Also keep in mind that in Europe not every install is 230 p-n., most are but exceptions exist. In Norway 230 volt IT (ungrounded) power is the norm with resi, older western Euro installations have 127/220 or 138/240 power where sockets just take both phases for 230 volts. Many (still modern) Euro none grounding plugs can also be reversed (non polarized) with either leg getting 230 volts to ground.
If you are testing these for true international use make sure you do a swapped polarity test, along with a hot-g-hot line test.