Museum of Plugs and Sockets logo, small SEV 1011 standard
Swiss plugs and sockets
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Plugs and sockets according to standard 1011, defined by the Schweizerischer Elektrotechnischer Verein (SEV) are only used in Switzerland and Liechtenstein.
 Type J profile Related gallery:
heavy duty / 3-phase types


Swiss T13 socket Swiss T23 socket Swiss T13 connector plug Swiss T23 connector plug
Swiss T12 plug Swiss T23 plug Swiss T13 connectoe, inside
Swiss T13 corner plug

1, 5 Standard domestic, recessed socket, rated at 10A - 250V. Officially known as a type 13 socket (T13).
Image no. 5 shows the matching round pin plug (T12). The off-center position of the earth pin ensures that line and neutral can't be reversed. This T12 plug has partially insulated L and N pins. From 1 Jan. 2013 insulation is compulsory.
Manufacturers: socket: Feller AG in Horgen (ZH); plug: Tschudin & Heid in Waldenburg (BL).
2, 6 Socket and plug rated at 16A - 250V (T23). The rectangular pins prevents the use of T23 plugs in 10A sockets (T13, see no. 1), but 10A plugs (round pin T12, see no. 5) fit in T23 sockets. 16A plugs do not have partially insulated pins, because 16A sockets have always been recessed. Manufacturers:
socket: Amacher AG in Emmenbrück (LU), in 2014 taken over by Hager Industrie AG in Emmen (LU);

plug: WAROB, trademark of PWF Kunststofftechnik AG in Laupersdorf (SO).
10A, T13 connector plug for T12 plugs. See also no. 7. Manufacturer: Feller AG in Horgen (ZH).
4 16A, T23 connector plug for either T12 or T23 plugs. Manufacturer: Tschudin & Heid in Waldenburg (BL).
7 Although each of the three pins of T12 plugs have the same length, the earth pin makes contact first when a plug is inserted in a T13 socket or connector. The inside view of a T13 connector shows that the earth contact position is 5 mm in ahead of L and N contacts. The advanced position applies also to T23 sockets and connectors.
8 Simple model of a T12 plug with side cord entry. Manufacturer: Max Hauri AG, Bischofszell (TG).

Swiss Type 12 socket Swiss T12 socket with plug Swiss type 1 plug Comparison of Swiss Type 1 and Type 12 plugs
Swiss Ttpe 12 triple socket Swiss Type 12 multi-plug
Swiss T1 pluf, flat model

9, 10
T12, non-recessed socket rated at 10A - 250V. From 1 Jan. 2017 it is no longer allowed to sell or install non-recessed sockets, because there is a potential risk of a 230 Volt shock when the socket is used with a plug without partially insulated pins. Although plugs with partially insulated pins (see no. 5) are obligatory from 1 Jan. 2013, millions of older type of T12 plugs will remain in use for many years. Manufacturers: Electro-Mica AG in Mollis (socket no. 10) and Feller AG (socket no. 11 and plug).
11 Out of date Swiss T1 plug, rated at 10A-250V. From 1 January 2000 it is no longer allowed to sell or install type 1 plugs. Instead either 2.5A Europlugs (T26), or 10A 2-pin T11 plugs, or earthed, T12 plugs have to be used. The difference in shape between T12 and T1 plugs is shown in image no. 13.  Manufacturer: unknown company that used a logo with P and M (see logo k below).
12 Difference between a T12 and T1 plug. The rectangular shape of T1 plug No. 11 makes it impossible to use them in recessed (T13) sockets. T1 plugs can only be used in T12 sockets, which are gradually phased out.
Manufacturer of the white T12 plug: Tschudin & Heid.
13 Example of a round, unusual flat T1 plug with cord side entry. Rating 10A - 250V. The ASEV mark (top right) and absence of any other certification mark suggests that it is a Swiss made plug, The unknown company used a logo with a single H.
14 Triple T12 socket (three outlets for 10A plugs); an original and appealing Swiss design. However, because the outlets are non-recessed this type of triple socket will be taken off the market at the end of 2016. A triple T13 socket has to be the used instead. Manufacturer: Amacher AG in Emmenbrück (LU), Switzerland.
15 3-way T12 multi plug. Production of the model ended mid 1990s, because it had a serious safely problem. It is possible to insert only one pin of a T11 (nos. 11 and 12) or Europlug. Depending on the appliance attached to a flex cord, touching the other - free - pin may result in severe electric shock. The manufacturer of the multi-plug is not indicated.

Swiss T14 socket Swiss type 2 plug (obsolete) Comparison of Swiss T14 and French CEE 7/5 socket Swiss T14 adapter

Swiss type 12b plug.
Swiss type 12c plug.

