How Do You Use a Circuit Tester?

To use a circuit tester, begin by protecting yourself from electrical shocks by using a circuit tester with an insulated grip. Insert the probe into the main holes of the wall outlet, and monitor the voltage. After checking the amount of voltage it displays, gently remove the probes from the power outlet.

  1. Hold the insulated part of the tester

    Before testing your circuit, ensure that your circuit tester is insulated. Hold the insulated part to protect yourself from all types of electrical shock. Most circuit testers come with insulated parts, but when checking the circuit, avoid touching the exposed metallic parts of the probe for additional security.

  2. Insert the probes into the main holes

    Insert the probes into each main hole of the wall outlet. It is not necessary to put any probe into the ground if you have a probe on the outlet. Follow the directions given by the manufacturer when inserting the probes.

  3. Monitor the display

    View the voltage indicator on the tester to monitor the amount of voltage coming from the outlet. The amount of voltage varies depending on the type of outlet used. Failure to obtain enough voltage is a sign of electrical shorts or leakages. If you can not obtain the required voltage, check your circuit to ensure the sufficient flow of power. After testing your circuit, remove the probes from the power outlet gently. Do not pull the probes harshly because they can stick in or tear a connector in the outlet.