Editing AC power plugs and sockets (section)

=== Danish plug (Type K)<span class="anchor" id="Type K"></span> ===
[[File:107-2-D1 - Danish electrical plugs - Studio 2011.jpg|thumb|upright|Danish 107-2-D1, standard DK 2-1a, with round power pins and a half-round earth pin]]

This [[Denmark|Danish]] standard plug is described in the Danish Plug Equipment Section 107-2-D1 Standard sheet (SRAF1962/DB&nbsp;16/87&nbsp;DN10A-R). Like in most European plugs, the power pins of Danish plugs are {{convert|19|mm|in|abbr=on}} long and spaced {{convert|19|mm|in|abbr=on}} apart, with a diameter of {{convert|4.8|mm|in|abbr=on}}. The earthing pin is part of the plug (in contrast to French and Schuko plugs); it is D-shaped, {{convert|14|mm|in|abbr=on}} long, and offset from the power pins by {{convert|13|mm|in|abbr=on}}. It is {{convert|4|mm|in|abbr=on}} thick with a diameter of {{convert|6.5|mm|in|abbr=on}}. Sockets and plugs are rated for 16{{nbsp}}A.<ref>{{cite web |title=Power plug & outlet Type K |url=https://www.worldstandards.eu/electricity/plugs-and-sockets/k/ |website=WorldStandards.eu |access-date=18 February 2025 |date=4 January 2025}}</ref> The Danish standard provides for sockets to have child-resistant shutters. Sockets are polarised in the same way as British ones: if earth is at the bottom, live is at the left of the socket.<ref>{{cite web |title=Mains Line Plugs, 210A Series Type 186 – Specifications |url=https://www.bpro-solutions.com/partnerportal/EU/en/p/000000000000107592/downloadDocument?documentCode=0000000000000001000366942&application=PDF |website=B.Pro Solutions |format=PDF |access-date=21 March 2025}}</ref><ref>{{cite web |title=Classic Danish types |url=https://www.plugsocketmuseum.nl/Danish3.html |website=Museum of Plugs and Sockets |access-date=21 March 2025}}</ref>

Europlugs (CEE&nbsp;7/16) can be safely used with Danish sockets. Physically the sockets also accept earthed CEE&nbsp;7/4 (Schuko), CEE&nbsp;7/6 (French), and CEE&nbsp;7/7 (Schuko-French hybrid) plugs, but no earth connection will be established.

[[File:Gniazdo el z przelacznikiem (ubt).JPG|thumb|left|upright=.55|Old Danish unearthed and switched socket]]

Traditionally all Danish sockets were equipped with a switch to prevent touching live pins when connecting/disconnecting the plug. Today, sockets without switch are allowed, but they must be recessed to prevent touching the live pins. Since the early 1990s earthed sockets have been required in all new electric installations in Denmark. Older sockets need not be earthed, but all sockets, including old installations, must be protected by [[Residual-current device|earth-fault interrupters]] (HFI or HPFI in Danish) by 1 July 2008.

[[File:DanishComputerPlugSocket-DK-2-5a.png|thumb|upright|Socket for the tilted flattened pins and half-round earth pin of a Danish computer plug]]

