EN 50191 Safe Workspaces

Best Practices for Setting Up and Operating Electrical Test Installations

Electrical safety testing is a vital step in ensuring that products are safe, compliant, and reliable. Whether you are validating prototypes, running production line checks, or maintaining hire equipment, testing brings inherent risks. To manage these safely, international standards like EN 50191 provide a framework for best practice in electrical test installations

Why EN 50191 Is Important for Electrical Safety

The EN 50191 standard sets out requirements for the safe operation of electrical test equipment in workplaces. It complements product-specific CE directives such as the Low Voltage Directive and the Machinery Directive. By following EN 50191, companies not only remain compliant but also protect operators, reduce risks of electrical shock, and improve product quality

Best Practices for Safe Test Installations

1. Train and Authorise Personnel

• Only trained and competent staff should operate or supervise test equipment.

• Skilled personnel must understand electrical hazards.

• Instructed personnel must be supervised with clear guidance.

• Regular refresher training ensures ongoing compliance.

2. Design Safe Test Areas

• Install barriers (grids, walls, or enclosures) to prevent unauthorised access.

• Use signal lights (red/green) to show operational status.

• Provide clearly marked emergency stop switches inside and outside test areas.

• Define and enforce prohibition zones around live parts, especially in high-voltage environments.

3. Understand Different Test Station Types

Test installations can vary depending on use:

• Automatic protection stations: enclosures disconnect power when opened.

• Non-automatic protection stations: require barriers, extra supervision, and strict procedures.

• Laboratories and experimental stations: support multiple users and complex setups.

• Temporary stations: used for short-term or field testing.

Each type has its own safety measures, but all aim to minimise the risk of electric shock.

4. Follow Operational Safety Measures

• Prevent test circuits from re-energising automatically after power loss.

• Discharge residual voltages before handling equipment.

• Avoid carrying out assembly work during live testing.

• Regularly inspect and maintain protective devices like barriers, interlocks, and emergency cut-offs.

5. Assign Clear Responsibility

Every installation should have a nominated responsible person who oversees testing activities, authorises switching, and ensures compliance. This prevents errors and enforces accountability.

Building a Safety-First Culture

Meeting the requirements of EN 50191 is more than just ticking boxes—it’s about protecting people, safeguarding equipment, and creating efficient workflows. When implemented correctly, these practices reduce the risk of accidents while improving quality control and productivity.

At Caltest, we don’t just supply electrical safety test equipment—we also provide technical support, calibration, and servicing to keep your systems safe and compliant. Our expert team can help you select the right solutions and maintain them to the highest standards.