How to use a multimeter to quickly find where the leakage is?
With the increasing number of rainy and humid weather, there have been more reports of faults caused by electrical leakage. I believe many electrician friends have been racking their brains to find the cause of electrical leakage. So how can we easily identify the cause of electrical leakage by using a multimeter correctly?
Before analyzing where the leakage is, we need to first look at what fault phenomena have occurred in the home and what obvious characteristics are present; Next, observe the surface for any obvious fault points, and then proceed to the next step of inspection.
Specific inspection steps for using a multimeter:
1. First, disconnect the main isolation switch of our power supply incoming line and turn off all electrical loads of the user, such as unplugging the refrigerator plug, disconnecting the water pump switch, etc.
2. Place the gear of the digital multimeter in the 200M range of the ohm range, place one probe on one of the two output lines on the load side, and touch the wall with the other probe to touch the grounding wire or temporary grounding wire. After the number displayed on the multimeter stabilizes, the insulation resistance value of the main circuit is read out. If the insulation resistance value is less than 0.5 megohms, then there is a problem with the main circuit. If the insulation resistance is above 0.5 megohms, then it can be ruled out that there is a problem with the main circuit. Measure another wire using the same method and check the value to see if there is a problem with the main circuit.
3. Check the insulation resistance values of the branches and various electrical appliances using the same method until the fault point is found