Since 1 July 2008, French-style CEE&nbsp;7/5 sockets may also be installed in Denmark.<ref>{{Citation |place=DK |language=da |url=http://www.sik.dk/Professionelle/El-branchen/Love_og_regler/index.aspx?id=b7f014a1-4b6b-4173-95e5-82efb87bcebf |publisher=Sik |title=5. udgave af Stærkstrømsbekendtgørelsen afsnit 107-2-D1 "Stikpropper og stikkontakter for danske systemer" |url-status=dead |archive-url=https://web.archive.org/web/20081207093431/http://www.sik.dk/Professionelle/El-branchen/Love_og_regler/index.aspx?id=b7f014a1-4b6b-4173-95e5-82efb87bcebf |archive-date=7 December 2008}}</ref><ref>{{cite web |last=Mølsted |first=Henning |date=12 September 2006 |title=Slut med dansk monopol på stikkontakter |url=https://ing.dk/artikel/slut-med-dansk-monopol-pa-stikkontakter-70837 |access-date=2 December 2022 |website=[[Ingeniøren]] |language=da}}</ref> Since 15 November 2011, CEE&nbsp;7/3 (Schuko) sockets may be installed as well,<ref>{{Citation |place=DK |language=da |url=https://www.retsinformation.dk/Forms/R0710.aspx?id=139163 |publisher=Retsinformation |title=BEK nr 1041 af 10/11/2011: Bekendtgørelse om stærkstrømsbekendtgørelsen, afsnit&nbsp;6C, særlige krav til anvendelse af stikpropper og stikkontakter i installationer}}</ref> but Type K remains by far the most common socket in Danish homes as of January 2024. French and Schuko sockets were allowed because little electrical equipment sold to private users is equipped with a Danish plug. In Europe, devices are usually sold with the Europlug CEE&nbsp;7/16 and hybrid plug CEE&nbsp;7/7, as these fit in most countries. However, in Denmark this often leads to the situation that the protective earth is not connected.<ref name="worldstandards.eu">{{cite web |url=https://www.worldstandards.eu/electricity/plug-voltage-by-country/denmark/ |title=Power plug, socket & mains voltage in Denmark |language=en |date=5 January 2025 |access-date=21 February 2025 |website=WorldStandards.eu}}</ref> Newssites and industry magazines have warned that, due to the lack of grounding, plugging a hybrid (or French or Schuko) plug directly into a Type K socket can give noticeable electric shocks to the point of pain,<ref name="worldstandards.eu"/><ref>{{cite web |url=https://ing.dk/artikel/kronik-danske-stikkontakter-er-en-dyr-tikkende-bombe |title=Kronik: Danske stikkontakter er en dyr tikkende bombe |language=da |access-date=3 January 2024 |date=8 May 2014 |publisher=ING.dk}}</ref> be dangerous to the point of hospitalizing,<ref>{{cite web |url=https://www.sik.dk/erhverv/elinstallationer-og-elanlaeg/vejledninger/ulykker/hvad-sker-der-kroppen-ved-elulykker|title=Hvad sker der med kroppen ved elulykker? |language=da |access-date=3 January 2024 |publisher=Sikkerhedsstyrelsen |quote=''En kvinde fik stød af en defekt kaffemaskine. Kaffemaskinen var monteret med Schuko-stikprop, men installationen var beskyttet med fejlstrømsafbryder, som slog fra. Kvinden var indlagt i et døgn.''}}</ref> or even be life-threatening.<ref>{{cite web |url=https://www.avisen.dk/pas-paa-hvidevare-stik-er-livsfarlige_182036.aspx |title=Pas på - hvidevare-stik er livsfarlige |language=da |access-date=3 January 2024 |date=25 August 2012 |publisher=Avisen.dk}}</ref><ref>{{cite web |url=https://ing.dk/artikel/spoerg-scientariet-hvorfor-giver-min-roeremaskine-stoed |title=Spørg Scientariet: Hvorfor giver min røremaskine stød? |language=da |access-date=3 January 2024 |date=24 February 2018 |publisher=ING.dk}}</ref><ref>{{cite web |url=https://taenk.dk/forbrugerliv/bolig/haarde-hvidevarer-maa-du-selv-tilslutte |title=Hårde hvidevarer: Må du selv tilslutte? |language=da |access-date=3 January 2024 |date=13 February 2020 |publisher=Forbrugerrådet Tænk}}</ref><ref>{{cite web |url=https://samvirke.dk/artikler/tilslut-jordforbindelsen-paa-dine-elektriske-apparater-og-undgaa-stoed-og-kortslutning |title=Tilslut jordforbindelsen på dine elektriske apparater og undgå stød og kortslutning |language=da |access-date=3 January 2024 |date=29 April 2019 |publisher=Samvirke.dk}}</ref>

A variation (standard DK&nbsp;2-5a) of the Danish plug is for use only on surge protected computer sockets. It fits into the corresponding computer socket and the normal socket, but normal plugs deliberately do not fit into the special computer socket. The plug is often used in companies, but rarely in private homes. There is another variation for hospital equipment with a rectangular left pin, which is used for life support equipment.
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