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Plugs and sockets for electrical appliances not hardwired to mains electricity originated in Britain in the 1880s and were initially two-pin designs. These were usually sold as a mating pair, but gradually de facto and then official standards arose to enable the interchange of compatible devices. British standards have proliferated throughout large parts of the former British Empire.
Hubbell Incorporated designs, manufactures and sells electrical and electronic products for non-residential and residential construction, industrial and utility applications. Hubbell was founded by Harvey Hubbell as a proprietorship in 1888, and was incorporated in Connecticut in 1905. It is ranked 577 by the fortune group. The Company’s reporting segments consist of the Electrical segment and the Power segment. Hubbell’s manufacturing facilities are located in the United States, Canada, Switzerland, Puerto Rico, Mexico, the People's Republic of China ("China"), Italy, the United Kingdom, Brazil and Australia and maintains sales offices in Singapore, China, India, Mexico, South Korea, and countries in the Middle East. Hubbell was previously headquartered in Orange, Connecticut, and has now moved its headquarters to Shelton, Connecticut. Hubbell Inc. assisted Allied efforts during World War II by manufacturing military vehicle electrical circuits, battery-charging systems for M4 Sherman tanks, power jacks for test meters, vacuum tube sockets for radio communications, and a line of electrical and electronic connectors for aircraft. Hubbell Inc is in List of S&P 400 companies having stocks that are included in the S&P 400 stock market index, maintained by S&P Dow Jones Indices.
Plugs and sockets for portable appliances started becoming available in the 1880s. A proliferation of types developed to address the issues of convenience and protection from electric shock. Today there are approximately 20 types in common use around the world, and many obsolete socket types are still found in older buildings.
References
- ↑ "The History of MK". MK Electric. Retrieved 15 November 2010.
- ↑ Multy Kontact socket Archived 25 April 2012 at the Wayback Machine Retrieved 1 November 2011
- ↑ "MK Electric.com" . Retrieved 10 February 2017.
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