How To Use Electrical Tester

If you are planning to do electrical work, it’s crucial to know how to use electrical tester. This tool can help you determine whether the circuit is live or not. In this article, we will guide you through the process of using an electrical tester.

Types of Electrical Tester

Before we proceed, let’s first identify the types of electrical tester. There are two types of electrical tester: the non-contact voltage tester and the contact voltage tester. The non-contact voltage tester is used to detect the presence of voltage without making contact with a wire or an electrical terminal. The contact voltage tester, on the other hand, is used to test the voltage by touching the wire or the electrical terminal.


Before using an electrical tester, it’s important to prepare yourself and the surroundings. Make sure that you are wearing safety gear, such as rubber gloves and safety glasses. Also, ensure that the area where you will be working is dry and free from any moisture. This will prevent you from getting electrocuted during the testing process.

Using a Non-Contact Voltage Tester

To use a non-contact voltage tester, follow these steps: 1. Turn on the tester by pressing the power button. 2. Hold the tester near the wire or the electrical terminal you want to test. 3. If the tester detects voltage, it will beep, flash, or vibrate. It’s important to note that a non-contact voltage tester can only detect voltage but cannot measure the voltage level.

Using a Contact Voltage Tester

To use a contact voltage tester, follow these steps: 1. Turn off the power to the circuit you will be testing. 2. Insert the tester’s probes into the electrical terminal or wire you want to test. 3. Turn on the power to the circuit. 4. The tester will display the voltage level.


What is an electrical tester?

An electrical tester is a tool used to test the presence and level of voltage in a wire or electrical terminal.

Can an electrical tester measure the voltage level?

Yes, a contact voltage tester can measure the voltage level, while a non-contact voltage tester can only detect the presence of voltage.

Is it safe to use an electrical tester?

As long as you follow the proper safety precautions and procedures, using an electrical tester is safe.

What should I do if the electrical tester detects voltage?

If the electrical tester detects voltage, turn off the power to the circuit before proceeding with any work.


In conclusion, knowing how to use electrical tester is essential for anyone who plans to do electrical work. By following the steps and safety precautions outlined in this article, you can ensure that you are using the electrical tester safely and effectively. Remember to always turn off the power to the circuit before testing and wear proper safety gear to prevent accidents.