Main reference source – IEC World Plugs

The International Electrotechnical Commission (IEC) publishes a web microsite World Plugs¹ which provides the main source for this page, except where other sources are indicated. World Plugs includes some history, a description of plug types, and a list of countries giving the type(s) used and the mains voltage and frequency.

Although useful for quick reference, especially for travellers, IEC World Plugs may not be regarded as totally accurate, as illustrated by the examples in the plugs section below, and errors may exist.

Voltages

Voltages in this article are the nominal single-phase supply voltages, or split-phase supply voltages. Three-phase and industrial loads may have other voltages.

All voltages are root mean square (RMS) voltage; the peak AC voltage is greater by a factor of 2 {\displaystyle {\sqrt {2}}} , and the peak-to-peak voltage greater by a factor of 2 2 . {\displaystyle 2{\sqrt {2}}.}

Amperage

Countries with voltage around 120V uses 10 amp for regular use and 15 or 16 amp for high power applications (heaters, motors). Appliances may include batteries and/or super capacitors to compensate for the lack of outlets above 10 amp, or further increase amps on top of 15 or 16 amp outlet max output when they are available.² Due to the high cost of those appliances, applications that require high speed/high power at low cost are much less common in 120V countries (lack of electric kettles in North America).³

Countries with voltage around 240V uses 10 amp for regular use and 15 or 16 amp for high power applications (heaters, motors). However 15 and 16 amp outlets are much less common, as 10 amp at 240 volt is much higher power than even the high power (16 amp) outlets in 120V countries.

Plugs

Main article: AC power plugs and sockets

The system of plug types using a single letter (from A to O) used here is from World Plugs, which defines the plug type letters in terms of a general description, without making reference to specific standards. Where a plug does not have a specific letter code assigned to it, then it may be defined by the style sheet number listed in IEC TR 60083.⁴

Identification guide

Table of mains voltages, frequencies, and plugs

Notes

See also

• Delta-wye transformer
• Electrical wiring
• Electric power transmission
• Electrification
• Electrical grid
• List of railway electrification systems
• Mains electricity

External links

• Electrical systems travel guide from Wikivoyage
• Guide to Electrical Equipment for Travelers at Wikibooks

References

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5. "C" indicates that buildings have three-pin sockets compatible with Europlugs, which also work with other plug types, or that buildings have some or all two-pin European style sockets, similar to CEE 7/1. Not all two-pin European plugs are compatible with all two-pin European sockets; see AC power plugs and sockets § Comparison of standard types. /wiki/Europlug ↩

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