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The Kaufmann Conference Center was designed by the Finnish architect Alvar Aalto for the architecture professor Edgar Kaufmann Jr..The conference hall is on the 12th floor of 809 United Nations Plaza, originally the headquarters of the Institute of International Education (IIE), at First Avenue and 45th Street in the Turtle Bay neighborhood of Manhattan in New York City. [1]
BS 546, Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors for AC (50–60 Hz) circuits up to 250 V is an older British Standard for three-pin AC power plugs and sockets. Originally published in April 1934, it was updated by a 1950 edition which is still current, [1] with eight amendments up to 1999. BS 546 is also the ...
When commercial electric power was first introduced in the 1880s, it was used primarily for lighting. Other portable appliances (such as vacuum cleaners, electric fans, smoothing irons, and curling-tong heaters) were connected to light-bulb sockets. As early as 1885 a two-pin plug and wall socket format was available on the British market.
U.S. patent 774,250.The first US power plug and socket dated 1904. Several early American electrical plug and socket arrangements were invented by Harvey Hubbell.On 26 February 1903 he filed two patent applications featuring 2-pin plugs and adaptors for using his plugs with existing designs of lamp sockets and wall receptacles.
An outlet is defined by the NEC as "a point in the wiring system at which current is taken to utilization equipment". [1] This definition includes receptacles, lighting, motors, etc. Ordinary switches control but do not consume electricity, and therefore are not defined as outlets in this sense.
Insulators must have a high electrical resistance, withstand high temperatures, and be easy to manufacture for a precise fit Electrodes in connectors are usually made of copper alloys, due to their good conductivity and malleability. [7]: 15 Alternatives include brass, phosphor bronze, and beryllium copper.