page_title: CEE 7 standard AC plugs and sockets
section_title: CEE 7/1 unearthed socket and CEE 7/2 unearthed plug
hierarchical_section_title: CEE 7 standard AC plugs and sockets / CEE 7 standards / CEE 7/1 unearthed socket and CEE 7/2 unearthed plug
caption_attribution_description: English: Photo of two Schuko (CEE 7-3) socket-outlets manufactured by Busch-Jaeger Elektro GmbH, one has protective shutters, the other does not. Ελληνικά: Δύο μπρίζες (ρευματοδότες) σούκο (CEE 7-3) κατασκευασμένες από την Busch-Jaeger Elektro GmbH.
context_page_description: 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. The 2nd edition was published in 1963 and last updated in March 1983. It remains available from the IEC, but they state that "this standard shall not be used alone, it is to be used in addition to IEC 60884-1".
context_section_description: CEE 7/1 unearthed sockets are designed to accept CEE 7/2 round plugs without notches in the body and having 4.8 by 19 mm (0.189 by 0.748 in) pins.
  Because they have no earth connections they have been or are being phased out in most countries. The regulations of countries using the CEE 7/3 and CEE 7/5 socket standards vary in whether CEE 7/1 sockets are still permitted in environments where the need for earthing is less critical. Sweden, for example, prohibited them from new installations in 1994. In Germany unearthed sockets are rare, whereas in the Netherlands and Sweden it is still common to find them in "dry areas" such as in bedrooms or living rooms. Some countries prohibit use of unearthed and earthed sockets in the same room, in the "insulated room" concept, so that people cannot touch an earthed object and one that has become live, at the same time.
  The depth of the sockets varies between countries and age. Older sockets are so shallow that it is possible to touch the pins of a plug when the plug is inserted only deep enough to get electrical power on the pins, while newer sockets are deep enough to protect from this kind of accident. CEE 7/1 sockets accept CEE 7/4, CEE 7/6 and CEE 7/7 plugs without providing an earth connection. The earthed CEE 7/3 and CEE 7/5 sockets were specifically designed not to allow insertion of CEE 7/2 unearthed round plugs fitted to older appliances which had to be earthed via other means.
caption: Two Schuko (CEE 7-3) socket-outlets manufactured by Busch-Jaeger Elektro GmbH, the lower has (black) protective shutters, the upper does not, revealing internal metal contacts.
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