How to find a neutral wire on a device?

How to find a neutral wire on a device?
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Answer :

It all depends on from which country you are from. From seeing the wiring color code, I assume that you are probably from an asian country or a country that follows IEC 60446 standards. As you have red colour wire, it must be the phase. Green wire should also have a yellow stripe on it. So it must be ground or earth. So the third one ie: black color wire should be the neutral.
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