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ISO have defined line neutral and live, low voltage and extra low voltage, and many more. However much I think 230 volt AC should not be called low voltage, or the line should be called live, it is not down to me, it is down to the international standards organisation.
So yes lamp holder may be to BS EN 60238, it seems they are used in Europe so polarity does not matter, not sure how they work?
I think this was trying to say I had misspelt live, in this country every plug and socket-outlet shall be of the non-reversible type, but in other countries that is not the case, so in the UK in circuits of a TN or TT system. except for E14 and E27 lampholders complying with BS EN 60238, the outer contact of every Edison screw or single centre bayonet cap type lampholder shall be connected to the neutral conductor. This regulation also applies to track mounted systems.Might even have a live centre…….
So yes lamp holder may be to BS EN 60238, it seems they are used in Europe so polarity does not matter, not sure how they work?