Uploaded February 2021 | Updated September 2026, 55 minutes ago
This video shows how to test Non-contact voltage testers using 220V AC synchronous motor.
This type of motor can be found in microwave turntable motor.
Non-contact voltage testers work by sensing a very small amount of current that is capacitively coupled from the live circuit to the tester and back to ground. Non-contact voltage testers light up when they detect this current without needing to make direct contact.
A built-in sensor at the tip of the tester detects the presence of voltage when touching a conductor, outlet, or supply cord. By holding the tool, you are the ground reference through capacitive coupling. When the tip glows red and the unit beeps, you know voltage is present.
When one pole of microwave turntable motor touches the human body, it becomes grounded, and the other wire generates a voltage to the ground.
220v ac synchronous motor(from microwave turntable motor) can generates 350V AC voltage & 2mA current. So, you can test non-contact voltage testers using microwave turntable motor.
This type testers can detect only AC voltage. If the unknown voltage is DC high voltage, it cannot be detected.
This video shows how to test Non-contact voltage testers using 220V AC synchronous motor.
This type of motor can be found in microwave turntable motor.
Non-contact voltage testers work by sensing a very small amount of current that is capacitively coupled from the live circuit to the tester and back to ground. Non-contact voltage testers light up when they detect this current without needing to make direct contact.
A built-in sensor at the tip of the tester detects the presence of voltage when touching a conductor, outlet, or supply cord. By holding the tool, you are the ground reference through capacitive coupling. When the tip glows red and the unit beeps, you know voltage is present.
When one pole of microwave turntable motor touches the human body, it becomes grounded, and the other wire generates a voltage to the ground.
220v ac synchronous motor(from microwave turntable motor) can generates 350V AC voltage & 2mA current. So, you can test non-contact voltage testers using microwave turntable motor.
This type testers can detect only AC voltage. If the unknown voltage is DC high voltage, it cannot be detected.
