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> Belgium still has 220Y/127 distribution, but now with all loads connected phase-to-phase to get 220.

I wonder where you found this info. It might be the case in a couple of small villages and even very local areas of old towns (though I doubt it) but 127V is an obsolete standard and it is very rare now.

It was our friend "Belgian" who mentioned it on the forum here a few months ago. I can't remember if it was where he lives or somewhere nearby which he said is still wired this way..

Eli, if you're reading this, perhaps you could help us out! [Linked Image]

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but also Saudi Arabia, have 127/220V (60 Hz) as one of several systems.
I should have remembered that one. They seem to use British fittings for some (all?) of their work, and the MK (British) catalog lists UK-style dimmers for 127V, as well as NEMA 5-15 configuration receptacles but on a British plate.