Comment by cesarb

> US style plugs and derivatives (and Australian, Japanese, Brazilian, etc)

Brazil no longer uses US style plugs (though you'll still find them in older installations), it nowadays uses a much safer EU-derived style.

> I find it insane that Brazil continues to be dual exclusive voltage; all of North America is dual concurrent voltage. Every home/office has 120v and 240v available. In Brazil it depends on what state/city you live in - some get 120v, some get 240v.

This is wrong; it's very common to have for instance both 127V and 220V in the same building, sometimes even side by side in the same wall faceplate; 127V is phase to neutral, 220V is phase to phase (on the common 3-phase system). Yes, it does depend on the city, some cities use 220V exclusively, and there are a few other variations, but AFAIK the 127V/220V 3-phase combo is the most common.

> Even worse they use the same standard plug design for both so you'd better hope the plug is the right color or has the right sticker. And you can't be sure you can take electrical appliances from one city to the next! At least they should have adopted different plugs for different voltages.

Yeah, at least it's better than the confusing mix of legacy sockets we had before (which already were mixed voltage - and yeah, we already used the "120V 5-15 NEMA plug" aka "computer plug" even for 220V).