asked in Home+Garden by
Bought a water heater and it has not connected a plug. There are three wires probably phase,neutral and earth wire. The colors of wires are red green and black. Of these which one is phase and which is neutral. How can I find earth and neutral wire using a multimeter? Are all devices having the same colour code in wires? Help me to connect the device to a 3-pin plug

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answered by (57 points) 3
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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