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Obsolete 125 V, 15 A / 250 V, 10 A duplex outlet. A patent for the obsolete "wye" American plug and socket was filed in 1915 under U.S. patent 1,179,728. [21] It predated the NEMA sockets and plugs. The plugs and sockets used in countries such as Argentina, Australia and China are based on this type and are physically compatible.
Electrical outlet, also referred to as a wall plate, outlet cover, or socket cover; Front panel, of computers; Head unit, stereo system component; Motherboard, input/output port panel such as on an ATX; Cover (container) Faceplate (housing), decorative elements of housing Nokia 5110, mobile phone with interchangeable faceplates
The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and tube wiring persisted since it allowed owners to wire a building for electricity at lower cost.
Three-prong plugs do not fit into the older, two-prong receptacles. [7] When used as intended, the ground pin of the 3-wire receptacle is to be connected to a grounded cover screw, or to an external ground. In 1969, Underwriters Laboratories mandated three-prong plugs on major appliances for safety. [7]
Bronze weapon from the Mesara Plain, Crete. Copper came into use in the Aegean area near the end of the predynastic age of Egypt about 3500 BC. The earliest known implement is a flat celt, which was found on a Neolithic house-floor in the central court of the palace of Knossos in Crete, and is regarded as an Egyptian product.
Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency.
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