Pretty much every modern European mains powered device is double insulated so it doesn't matter which pole is live and which is neutral. Some countries do have

Pretty much every modern European mains powered device is double insulated so it doesn't matter which pole is live and which is neutral. Some countries do have polarized connectors (UK, some Polish, France, Belgium, etc.) but many do not. However supposedly competent electricians sometimes connect them the wrong way round anyway or omit the earth or both as I discovered in France last year. See this web page for a convenient list of mains connectors and countries that use them: https://www.worldstandards.eu/electricity/plugs-and-sockets/ https://www.worldstandards.eu/electricity/plugs-and-sockets/