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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.
Example of a Europlug. The Europlug is a flat, non-rewirable two-pole, round-pin domestic AC power plug, rated for voltages up to 250 V and currents up to 2.5 A. [1] It is a compromise design intended to connect low-power Class II appliances safely to the many different forms of round-pin domestic power socket used across Europe.
Both, the map showing the plug types in use and the map showing the mains frequencies and voltages have been created to exceed not only the visual quality of the old raster maps, but also to better do their actual job, i.e. presenting the respective pieces of information in a sensible way. This includes the following:
Usually the voltage of 230 V ±3% is maintained. Some areas of the UK still have 250 volts for legacy reasons [citation needed], but these also fall within the 10% tolerance band of 230 volts. In practice, this allowed countries to have supplied the same voltage (220 or 240 V), at least until existing supply transformers are replaced.
The CEE 7/7 plug fits in either French or Schuko sockets. It is rated at 16A and looks similar to CEE 7/4 plugs, but with earth contacts to fit both CEE 7/5 sockets and CEE 7/3 ones. It is polarised when used with a French-style CEE 7/5 socket, but can be inserted in two ways into a CEE 7/3 socket.
If you've been having trouble with any of the connections or words in Wednesday's puzzle, you're not alone and these hints should definitely help you out. Plus, I'll reveal the answers further ...
In Italy, CEI 23-50 is the dominant standard and it also includes Schuko sockets (P 30 = CEE 7/3) and plugs (S 30 = CEE 7/4, S 31 = CEE 7/7, S 32 = CEE 7/17). Appliances are commonly sold with Schuko-type plugs (as well as Europlugs ), while Italian-type plugs have become rare today and almost only power strips, cable reels and adaptors are ...
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