![]() ![]() ![]() The most basic models indicate only whether any voltage is present. Most models inform you of the voltage present with a red light at the tip of the tester as well as a buzzing sound. You can get a reading simply by sticking the tip of the tester into an outlet slot or even touching the outside of a wire or electrical cable. The device is like a mini wand with a small tip on the end that senses voltage in such things as electrical wiring, outlets, circuit breakers, lamp cords, light sockets, and switches. They are safe, easy to use, and inexpensive. Non-contact voltage testers (also known as inductance testers) allow you to check for voltage in wires or devices without you having to touch any electrical parts.
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