Frequently Asked Questions

Earth/Polarity - How to tell polarity if no earth is present in the country?

Question: Is it impossible to judge the polarity correctly, unless the earth LED turns green? Example: Japan.

Answer: Polarity is with respect to earth.

Correct polarity has the neutral conductor at (close to) earth potential and the live conductor at the nominal mains voltage (+/- tolerance).

Without an earth in the system, it is not possible to determine polarity as it is referenced to earth.

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