Tips for Quickly Detecting Electrical Equipment Leakage with a Multimeter
As is well known, electrical equipment may leak electricity at any time. How can we detect leakage in a timely manner? Here are several simple methods for you to try:
First, measure the leakage voltage with a multimeter:
Set the multimeter's selector switch to the AC voltage measurement range, typically at the 250V AC position.
Insert the black test lead into the soil near the equipment and connect the red test lead to the metal casing of the equipment.
Observe the multimeter reading:
If the pointer does not move, switch to lower voltage ranges one by one until a specific value is displayed-this is the equipment's leakage voltage.
If there is still no reading on the lowest range, the equipment has no leakage.
Second, check for leakage with a voltage tester:
Hold the voltage tester and directly touch its tip to the metal casing of the electrical equipment.
If the neon tube inside the tester lights up, it indicates that the equipment is leaking electricity, usually with a relatively high leakage voltage.
If the neon tube does not light up, it does NOT confirm the absence of leakage. The voltage may be too low to activate the tube, or there may be no leakage at all.
Third, when neither a multimeter nor a voltage tester is available, use the back of your hand to touch the metal casing of the electrical equipment:
If you feel a tingling sensation or electric shock, it indicates the presence of leakage voltage.
Pay close attention if you experience an electric shock-this signifies a relatively high leakage voltage. Immediately power off the equipment, investigate the cause, and resume use only after troubleshooting and resolving the fault. Failure to do so may result in electric shock accidents.
