A quick lesson in electrical leak detection with a multimeter
As is well known, leakage of electrical equipment can occur at any time. How to detect leakage in a timely manner? Here are several simple methods that you may want to give them a try.
Firstly, measure the leakage voltage with a multimeter. Place the multimeter switch on the AC voltage measurement range, usually at the AC voltage 250V range. Then, insert the black probe into the soil near the tested equipment and the red probe into the metal casing of the equipment. At this point, look at the reading on the multimeter. If the needle does not move, you can gradually shift it to a lower gear until the specific data is indicated, which is the leakage voltage of the device. If there is still no indication when the probe is in the low range, it means that there is no leakage phenomenon in the device.
Secondly, use a test pen to check for any electrical leakage. The inspector holds the test pen and directly connects it to the metal casing of the electrical equipment. When the neon tube in the test pen lights up, it indicates that the equipment has leakage and the leakage voltage is high. When the neon tube does not light up, it does not indicate that there is no leakage phenomenon in the equipment. It may be because the neon tube cannot light up due to low leakage voltage, or there may be no leakage voltage.
Thirdly, when there is no multimeter or test pen, you can touch the metal casing of the electrical equipment with the back of your hand. When there is hand numbness or electric shock, it indicates that the device has leakage voltage. Be vigilant when there is a sense of electric shock, as it indicates that the leakage voltage is relatively high. Stop the machine for inspection and analysis of the cause, eliminate the fault before use, otherwise electric shock accidents may occur.
