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- Plugs and sockets for electrical appliances not hardwired to mains electricity originated in the United Kingdom in the 1870s and were initially two-pin designs. These were usually sold as a mating pair, but gradually de facto and then official standards arose to enable the interchange of compatible devices. British standards have proliferated throughout large parts of the former British Empire. 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 a 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, with eight amendments up to 1999. BS 546 is also the precursor of current Indian and South African plug standards. The 5 A version has been designated as Type D and the 15 A as Type M in the IEC 60083 plugs and sockets standard. BS 546 plugs and sockets are still permitted in the UK, provided the socket has shutters.In the United Kingdom and in Ireland this system is usually referred to by its pin shape and is simply known as "round pin plugs" or "round pin sockets". It is often associated with obsolete wiring installations or where it is found in modern wiring, it is confined to special use cases, particularly for switch controlled lamps and stage lighting. BS 1363, 13 A plugs socket-outlets adaptors and connection units is a British Standard which specifies the most common type of single-phase AC power plugs and sockets that are used in the United Kingdom. Distinctive characteristics of the system are shutters on the neutral and line (see below) socket holes, and a fuse in the plug. It has been adopted in many former British colonies and protectorates. BS 1363 was introduced in 1947 as one of the new standards for electrical wiring in the United Kingdom used for post-war reconstruction. The plug and socket replaced the BS 546 plug and socket, which are still found in old installations or in special applications. BS 1363 plugs have been designated as Type G in the IEC 60083 plugs and sockets standard.In the United Kingdom and in Ireland, this system is usually referred to simply as a "13 amp plug" or a "13 amp socket". (en)
- Der Stecker-Typ D ist ein elektrischer Steckverbinder, der früher in Großbritannien üblich war und noch heute in Indien und Südafrika gebraucht wird. In Libyen ist er der einzige gebräuchliche Steckertyp, in zahlreichen weiteren Ländern ist er parallel zu anderen Steckern anzutreffen, wird dort jedoch – wie in Großbritannien schon geschehen – durch den Stecker-Typ G (BS 1363) abgelöst. Der Stecker-Typ D ist in Indien unter der Bezeichnung IA6A3 normiert. Der Stecker-Typ D wird in untereinander nicht kompatiblen Größen für 2 oder 5 Ampere gebaut, der 5-A-Stecker ist der gebräuchlichste. Dieser Stecker wird in der britischen BS 546 „5-A 3-pin“ genannt. Eine 5-A-Variante mit zwei Kontakten wird oft für Elektrorasierer in GB verwendet, jedoch meist nur mit 1 A abgesichert. Hier passt auch ein Eurostecker. (de)
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