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An electrical insulator is a material in which the electron does not flow freely or the atom of the insulator have tightly bound electrons whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field. This contrasts with other materials, semiconductors and conductors, which conduct an electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors. The most common examples are non-metals.
Telecommunications in Saudi Arabia have evolved early in the Kingdom since the establishment the Directorate of Post, Telephone and Telegraph (PTT) in 1926.
Electrical wiring in North America follows regulations and standards for installation of building wiring which ultimately provides mains electricity.
Leviton Manufacturing Company, Inc. is an American manufacturer of electrical wiring equipment in North America. It produces electrical light sockets, receptacles and outlets, switches, dimmers and other lighting control systems, wire, power cables, power cords, wall and ceiling occupancy sensors, wall plates, datacom, and other electrical products.
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British Electric Traction Company Limited, renamed BET plc in 1985, was a large British industrial conglomerate. It was once a constituent of the FTSE 100 Index but was acquired by Rentokil in 1996, and the merged company is now known as Rentokil Initial.
Energis Communications Limited, briefly Telecom Electric, or more usually just Energis, was a 'technology driven communications company' based in the United Kingdom and Ireland. The company was once a constituent of the FTSE 100 Index, but subsequently went into administration, and then became a subsidiary of Cable & Wireless, in turn acquired by Vodafone.
Standard Telephones and Cables Ltd was a British manufacturer of telephone, telegraph, radio, telecommunications, and related equipment. During its history, STC invented and developed several groundbreaking new technologies including pulse-code modulation (PCM) and optical fibres.
The Belling-Lee connector is commonly used in Europe and Australia to connect coaxial cables with each other and with terrestrial VHF/UHF roof antennas, antenna signal amplifiers, CATV distribution equipment, TV sets, and FM and DAB radio receivers. In these countries, it is known colloquially as a PAL antenna connector, IEC antenna connector, or simply as a TV aerial plug. It is one of the oldest coaxial connectors still commonly used in consumer devices. For television signals, the convention is that the source has a male connector and the receptor has a female connector. For FM radio signals, the convention is that the source has a female connector and the receptor has a male connector. This is more or less universally adopted with TV signals, while it's not uncommon for FM radio receivers to deviate from this, especially FM radio receivers from companies not based in the areas that use this kind of connector.
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Brimsdown Industrial Estate is located to the east of the residential part of Brimsdown in the London Borough of Enfield. The estate, which lies in the Lea Valley, is bordered to the west by the West Anglia Main Line portion of the Lea Valley Lines and to the east by the River Lea and King George V Reservoir. A number of businesses are located here including Warburtons Enfield bakery, warehousing and retail, and heavier industry such as Johnson Matthey, UOP and the Enfield Power Station.
Sumitomo Electric Industries, Ltd. is a manufacturer of electric wire and optical fiber cables. Its headquarters are in Chūō-ku, Osaka, Japan. The company's shares are listed in the first section of the Tokyo, Nagoya Stock Exchanges, and the Fukuoka Stock Exchange. In the period ending March 2019, the company reported consolidated sales of US$29 billion.
British Insulated Callender's Cables (BICC) was a 20th-century British cable manufacturer and construction company, now renamed after its former subsidiary Balfour Beatty. It was formed from the merger of two long established cable firms, Callender's Cable & Construction Company and British Insulated Cables.
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Porter-Cable is an American company that manufactures power tools. Known for pioneering the portable belt sander, helical-drive circular saw, and portable band saw, it is a subsidiary of Stanley Black & Decker.
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Fujikura Ltd. is a global, Tokyo-based electrical equipment manufacturing company, developing and manufacturing power and telecommunication systems products, including devices for optical fibers, such as cutters and splicers.
Furukawa Electric Co., Ltd. is a Japanese electric and electronics equipment company.
The British and Irish Magnetic Telegraph Company was founded by John Brett in 1850. The Magnetic was the principal competitor to the largest telegraph company in the United Kingdom, the Electric Telegraph Company. The Magnetic was the leading company in Ireland, while the Electric was the leading company in mainland Britain. Between them, they dominated the market until the telegraph was nationalised in 1870.
Enfield Rolling Mills was a British manufacturer of non-ferrous metals.
References
- ↑ "The Monopolies and Mergers Commission,Insulated Electric Wires and Cables: A Report on the Supply in the United Kingdom and the Export from the United Kingdom of Insulated Electric Wires and Cables, Chapter 3 - AEI, Delta and Pirelli General" (PDF). Archived from the original (PDF) on 2007-10-25. Retrieved 2007-10-16.
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