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For example, appliances may ensure that switches interrupt the line side of the circuit, or can connect the shell of a screw-base lampholder to neutral to reduce electric shock hazard. In some designs, polarised plugs cannot be mated with non-polarised sockets.
However, Labre's design is no more similar to the modern version than Knapp's earlier design. The German Schuko-system plug is believed to date from 1925 and is attributed to Albert Büttner. [12] As the need for safer installations became apparent, earthed three-contact systems were made mandatory in most industrial countries.
IEC 60906-1-plug. IEC 60906-1 (IEC designation "Type N") [1] is an international standard designed "to provide a standard for a safe, compact and practical 16 A 250 V AC system of plugs and socket-outlets that could be accepted by many countries as their national standard, even if not in the near future."
The term plug is in general and technical use in all forms of English, common alternatives being power plug, [3] electric plug, [4] and plug top. [5] The normal technical term for an AC power socket is socket-outlet, [6] but in non-technical common use a number of other terms are used.
The term plug is in general and technical use in all forms of English, common alternatives being power plug, [1] electric plug, [2] and (in the UK) plug top. [3] The normal technical term (in both British and International English) for an AC power socket is socket-outlet, [4] but in non-technical common use a number of other terms are used.
The plug pins are 4.8 by 19 mm (0.189 by 0.748 in). The Schuko connection system is symmetrical and unpolarised in its design, allowing line and neutral to be reversed. The socket also accepts Europlugs and CEE 7/17 plugs. It is rated at 16 A.
The right-hand column shows the design that prevailed and is in use today. Schuko (/ ˈ ʃ uː k oʊ /) is a plug/socket system used in much (but not all) of Europe. It is a registered trademark [1] referring to a system of AC power plugs and sockets that is defined as "CEE 7/3" (sockets) and "CEE 7/4" (plugs).
Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Wiring is subject to safety standards for design and installation.
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