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50 Hz Bahamas: A, B 120 V 208 V 60 Hz Bahrain: G 230 V 400 V 50 Hz Bangladesh: A, C, D, G 220 V 380 V 50 Hz Barbados: A, B 115 V 200 V 50 Hz Belarus: C, F 230 V [11] 400 V 50 Hz Belgium: C, E NBN C 61 112-1: 230 V 400 V 50 Hz Belize: A, B, G 110 V 220 V 190 V 380 V 60 Hz Benin: C, E 220 V 380 V 50 Hz Bermuda: A, B 120 V
CEE 7 is a standard for alternating-current plugs and sockets.First published in 1951 by the former International Commission on the Rules for the Approval of Electrical Equipment (), it unified standards produced by several continental European countries.
An adaptor (in the context of plugs and sockets) is defined in IEC 60050 as "a portable accessory constructed as an integral unit incorporating both a plug portion and one or more socket-outlet portions". (There is an alternative spelling, 'adapter', but adaptor is the form usually used in standards and official documents.)
An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics because of their safety; the hazardous 120 or 240 volt main current is transformed down to a ...
Physical compatibility does not ensure that the appliance and socket match in frequency or voltage. Adaptors allow travellers to connect devices to foreign sockets, but do not change voltage or frequency. A voltage converter is required for electrical compatibility in places with a different voltage than the device is designed for. Mismatch in ...
The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user.
A 50 Hz ±5 Hz vibrating-reed mains frequency meter for 220 V. The world's first public electricity supply was a water wheel driven system constructed in the small English town of Godalming in 1881. It was an alternating current (AC) system using a Siemens alternator supplying power for both street lights and consumers at two voltages, 250 V ...
IEC 60309 (formerly IEC 309 and CEE 17, also published by CENELEC as EN 60309) is a series of international standards from the International Electrotechnical Commission (IEC) for "plugs, socket-outlets and couplers for industrial purposes".
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