Museum of Plugs and Sockets logo, small CEI 23-50 standard
Italian plugs and sockets
navigation icon navigation icon navigation icon


Comitato Elettrotecnico Italiano standard 23-50 plugs and sockets are used in Italy, Chile, Cuba, El Salvador, Ethiopia, Libya, Syria, Tunesia and Uruguay.
CEI 23-50 (first edition in 1995) has replaced the CEI 23-16 (1971) standard. Section VII relates to 10A and 16A plugs and sockets.
Type J profileRelated galleries:
uncommon types
heavy duty types


VIMAR CEI 23-50 socket, 10A CEI 23-50 socket for 10A and 16A plugs Contacts of Italian 10A / 16A socket Italian universal socket
  ↑     ↑    
Italian 10A and 16A connectors, CEI 23-50 Italian 10A and 16A plugs, CEI 23-50 BTicino corner plugs, 10A BTicino corner plugs, 10A

1 Classical example of a CEI 23-16 (now 23-50) standard 10A socket. The example shown is a VIMAR company, type SICURY socket. The Sicury shutter prevents accidental contact with live pins. Vimar was the first Italian company to offer this safety provision in 1968. Nowadays safety shutters are compulsory.
2 Socket that can accommodate both 10A and 16A plugs (see no. 6). The left hand outlet has quite common bipasso or bivalente (dual use) figure of eight shaped slots. The larger (5.1 mm) diameter 16A slots have a 26 mm spacing; the smaller (4.5 mm) 10A slots have a 19 mm spacing, which is also suitable for Europlugs. Brand name: BTicino.
3 The Bipasso type socket no. 2 allows separate wiring of the 10A and 16A outlets. They can be connected to respectively a 10A and 16A fuse in the main fuse box of the house. However, it is also possible to interconnect the two connector blocs. 
Note that Italian CEI 23-50 plugs and sockets are not polarized, because of the symmetrical arrangement of the slots
. That means that the position of brown (live) and blue (neutral) wires can be swapped.
4 'Universal' socket for Italian 10A and 16A plugs, as well as earthed Schuko type plugs. The diameter of the inner (10A) slots is larger than the 10A slots in sockets nos. 1 and 2, otherwise it would be impossible to insert a Schuko plug (pin diameter 4.8 mm; spacing 19 mm). This multi-purpose type of socket becomes increasingly popular in newly build premises in Italy. Brand name: BTicino.
5 Female 10A and 16A plugs. 16A models have 'dual use' shaped outlets. Brand name: Scame.
6 Italian 10A and 16A plug. It is compulsory that the basal part of power pins have an isolating sheath against accidental contact with live parts. Pin diameter of 10A plugs is 4.0 mm; 16A plugs have 5.0 mm pins. Brand name: Scame.
7, 8 Examples of two models of 10A plugs of which the pin position can easily be changed from top to side (compare top and bottom images). The thickness of both housings is only 15 mm. The disassembled model (see no. 8) shows the elegant simplicity of the design. These 'Corner' models are developed by the Italian BTicino company.



Italian multiplug for 10A, 16A and Schuko plugs
Obsolete Italian 16A socket without earth Bassani Ticino logo

9 Adapter for making 16A sockets also accessible to 10A plugs.
10 10A multi-plug with three 10A outlets. Brand name of multi-plug nos. 10 - 12: Scame.
11 16A multi-plug with four 'dual use' outlets.
12 3-way, 'triple use' multi-plug for Italian 10A and 16A plugs (top and side entries) and a Schuko plug (only top entry has earth clips). Although this multi-plug is meant for a 10A outlet, it also allows 16A plugs (either CEI 23-50 or Schuko). Schuko plugs cannot be inserted in the two side entries, because of insufficiently large diameter of those 10A slots.
13 Obsolete type 16A socket without earth, which dates back to the years between 1974 and 1989 (see no. 13a for details)
13a Socket no. 13 has been designed and produced by the Italian company Bassani Ticino, the precursor of BTicino.
The history of the company dates back to 1934 when the brothers Bassani founded 'Ticino Electric Switches'. In 1948 the company was renamed to Bassani SpA. In 1974 the name changed to Bassani Ticino (see logo of the 16A socket). In 1989 Bassani Ticino became a part of the French Legrand group and the name of the Italian division was shortened to BTicino.


Magic 16A plug, small
Uncommon plugs and sockets
The Italian company BTicino has developed
a series of 10A and 16A, polarized plugs and sockets.

Click here for details.

Heavy duty types
VIMAR has a single phase plug for 20A similar to the standard 16A type. For heavy duty purposes BTicino offers a polarized 10A three-phase type.

Click here for details.
Vimar 20A plug_small


Navigation icon

D i g i t a l   M u s e u m   o f

Navigation icon

P l u g s   a n d   S o c k e t s

Navigation icon