Originally Posted by
docbert
Go with the three prong ones.
Ignoring the fact that the 2 prong ones are probably illegal, the one I have does a poor job of actually staying connected properly - especially when you put the weight of a plugpack/etc on top of it, and I suspect most are the same.
I bought one on the logic that it would be good to use for things like a phone charger which is not earthed, but after using it once I gave up and went back to only using earthed ones.
Agreed. I just got back from my first trip to New Zealand and Australia, which both have the same electrical outlet receptacles. I left home with a “universal” electrical adapter which has a 2 prong plug for use in these countries. It worked very poorly, it could not maintain a secure placement in the outlets. Apparently, in addition to grounding, the third prong releases or engages a spring which “secures” a 3 prong plug in place. After the first night, I purchased a 3 prong plug which worked perfectly for the duration of the 2 week trip.