How to distinguish the zero line and the fire line in the multimeter - Solutions - Huaqiang Electronic Network

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In general, the identification of the neutral line in the mains, the fire line, non-use low-voltage test pencil is not, can use the multimeter to distinguish between the fire line and the zero line? The answer is yes, the method is as follows:
Turn the multimeter's range switch to the AC voltage of 250V or 500V. The black pen is connected to the indoor plumber's wet ground, the land, etc., the red test pen is in contact with the power cord or the power socket hole, and the multimeter indicates the higher voltage value is the fire line. A zero line with a low or zero voltage.