Editing AC power plugs and sockets (section)

=== Swiss SN 441011 (Type J) ===
{{Main|SN 441011}}
[[File:J plug - 1.jpg|thumb|Type J: The 10&nbsp;ampere ''SN&nbsp;441011 type&nbsp;13'' socket (here: a triple socket) and ''type&nbsp;12'' plug]]
[[File:SEV 1011 Swiss System Plugs and Sockets.jpg|thumb|SN&nbsp;441011, overview of the hierarchical Swiss system]]

The Swiss standard, also used in [[Liechtenstein]] and [[Rwanda]]<ref name=iec_typej/> (and in other countries alongside other standards) is ''SN&nbsp;441011'' (until 2019 ''SN&nbsp;SEV&nbsp;1011) Plugs and socket-outlets for household and similar purposes''.<ref name=SEV1011>{{cite web |url=http://www.electrosuisse.ch/de/meta/shop/normen/detail.html?tx_kidsshop_product%5Bproduct%5D=122100008085493 |title=SEV 1011:2009, Plugs and socket-outlets for household and similar purposes |publisher=Electrosuisse, SEV Verband für Elektro-, Energie- und Informationstechnik |year=2009 |format=PDF |type=official site |location=Fehraltorf, Switzerland |access-date=26 May 2017 |url-access=subscription}}</ref> The standard defines a hierarchical system of plugs and sockets with two, three and five pins, and 10&nbsp;A or 16&nbsp;A ratings. Sockets will accept plugs with the same or fewer pins and the same or lower ratings.<ref name=SystemSEV1011>{{cite web |url=http://www.esti.admin.ch/en/dokumentation_electrical_products.htm |title=Information SEV 1011 – power socket/plug/connector |publisher=Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation |date=1 August 2011 |format=PDF |type=official site |location=Fehraltorf, Switzerland |access-date=26 May 2017 |archive-url=https://web.archive.org/web/20170513140400/http://www.esti.admin.ch/en/dokumentation_electrical_products.htm |archive-date=13 May 2017 |url-status=dead}}</ref> The standard also includes three-phase devices rated at 250&nbsp;V (phase-to-neutral) / 440&nbsp;V (phase-to-phase).<ref>SN''&nbsp;''441011 dated 1 March 2022</ref> It does not require the use of child protective shutters. The standard was first described in 1959.

==== 10&nbsp;A plugs and sockets (Type J) ====
SN 441011 defines a "Type 1x" series of 10&nbsp;A plugs and sockets. The type&nbsp;11 plug is unearthed, with two 4&nbsp;mm diameter round pins spaced 19&nbsp;mm apart. The type&nbsp;12 plug adds a central 4&nbsp;mm diameter round earth pin, offset by 5&nbsp;mm. The type&nbsp;12 socket has no recess, while the type&nbsp;13 socket is recessed. Both sockets will accept type&nbsp;11 and type&nbsp;12 plugs, and also the 2.5&nbsp;A [[Europlug]]. Earlier type&nbsp;11 and 12 plugs had live and neutral pins without sleeved pins, which present a [[Electric shock|shock]] hazard when partially inserted into non-recessed sockets. The IEC type&nbsp;J designation refers to SEV&nbsp;1011's type&nbsp;12 plugs and type&nbsp;13 sockets.<ref name=iec_typej>{{cite web |url=http://www.iec.ch/worldplugs/typeJ.htm |title=Plug Type J |publisher=International Electrotechnichal Commission IEC |type=official site |location=Geneva, Switzerland |access-date=26 May 2017 |quote=Type C plugs are perfectly compatible with Type&nbsp;J sockets. |archive-date=13 March 2018 |archive-url=https://web.archive.org/web/20180313031639/http://www.iec.ch/worldplugs/typeJ.htm |url-status=dead}}</ref>

Unique to Switzerland is a three-phase power socket compatible with single-phase plugs:<ref name=SystemSEV1011/> The type&nbsp;15 plug has three round pins, of the same dimensions as type&nbsp;12, plus two smaller flat rectangular pins for two additional power phases. The type&nbsp;15 socket is recessed, and has five openings (three round and two flat rectangular). It will accept plugs of types&nbsp;11, 12, 15 and the Europlug.

==== 16&nbsp;A plugs and sockets ====
SN&nbsp;441011 also defines a "Type 2x" series of 16&nbsp;A plugs and sockets. These are the same as their 10&nbsp;A "Type 1x" counterparts, but replace the round pins with 4&nbsp;mm × 5&nbsp;mm rectangular pins. The sockets will accept "Type 1x" plugs. The unearthed type 21 plug has two rectangular pins, with centres 19&nbsp;mm apart. The type&nbsp;23 plug adds a central rectangular earth pin, offset by 5&nbsp;mm. The recessed type&nbsp;23 socket will accept plugs of types&nbsp;11, 12, 21, 23 and the Europlug.

