of wire principally depends.
The principal metals suitable for wire, possessing almost equal ductility, are platinum , silver , iron , copper , aluminium, and gold ; and it is only from these and certain of their alloys with other metals, principally brass and bronze , that wire is prepared.
By careful treatment, extremely thin wire can be produced. Special purpose wire is however made from other metals e. Copper wires are also plated with other metals, such as tin, nickel, and silver to handle different temperatures, provide lubrication, and provide easier stripping of rubber insulation from copper.
Metallic wires are often used for the lower-pitched sound-producing "strings" in stringed instruments , such as violins , cellos , and guitars , and percussive string instruments such as pianos , dulcimers , dobros , and cimbaloms. To increase the mass per unit length and thus lower the pitch of the sound even further , the main wire may sometimes be helically wrapped with another, finer strand of wire.
Such musical strings are said to be "overspun"; the added wire may be circular in cross-section "round-wound" , or flattened before winding "flat-wound". Wire is often reduced to the desired diameter and properties by repeated drawing through progressively smaller dies, or traditionally holes in draw plates. After a number of passes the wire may be annealed to facilitate more drawing or, if it is a finished product, to maximise ductility and conductivity.
Electrical wires are usually covered with insulating materials , such as plastic, rubber-like polymers, or varnish. Insulating and jacketing of wires and cables is nowadays done by passing them through an extruder. Formerly, materials used for insulation included treated cloth or paper and various oil-based products. Since the mids, plastic and polymers exhibiting properties similar to rubber have predominated.
Two or more wires may be wrapped concentrically, separated by insulation, to form coaxial cable. The wire or cable may be further protected with substances like paraffin , some kind of preservative compound, bitumen, lead , aluminum sheathing, or steel taping. Stranding or covering machines wind material onto wire which passes through quickly. Some of the smallest machines for cotton covering have a large drum, which grips the wire and moves it through toothed gears; the wire passes through the centre of disks mounted above a long bed, and the disks carry each a number of bobbins varying from six to twelve or more in different machines.
A supply of covering material is wound on each bobbin, and the end is led on to the wire, which occupies a central position relatively to the bobbins; the latter being revolved at a suitable speed bodily with their disks, the cotton is consequently served on to the wire, winding in spiral fashion so as to overlap.
If many strands are required the disks are duplicated, so that as many as sixty spools may be carried, the second set of strands being laid over the first. For heavier cables that are used for electric light and power as well as submarine cables, the machines are somewhat different in construction.
The wire is still carried through a hollow shaft, but the bobbins or spools of covering material are set with their spindles at right angles to the axis of the wire, and they lie in a circular cage which rotates on rollers below. The various strands coming from the spools at various parts of the circumference of the cage all lead to a disk at the end of the hollow shaft.
This disk has perforations through which each of the strands pass, thence being immediately wrapped on the cable, which slides through a bearing at this point. Toothed gears having certain definite ratios are used to cause the winding drum for the cable and the cage for the spools to rotate at suitable relative speeds which do not vary. The cages are multiplied for stranding with many tapes or strands, so that a machine may have six bobbins on one cage and twelve on the other.
Solid wire, also called solid-core or single-strand wire, consists of one piece of metal wire. Solid wire is useful for wiring breadboards. Solid wire is cheaper to manufacture than stranded wire and is used where there is little need for flexibility in the wire.
Solid wire also provides mechanical ruggedness; and, because it has relatively less surface area which is exposed to attack by corrosives, protection against the environment.
Stranded wire is composed of a number of small wires bundled or wrapped together to form a larger conductor. Stranded wire is more flexible than solid wire of the same total cross-sectional area. Stranded wire is used when higher resistance to metal fatigue is required. Such situations include connections between circuit boards in multi-printed-circuit-board devices, where the rigidity of solid wire would produce too much stress as a result of movement during assembly or servicing; A.
At high frequencies, current travels near the surface of the wire because of the skin effect , resulting in increased power loss in the wire. Stranded wire might seem to reduce this effect, since the total surface area of the strands is greater than the surface area of the equivalent solid wire, but ordinary stranded wire does not reduce the skin effect because all the strands are short-circuited together and behave as a single conductor.
A stranded wire will have higher resistance than a solid wire of the same diameter because the cross-section of the stranded wire is not all copper; there are unavoidable gaps between the strands this is the circle packing problem for circles within a circle. A stranded wire with the same cross-section of conductor as a solid wire is said to have the same equivalent gauge and is always a larger diameter. However, for many high-frequency applications, proximity effect is more severe than skin effect, and in some limited cases, simple stranded wire can reduce proximity effect.
For better performance at high frequencies, litz wire , which has the individual strands insulated and twisted in special patterns, may be used. Prefused wire is stranded wire made up of strands that are heavily tinned , then fused together. Prefused wire has many of the properties of solid wire, except it is less likely to break.
A braided wire is composed of a number of small strands of wire braided together. Braided wires are often suitable as an electromagnetic shield in noise-reduction cables. The more individual wire strands in a wire bundle, the more flexible, kink-resistant, break-resistant, and stronger the wire becomes.
However, more strands increases manufacturing complexity and cost. For geometrical reasons , the lowest number of strands usually seen is 7: one in the middle, with 6 surrounding it in close contact. The next level up is 19, which is another layer of 12 strands on top of the 7. After that the number varies, but 37 and 49 are common, then in the 70 to range the number is no longer exact. Even larger numbers than that are typically found only in very large cables. For application where the wire moves, 19 is the lowest that should be used 7 should only be used in applications where the wire is placed and then does not move , and 49 is much better.
