>If it’s AC current neutral can be live too and live can be neutral too. Isn’t it?
It’s an easy misunderstanding but AC does not mean that there is a constant change of positive voltage between two wires, i.e. wire one flickeres up to 240V wile wire two surges down to 0 and vice versa.
It means that the live wire rapidly changes from a positive to a negative voltage relative to the neutral wire.
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