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The system of plug types using a single letter (from A to O) used here is from World Plugs, which defines the plug type letters in terms of a general description, without making reference to specific standards. Where a plug does not have a specific letter code assigned to it, then it may be defined by the style sheet number listed in IEC TR 60083.
Like in most European plugs, the power pins of Danish plugs are 19 mm (0.75 in) long and spaced 19 mm (0.75 in) apart, with a diameter of 4.8 mm (0.19 in). The earthing pin is part of the plug (in contrast to French and Schuko plugs); it is D-shaped, 14 mm (0.55 in) long, and offset from the power pins by 13 mm (0.51 in).
A passive electric power adapter, sometimes called a travel plug or travel adapter, allows using a plug from one region with a foreign socket. As other countries supply 120-volt, 60 Hz AC, using a travel adapter in a country with a different supply poses a safety hazard if the connected device does not support both input voltages.
In her 1914 book Electric cooking, heating, cleaning, etc. [10] Maud Lucas Lancaster mentions an earthed iron-clad plug and socket by the English firm of Reyrolle and Co. The earliest American patent application for an earthed plug appears to be 11 January 1915 by George P. Knapp, on behalf of the Harvey Hubbell company.
An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.
AC power plugs are also commonly circular, for example, Schuko plugs and IEC 60309. NMEA 2000 cabling using M12 connectors The M12 connector , specified in IEC 61076-2-101, is a circular electrical plug/receptacle pair with 12mm OD mating threads, used in NMEA 2000 , DeviceNet , IO-Link , some kinds of Industrial Ethernet , etc. [ 16 ] [ 17 ]
In North America, the National Electrical Manufacturers Association develops standards for electrical plugs and receptacles and cables. [2] International power cords and plug adapters are used in conjunction with electrical appliances in countries different from those in which they were designed to operate.
AC power plugs and sockets; Mains electricity by country; Talk:AC power plugs and sockets/Archive 4; Talk:AC power plugs and sockets/Archive 6; Talk:Mains electricity by country/Archive 1; Talk:Mains electricity by country/Archive 3
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