For applications with constant repeated movement, such as assembly robots and headphone wires, 70 to is mandatory. For applications that need even more flexibility, even more strands are used welding cables are the usual example, but also any application that needs to move wire in tight areas. The strands are organized by first creating a bundle of 7 strands. Then 7 of these bundles are put together into super bundles.
Finally super bundles are used to make the final cable. Each group of wires is wound in a helix so that when the wire is flexed, the part of a bundle that is stretched moves around the helix to a part that is compressed to allow the wire to have less stress. From Wikipedia, the free encyclopedia. For other uses, see Wire disambiguation. This article is about wire. For wiring in buildings, see electrical wiring.
Modular Electrical Switches Manufacturers in Mumbai
Established in , Anchor Electricals Pvt. Panasonic acquired Anchor, the year-old Indian family-owned electrical equipment brand, in It also sells home automation products from Panasonic. The company's new manufacturing unit has been built at Daman, India.
MK Electric is a company that makes electrical accessories. The company's headquarters are in Basildon , Essex , England , from where it sells goods worldwide. This was later renamed MK Electric. One product, the Multy Kontact spring grip socket 3-pin plug , soon became a market leader and the British Engineering Standards Association BESA changed standards to adopt this new product.
Ltd, another switchgear manufacturer. He progressed from draughtsman to works manager. John remained with Tuckers until the decision to set up his own manufacturing business in John created a 32 page catalogue of products that he was going to manufacture. John searched for suitable premises in the West Midlands, he found a disused leatherworks in Rushall Street Walsall. Once the premises were secured, he registered his business J. Manufacturing started in August and the workforce increased to include a team of production and assembly workers, 10 ladies in all. Initially a derelict music hall and disused church in the town, John Crabtree also rented an office in Lower Bridge Street to allow him the solitude to plan for the future. With the company well established within the electrical industry as a successful and innovative electrical manufacturer, John Crabtree was able to fulfill his ambitions and build his own premises. By this time the company employed staff and was a great asset to the people of Walsall, with Walsall Borough Council recognising the importance of the company.
The Home of Scolmore. Electronic Security and Fire Detection Products. Timeswitch Manufacturer Based in Scotland. Locking Connectors and Outlets.
Constant efforts in research and development enable us to provide innovative electrical accessories, thus delivering superior customer experience to a broader market through the development of exceptional team performance and world-class processes. Our years of experience allow us to be the leading brand of wall switches and trailing sockets in Malaysia. Cost control is achieved without compromising on quality by striving for production efficiency, safety and minimal wastage. Optimal utilization of resources through technological and managerial best practices allows LWD's customers to enjoy high quality products at low prices.
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Board Handling - Conveyors. Dongguan Kingsun Technology Co. Soldering Robots. Test Equipment. The key to the design is simplicity. Other polarity tester solutions on the market are not capable of testing for p
The modern domestic wiring solution
We have been fabricating electrical cables and wires to established high standards in our own plant since Some qualified employees are specially trained to manufacture a broad range of wires that satisfy the most stringent requirements. We offer our customers products to practically every standard and regulation. Our range is rounded out by special-purpose cables produced to customer requirements. It goes without saying that no product leaves our premises without having been tested.
United States. Committee on the Judiciary. Subcommittee on Antitrust and Monopoly , United States. Distribution of selected industries by size of value.
Electric Wiring Devices Suppliers
Vimal Wiring Devices has held a predominant position in the electrical field since from the time switches were simply power generating gadgets to the present day automated scenerio with a concept of modern lifestyle. The current trend being fast paced living laced with aesthetics bound inventiveness, has led us to learn more about our clients' evolved and emancipated attitudes and approaches in selecting from options. Vimal Wiring Devices designs, manufactures and supplies high quality switch products for electronic applications. Vimal Wiring Devices is a smart choice, delivering the most comprehensive range of solutions to meet the needs of customers.
Our pride in local engineering expertise made us rely on Sri Lanka's inherent talent to produce world-class electrical accessories. Harnessing this talent while gaining global recognition for electrical and manufacturing engineering expertise is somewhat of a pioneering concept. Our wiring devices come with a selection of designs to suite your architecture and aesthetic tastes whether it is contemporary, modern or classical, and a range of finishes that goes from standard to luxury. Orange Electric is the leading manufacturer of low voltage switch gears in Sri Lanka.
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NKT is a global company with manufacturing facilities in Europe which enable us to design, manufacture and market our high-quality products as well as push the boundaries of technological innovation in our field. Our manufacturing plants are among the most modern, flexible and cost-effective in the world, and we continuously invest in our manufacturing facilities to keep them at the highest technological level. Our state-of-the-art facility in Cologne, Germany is a unique example with specialized technical innovations which have been integrated into the factory to make the production as efficient as possible and our factory in Karlskrona, Sweden, is a center-of-excellence for production, installation and service of high voltage cables in both AC and DC for submarine and underground applications. All our production sites have their own testing facilities onsite, and especially our plant in Karlskrona offers some of the most advanced testing equipment in the industry. The factory has been constructed on the basis of facilitating optimal cable production and an optimum of environmental protection.
Cable manufacturing process in Demirer Kablo includes wire drawing, stranding, insulating, degassing, screening, lead sheathing if required, outer sheathing and testing. Wire drawing is the thinning process of copper and aluminium wires. A certain number of wires with a certain diameter are required to form the conductor and in order to obtain these wires, standard conductor rods are drawn.