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12-volt cigarette lighter receptacle and plug, size A. Receptacle inside diameter: 20.93–21.01 mm (median 20.97 mm) Plug body diameter: 20.73–20.88 mm (median 20.805 mm) Most often used in American automobiles; 12-volt cigarette lighter receptacle and plug, size B. Receptacle inside diameter: 21.41–21.51 mm (median 21.455 mm)
The same patent had a second design, with a wall attachable receptacle, capable of receiving the same plug, thus being the first socket and plug design patented in the US. Later in 1904, he changed the design to flat blades (a design later incorporated in the NEMA 2 series), filled under the U.S. patent 774,251 Both these patents were granted ...
Of those protocols listed, only RS-232 is single-ended with ground return, but it is a large signal, typically + and - 12V, all the others being differential. Differential signaling must use a balanced line to ensure that the signal does not radiate and that induced noise from a ground loop is a common-mode signal and can be removed at the ...
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.
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Many accessories for electrical installations (e.g., wall sockets, switches) sold in the UK are designed to fit into the mounting boxes defined in BS 4662:2006—Boxes for flush mounting of electrical accessories—Requirements, test methods and dimensions, with an 86 mm × 86 mm square face plate that is fixed to the rest of the enclosure by ...
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