Museum of Plugs and Sockets logo, small CEE 7/7 and CEE 7/17 standard
Hybrid French - Schuko plugs
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CEE 7/7 and CEE 7/17 plugs fit in both Schuko (CEE 7/3) and French (CEE 7/5) sockets.
CEE 7/7 are earthed plugs, while CEE 7/17 are not earthed.

 

CEE7/7 plug CEE7/17 asymmatrical plug CEE7/17 symmatrical plug SCHUKOultra plug
       
CEE 7/3 socket CEE 7/5 socket Precursor model of a CEE 7/17 plug
former DDR 2-pin plug

1, 1a, 1b Plug with earth clips (Schuko) and a slot for earth pins of French sockets. Therefore the plug fits into both a Schuko socket (see no. 1a) and a French socket (see no. 1b). Earthed French-Schuko hybrid plugs are coded as CEE 7/7 plugs.
2 Not earthed plug with 4.8 mm pins, rated at 16A-250V. This CEE 7/17 plug fits into CEE 7/3 and 7/5 sockets. The plugs are often fixed to power cords of double insulated appliances that are rated up to 16A (hair dryers, hobby tools etc.).
Because of the asymmetrical base plate (only one circular hole) the plug can only be inserted in one orientation in a French (CEE 7/5) socket, which ensures that the polarity of French plugs is kept.
Note that
Europlugs, with 4.0 mm pins, can be used for appliances up to 2.5 A that do not require earthing
3 Symmetrical variant of plug no. 2, with two circular holes. It can be inserted in two different positions in a French socket and is therefore a not polarized plug.
4 SCHUKOultra plug, an extremely robust design made by ABL-SURSUM, Germany. Rating: 16A-250V. The hard plastic component of the housing can resist a weight of 4 tons. The plug has an IP code of 54, which means that neither dust or splashing water will have a harmful effect.
5 Plug that can be regarded as a precursor of CEE 7/17. The not earthed plug fits in CEE 7/3 sockets, but not in CEE 7/5 Rating: 6A - 250V; pins are partially split and have a diameter of 4 mm. The plugs is not rewirable, a feature comparable to CEE 7/17.
It has the same look as 1950s-60s Bakelite 2-pin plugs (see classic continental European plugs for examples), but the round base plate has a shape comparable to Schuko plugs. The plug has been made of a red melamine resin. It has no certification marks and no indication of the manufacturer.   {RH}

6 Two-pin, 10A plug that fits in Schuko and French sockets. The plug was used in former Eastern Germany (DDR) and dates back to the 1970s-80s. It had the same functionality as nowadays non-polarized CEE 7/17 plugs (see no. 3).
This type of plug was often used for export products. Therefore it has certification marks for Western European countries, as VDE (Germany), KEMA (Netherlands) and Scandinavian countries (D, S, FI). A DDR quality mark that was typical for home market products is missing. Brand name: Krania; now: Krania Kabel-Stecker GmbH, Kranichfeld, Thuringia, Germany.   {WM}

 

Rewirable CEE 7/17 plugs

Rewirable plugs are quite common for CEE 7/7, but a rewirable version of CEE 7/17 is not permitted in some European countries. For example in the Netherlands they are banned to prevent that a Schuko plug would be replaced by a non-earthed plug.


Rewirable CEE 7/17 plug made by Legrand
Rewirable CEE 7/17 plug made by Kaiser Asymmetrical rewirable CEE 7/17 plug Symmetrical rewirable CEE 7/17 plug

7 Asymmetrical CEE 7/17 rewirable plug, rated at 16A - 250V. The plug, made by Legrand, has a French (NF) and Polish (B) certification mark.
8 Symmetrical CEE 7/17 semi* rewirable plug. Rating: 16A - 250V. Plug has no VDE or other certification mark.
The synthetic rubber plug housing offers protection against ingression of water and dust according to IP44 grade.
Manufacturer: Martin Kaiser in Hochstadt am Main, Germany (company founded in 1939).
* semi means that the two parts of the plug are fixed with one-way screws; an example is shown bottom left. They cannot be removed by conventional tools because the screws can only be turned in one direction.
9 Asymmetrical, rewirable CEE 7/17 plug. See no. 2 for details about the meaning of having a asymmetrical pattern of notches. Pins have a diameter of 4.0 mm, rather than the standard CEE 7/17 size of 4.8 mm. The thinner pins explain a rating of 6A - 250V only, rather than 16A for standard CEE 7/17 plugs. Brand name EL-Bi, Istanbul,Turkey. The company was founded in 1987 under the name Elbistan Hirdavat (Elbistan Ironmongery). In 2013 EL-Bi became a member of the ABB Group. The plug has a Turkish certification mark (TSE).   {WM}
10 Symmetrical, rewirable plug, rated at 6A - 250V. The plug has 4.0 mm pins. Brand name unknown; possibly a Polish plug.  {WM}

 

CEE 7/7 and CEE 7/17 plugs in Europe

It is interesting to note that a large majority of Europeans are able to use CEE 7/7 as earthed plug and CEE 7/17 as non-earthed plug; see map below.
CEE 7/7 and CEE 7/17 have the potential to become the standard continental European plugs (Switzerland excluded).
However, it can only be an effective standard when restrictions on selling rewirable CEE 7/7 and CEE 7/17 (preferably
the asymmetrical variant) are lifted. Up to now in some European countries rewirable CEE 7/17 plugs are not yet allowed.

Note that 2.5A non-earthed Europlugs (CEE 7/16) are already accepted in each of the continental European countries.
Click here for another, more detailed map and table that show which of worldwide used domestic plugs can be used throughout Europe.
 
Map of Europe green Countries that have chosen for either the French or Schuko standard and thus accept CEE 7/7 and CEE 7/17 plugs.
In Eastern Europe you may find unearthed sockets that only accept plugs with 4.0 mm pins (former 6A-10A Soviet standard), rather than nowadays 4.8 mm pins for 16A plugs.
yellow In Italy some new houses, businesses and hotels are now equipped with universal sockets that both accept Italian, and CEE 7/7 (with functional earthing) and CEE 7/17 plugs. The popularity of universal sockets is rising. Italian CEI 23-50 sockets do not accept CEE 7/7 and CEE 7/17 plugs.
brown In Denmark DS Afsnit 107-2-D1 is the dominant standard. Danish sockets accept CEE 7/17 plugs. When CEE 7/7 plugs are used there is no earth connection. However, from 2008 CEE 7/5 (French type) sockets are allowed. Schuko is allowed from 2011, but both types are not yet common.
purple United Kingdom and Ireland have their own BS 1363 standard, which is incompatible with CEE 7/7 and CEE 7/17. An adapter is also needed to use CEE 7/16 (Europlugs).
red Switzerland has an unique standard, which is incompatible with CEE 7/7 and CEE 7/17. Also Liechtenstein has adopted the Swiss standard. Swiss sockets do accept Europlugs.

 


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