- Published 24 Jan 2023
- Last Modified 9 Aug 2023
- 2 min
What is Voltage Testing?
Discover how to safely conduct voltage testing in this guide.
Published March 2022
Voltage testing is an essential procedure that should be completed before carrying out any work on an electrical installation.
Ensuring the absence of voltage can be vital for safety reasons and the main purpose is to limit the risks that live electrical circuits and equipment can pose to individuals.
Voltage testing is part of a broader process, consisting of four stages aimed at carrying out the electrical lockout of an installation:
- Separation: De-energising the installation
- Lockout: Using lockout systems for safe isolation
- Identification: Identifying the device requiring intervention
- Power: Ensuring the device is powered off
Why Use a Voltage Tester?
Although testing can technically be carried out with a standard voltmeter, a dedicated voltage tester is recommended. These devices are designed specifically for this purpose and offer characteristics and functionalities that are adapted for voltage testing. These typically include:
- Self-test functionality
- High-quality
- Insulated probe tips
- Calibration according to the applicable standards
- Magnetic sensing for one-touch measurement
PPE for Voltage Testing
Due to the potential hazards involved, voltage testing requires certain items of personal protective equipment to be worn or used. The necessary PPE includes:
- A helmet or face shield
- Protective goggles
- Insulating gloves
- Safety shoes
- An insulating floor mat
How to Check for the Absence of Voltage
The procedure for checking the absence of voltage is as follows:
- Verify the correct operation of the voltage tester using the self-test function
- Take a ground reference measurement of all the component terminals
- Measure each phase and the neutral
- Immediately verify the correct operation of the voltage tester using the self-test function
Once the absence of voltage has been verified, work can be carried out on the installation with the power off and any work needed on the device can safely begin.
Key Products
Voltage Testers
Voltage test devices are used to verify the absence of voltage in agreement with safety standards.
Insulating Mats
Electrical insulating mats are vital pieces of safety equipment that provide you with protection against high voltages.
Insulating Gloves
Insulating gloves are part of the PPE that should be worn for safety reasons when working with electrical installations.
Face Shields
A face shield should be worn when performing voltage testing work to protect the face and adhere to safety standards.