16 Obsolete Swiss T14 socket, rated at 10A - 250V. Type 14 sockets were designed as a 'transition" model. It could be used with both old and new types of earthed plugs (see respectively images no. 17 and 5). Old and new differ with respect to their earth connection (either pin or slot). T14 sockets were taken off the market in 1974 (source: Hausinstallationsvorschriften des Schweizerischen Elektrotechnischen Vereins, 1985). Manufacturer: Feller AG.   {EA}
17 Obsolete Swiss type 2 plug rated at 10A - 250V. A tube, rather than pin, is used for earth connection; a feature comparable to French CEE 7/6 plugs (see image no. 18). The logo of an unknown manufacturer shows an M and W (see logo j below).   {EA}
18 Comparison of two types of sockets that both have pins for earth connection. Left: obsolete Swiss T14; right: modern French socket according to CEE 7/5 standard. The top view images show the difference in offset of the earth pin (13.4 mm for T14, versus 10.8 for CEE 7/5). The two systems are incompatible.
19 T12 adapter. The two outlets can be used for modern T12 plugs (see no. 5) and old type 2 plugs (see no. 17).
Manufacturer: F. Baillod S.A. in La Chaud-de-Fonds (NE)    {FS}
20, 21
T12b (no. 20) and T12c (no. 21) are special type 10A plugs, derived from older plug variants for different electricity tariffs, a system that no longer exists. Production of sockets of so-called flach-flach (T12b) and flach-rund (T12c) Nebertypen lasted till end 2012. Plugs are still available for replacement. The shown plugs have been ordered in 2016 by F. Baillod S.A..

Swiss classic type 1 plug
Swiss classic type 1 plug
Swiss classic type 1 plug made by Frankl & Kirschner

22 Classic, Bakelite T1 plug, rated at 6A - 250V. The plug, that has an older type ASEV certification mark, has been made for the Swiss company SOLIS, designer and manufacturer of domestic appliances. It is unknown which company has made the plug.  Dating: 1950s - '60s.   {WN}
23 Bakelite 6A - 250V plug. The round base plug design was very common in continental Europe from 1930s to 1970s. It has a Swiss ASEV certification mark and a manufacturer's logo with a B and an R, or B (see logo l below). It is unknown which company has used the logo. Dating: probably 1950s.   {WN}
24 Classic, Bakelite earthed plug with Swiss pin configuration, but made in Germany by Frankl und Kirchner in Mannheim. The plug has an unusual low rating of 2A - 250V. The German MPAD mark, indicating origin and type of Bakelite casts suggests that the plug dates back to the early 1950s. It does not have any certification mark.   {WN}

Marks and logos shown on Swiss plugs and sockets in the museum collection are depicted in images a - q.
Companies that simply used thier full name have been left out (i.e. Amacher, WAROB and Solis).

Eight logos have not yet been linked to a company. If you recognize a logo and know the name of the matching company, please contact me (see Home page for address).

Swiss SEV marks
Logos on Swiss plugs and sockets

The Association Suisse des Électriciens (ASE) / Schweizerischer Elektrotechnischer Verein (SEV), founded in 1889, is active on promotion and testing of function and safety of electrical installations and appliances. In 2002 the association has been renamed to Electrosuisse. Certification mark 'a' has been used by ASE/SEV. In 2002 mark 'b' has been introduced. Occasionally SEV conformity symbol 'c' can be found.
Feller AG. Classic AFH logo used by the company founded in 1909 by Adolf Feller in Horgen (ZH, Switzerland).
Feller AG. Modern logo used by the company that became in 1994 a part of Schneider Electric.
Tschudin & Heid in Waldenburg (BL). A link between Feller and Tschudin & Heid is likely; some plugs have both logo 'd' and 'f'.
Max Hauri AG, Bischofszell (TG).
F. Baillod S.A. in La Chaux-de-Fonds (NE, Switzerland). Logo on multi-plug no. 19 and on T12b and T12c plugs (nos. 20 and 21).
Logo of a unknown company. Logo has been found on T13 connector no. 7 and on T12 plug no. 10.
Logo of a unknown company. Logo has been found on T2 plug no. 17 and a T12 plug.
Logo of a unknown company. Logo has been found on T1 plug no. 11.
Logo of a unknown company. Logo has been found on classic plug no. 23.
Electro-Mica AG in Mollis (GL), a family owned company founded in 1931. Logo on T12 socket no. 9.
Logo of a unknown company. Logo has been found on a T12 plug.
A. Steffen AG in Spreitenbach (ZH). Company founded in 1963 by Alfred Steffen. Logo on a T14 socket, comparable to no. 16.
Electro-technical company Simon SA in Barcelona, Spain. Logo on T11 plug no. 11. Swiss type plugs have been used in Spain.
Frankl & Kirchner, Fabrik für Elektromotoren und elektrische Apparate in Mannheim, Germany (now Efka in Schwetzingen), on no. 24.

Besides the above shown single phase plugs and sockets there also exist models for three-phase 10A and 16A.
They are displayed in the wing on heavy duty and three-phase devices.
Click the plug at right if you like to switch to the other wing.
Swiss 10A 3-phase plug, small


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