Follow these steps to measure the leakage current with a multimeter
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Multimeter can not only measure the voltage can also be measured at the same time leakage. There are two ways to measure leakage, one is the resistance method, the other is the voltage method, regardless of the resistance method or voltage method, the red pen is inserted in the VΩ hole of the multimeter, the black pen is inserted in the COM hole of the multimeter.
Resistance method how to measure whether an electrical device leakage, first of all, turn off the power supply of electrical equipment, use the multimeter, first help the multimeter gear to the resistance of the beeping gear. One of the pens of the multimeter rests on the shell of the electrical equipment, and the other pen rests on the fire wire and zero wire, if the multimeter makes a ringing sound, it means that the electrical equipment is leaking electricity seriously, and the location of the leakage must be checked out.
If the multimeter does not sound, to raise the multimeter resistance gear level by level, until the measurement of the resistance value, the general provisions of the resistance value of less than 0.38M ohms for the leakage, higher than 0.38M ohms for the non-leakage.
Voltage method to measure leakage of electrical equipment, close the switch of electrical equipment, help the multimeter gear to the AC file 700V gear (each multimeter gear may be different, adjusted to the current file maximum gear), the multimeter's red pen on the shell of the electrical equipment, the black pen on the zero line, the multimeter shows the voltage, indicating leakage of electrical equipment, the multimeter shows that the zero voltage, indicating that the leakage is not.
Voltage method of measuring leakage has certain limitations, can only measure the fire line leakage, but can not measure the zero line leakage. If there are capacitive components in the electrical equipment, it will also affect the accuracy of the voltage method, so it is not recommended to use the voltage method.
