The big worry with ALL of those is that they'll happily accept a CEE 7/7 or Schuko plug without completing the ground connection.
The only multi-standard sockets that I've seen that looked fairly safe and acceptable were CEE 7/7 and Italian combos.
![[Linked Image from audiokit.it]](http://www.audiokit.it/itaeng/SpineCiabatte/30212.jpg)
That type of outlet accepts either :
![[Linked Image from musiclab.it]](http://www.musiclab.it/store/images/cavo220.JPG)
Italian plug
or
![[Linked Image from xinrek.com]](http://www.xinrek.com/image/product/cee-7-7-3-iec-c13.jpg)
It's found in Italy, but also in Croatia, Monenegro and possibly other parts of Former Yugoslavia which seems to have a heavy Italian influence these days.
I actually quite like the Italian plug, it's very neat and does not have the grounding problems that Schuko / CEE 7/7 presents i.e. you can't mate a grounded italian plug with an ungrounded socket outlet without taking a hacksaw to the ground pin!
The IEC proposal for a world-wide 230V 50Hz outlet is very similar to the existing Swiss outlet (the IEC is HQ'd in Switzerland...)
Only difference being a slightly modified pin layout and rated for 16amps and always recessed.
IEC 60906-1
I think any country with multiple old standards should re-standardise to this. It should be an IEC requirement. It would clean up the mess in India for example quite nicely.
![[Linked Image from upload.wikimedia.org]](http://upload.wikimedia.org/wikipedia/commons/thumb/1/10/IEC-906-1-plug.svg/200px-IEC-906-1-plug.svg.png)
So far, only Brazil has officially adopted the standard.
![[Linked Image from tecnocracia.com.br]](http://tecnocracia.com.br/wp-content/uploads/2007/07/tomadas_padrao3pinos.jpg)