How to Use a Voltage Tester

A voltage tester is a simple device that checks for the availability of a current passing through a circuit. To use this type of tester, the current must be running. Voltage is a measurement of the electromotive force or the difference in charge between 2 different points of an electrical field. You can also use a voltage tester to check if a wire has sufficient voltage to power up certain electrical devices and machines. The steps below discuss how to properly use a voltage tester.

Step 1. Choose What Voltage Tester to Use

There are different types of voltage testers. The simplest voltage tester is the neon 2 wire voltage tester. This tester can measure from 0 to 500 volts. This type of tester is also the least expensive. The easiest to use is the digital multi-meter. Once the tester is connected to a circuit, it can provide the electrician with an instantaneous reading. It can also be used to read amperage and resistance. The plug tester is also a very useful device that can measure voltage in receptacles and ensure if the receptacle is correctly wired.

Step 2. Make Sure to Use a Reliable Voltage Tester

Ensure that the device you are using is working properly. There are two probes on a typical tester. Turn the tester on and have the tips of the probes touch each other. If the light on the housing of the tester is lit when the tips touch, the tester is working perfectly. Afterward, test it on a live circuit to check if it reads the correct voltage. If the tester does not read the voltage on the circuit correctly, replace it with a new one.

Step 3. Set AC or DC Voltage and Voltage Range

Set the voltage tester to AC or DC depending on the current you want to check for voltage. Electrical outlets in homes use AC. Car stereos use DC.  Also set the meter to the appropriate range. Electrical outlets used in homes typically have a 120 to 220 voltage. Electrical appliance such as car stereos have a 12 to 14 volt range.

Step 4. Check for Voltage on Electrical Outlets Using a Two-Pronged Voltage Meter

To check for voltage in an electrical outlet in a home or office, attach the red and black lead to each screw on the sides of the outlet. When the light on the voltage tester housing lights up, it means that the outlet has voltage. To determine the voltage, use an analog multi-meter or digital multi-meter.

Step 5. Use a Plug Tester to Check Voltage on a Receptacle

Voltage on receptacles can be tested by plugging in a plug tester. When the tester lights up, the receptacle has voltage. You can also check if the receptacle is correctly wired.

Step 6. Use a Voltage Detector to Check for Hot Wires

A voltage detector looks like a pen that can be used to probe for any hot wires. The tester can be used to check if wires have voltage up to a certain point.