How to use the multimeter to determine whether the ground wire is properly earthed?
Measurement of ground wire: FireWire, zero line and ground line separation, multimeter or just stalls real (above the exchange file 220V), red and black probe were inserted into voltage and COM holes. Were measured by 2 probe, line voltage, line voltage to zero line to the ground, if the 2 voltage value is basically the same, indicating earthing voltage on the ground; and if the live value is zero or very small that no ground ground.
First line of fire, zero line. Ground wire: use multimeter to switch to AC voltage, and gear is higher than 220V. The red pen pen is black hole insertion voltage, plug, then use the red pen is inserted into a socket plug therein, observe the reading. The maximum reading is for the line of fire, the readings are smaller, the lines are zero, and the readings are virtually untouched. If 2 readings are small, one readout indicates that the ground wire is not grounded and the ground wire is connected to the zero line. The next second steps do not need to be measured.
Earth wire: a wire used to introduce electric current into the earth; electrical equipment leaks or when the voltage is too high, the current passes through the earth wire into the earth.