Again, the three-phase power socket is compatible with single-phase plugs, either of 10&nbsp;A or 16&nbsp;A ratings:<ref name=SystemSEV1011/> The type&nbsp;25 plug has three rectangular pins of the same dimensions as type&nbsp;23, plus two rectangular pins of the same dimensions as type&nbsp;15. The corresponding type&nbsp;25 socket is recessed and will accept plugs of types&nbsp;11, 12, 15, 21, 23, 25 and the Europlug.

==== Regulation of adaptors and extensions ====
A 2012 appendix to SEV&nbsp;1011:2009, ''SN&nbsp;SEV&nbsp;1011:2009/A1:2012 Plugs and socket-outlets for household and similar purposes – A1: Multiway and intermediate adaptors, cord sets, cord extension sets, travel adaptors and fixed adaptors''<ref name=SEV1011A1>{{cite web |url=http://www.electrosuisse.ch/de/meta/shop/normen/detail.html?tx_kidsshop_product%5Bproduct%5D=122100008856715 |title=SEV 1011:2009/A1:2012, Plugs and socket-outlets for {{sic|houshold|nolink=y}} and similar purposes – A1: Multiway and intermediate adaptors, cord sets, cord extension sets, travel adaptors and fixed adaptors |publisher=Electrosuisse, SEV Verband für Elektro-, Energie- und Informationstechnik |year=2012 |format=PDF |location=Fehraltorf, Switzerland |access-date=26 May 2017 |url-access=subscription}}</ref> defines the requirements applicable to multiway and intermediate adaptors, cord sets, cord extension sets, and travel and fixed adaptors, it covers the electrical safety and user requirements, including the prohibition of stacking (the connection of one adaptor to another). Non-conforming products must be withdrawn from the Swiss market before the end of 2018.<ref>{{cite web |url=http://www.esti.admin.ch/files/aktuell/2013_03_stecker_steckdosen_e.pdf |title=Plugs and socket-outlets for household use and related purposes: New product requirements for the Swiss market |author=Dario Marti, Director |publisher=Federal Inspectorate for Heavy Current Installations ESTI, Swiss Confederation |date=March 2013 |type=official site |location=Fehraltorf, Switzerland |access-date=26 May 2017 |archive-url=https://web.archive.org/web/20140903134853/http://www.esti.admin.ch/files/aktuell/2013_03_stecker_steckdosen_e.pdf |archive-date=3 September 2014 |url-status=dead}}</ref>

==== Pictures ====
{|
|- valign=top
|
{| class=wikitable style=text-align:center
|+ Plug forms from SN 441011
|-
!
! Single-phase, unearthed
! Single-phase, earthed
! Three-phase, earthed
|-
! 2.5 A
| [[File:Euro-Flachstecker 2.jpg|rahmenlos|104x104px]]<br />[[Europlug]]
|
|
|-
! 10 A
| [[File:SN 441011 Typ 11 L+N Stecker.png|rahmenlos|104x104px]]<br />Type 11
| [[File:SEV 1011 2009 Typ 12 L+N+PE Stecker.jpg|rahmenlos|104x104px]]<br />Type 12
| [[File:SEV 1011 Type 15 plug.jpg|rahmenlos|104x104px]]<br />Type 15
|-
! 16 A
| Type 21
| [[File:SEV 1011 Type 23 plug.jpg|rahmenlos|104x104px]]<br />Type 23
| [[File:SEV 1011 Type 25 plug.jpg|rahmenlos|104x104px]]<br />Type 25
|}
|
{| class="wikitable style"="text-align:center"
|+ Socket forms from SN 441011
|-
!
! Single-phase, earthed
! Three-phase, earthed
|-
! 10 A
| [[File:SEV 1011 Typ 13 Steckdose einfach.jpg|rahmenlos|140x140px]]<br />Type 13
| [[File:SEV 1011 Typ 15 Steckdose.jpg|rahmenlos|140x140px]]<br />Type 15
|-
! 16 A
| [[File:SEV 1011 single Type 23 wall socket.jpg|rahmenlos|140x140px]]<br />Type 23
| [[File:SEV 1011 Typ 25 Steckdose.jpg|rahmenlos|140x140px]]<br />Type 25
|}
|
<gallery center mode=packed heights=140 caption="Other Swiss socket forms">
SEV 1011 Typ 12 Steckdose.jpg|Type 12 triple socket (10&nbsp;A), now obsolete and no longer sold or installed
SEV 1011 Typ 14 Stecker.jpg|Type 14 single socket (10&nbsp;A), now obsolete
SEV 1011 Typ 13 Steckdose.jpg|Type 13 triple socket (10&nbsp;A)
SEV 1011 Typ 23 Steckdose.jpg|Type 23 triple socket (16&nbsp;A)
</gallery>
|}
{{clear}}
{{anchor|Thai Industrial Standard 166-2549}}