The map shows the usability of the plugs CEE 7/7, CEE 7/17 and CEE 7/16 in the respective countries using different shades of green. From lightest to darkest: CEE 7/16 europlugs only, all plugs unearthed up to 5A (in BS 546 socket), all plugs unearthed up to 16A, all plugs up to 16A (earthed plugs earthed).
Own work (Own work based on: BlankMap-World6.svg)
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