A useful source:
https://worldofsockets.com/
this post was submitted on 29 Jul 2025
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I would argue that neither of the plugs shown in the picture nor those mentioned by others are the best.
Ignoring current adoption, I think that IEC 60906-1 is the best plug. It is very similar to the Swiss plug and was intended to, at least in the EU, replace other plugs. It has quite a few advantages over the other plugs. It is rated at 16 A, has a compact form factor, is polarised, and has almost all the common protections except fuses (which are pretty much useless anyway). Currently it only is used in South Africa without major changes to the plug.
Compared to the Schuko (Type F):
Compared to (Typ G)):
Regarding three-phase power, I would argue that Swiss type 15 (10A) and type 25 (16A) plugs are the best. These are really cool because while beeing the same size as Schuko (Typ F) plugs, they can transfer three-phase power (so 11 kW; 230 V / 16A on all three phases). They also fit standard Swiss single-phase and Euro plugs. This makes plugging in large appliances like electric stoves much easier than in other countries.
I would find it quite cool if most countries switched to one common plug, and I think IEC 60906-1 would be best for that. It would also be possible to build hybrid sockets for many common plugs during the transition phase.
After making this post, reading all the comments and doing even more research. I have to say I 100% agree with you.
I'm glad.
Maybe it's unreasonable but I still hope that maybe countries will decide to switch to this connector.
The large amount of different, outdated standards definitly are a safety risk and hassle, even within the EU (e.g. a Schuko Typ F plug can be plugged in in Denmark but then it has no ground connection. Which is a common thing people there do).
So it would be pretty great to have this be the new common connector in all 220V-240V 50 hz countries.
Once I have my own house in South Africa, I'm switching all the plugs over.
Let's hope the movement catches on, I hope Brazil switches to the 16A specific standard.