Test Intervals According to DGUV Regulation 3 – Overview for Companies

Every company in Germany is required to have electrical equipment and systems regularly inspected. DGUV Regulation 3 (formerly BGV A3) specifies the intervals at which these inspections must take place. But which intervals apply specifically? When can an interval be extended – and when must it be shortened? This guide provides a practical overview of test intervals for all common types of equipment.

What Does DGUV Regulation 3 Govern?

DGUV Regulation 3 is an accident prevention regulation from the German statutory accident insurance. It requires employers to have all electrical systems and equipment in their company inspected before initial operation and thereafter at regular intervals to verify they are in proper condition. The goal is to protect employees from electrical hazards such as electric shock, short circuit, or fire.

The regulation applies to all industries and company sizes – from offices to workshops to construction sites. What matters is: It's not the size of the company that determines the obligation, but the fact that electrical work equipment is present. A simple extension cord or office kettle already falls under the inspection requirement.

Test Intervals for Portable Electrical Equipment

Portable electrical equipment refers to devices that can be moved during operation or that can be easily transported from one location to another – for example, drill machines, extension cords, power strips, coffee makers, or laptop power supplies. For these devices, the following guideline values according to DGUV Regulation 3 apply:

On construction sites and in manufacturing facilities: A repeat inspection is required every 6 months. On construction sites with particularly high stress, the interval can be shortened to 3 months. The reason: Dirt, moisture, and mechanical stress significantly increase the risk of failure.

In offices and similar environments: The base interval is also 6 months, but if a documented failure rate below 2% is achieved, the inspection interval can be extended to up to 24 months. This extension must be documented and supported by the results of previous inspections.

Test Intervals for Stationary Electrical Systems

Stationary electrical systems are permanently installed facilities such as control cabinets, distribution boards, outlet circuits, or lighting systems. Their inspection is more complex and requires specialized measurement technology. DGUV Regulation 3 specifies an inspection interval of 4 years for stationary systems.

For systems in special-purpose rooms as defined in VDE 0100 Group 700 – including wet rooms, medically used areas, construction sites, campgrounds, and classrooms with experimental equipment – a shortened interval of 1 year applies. These areas present increased electrical hazards, so more frequent checks are required.

Who Is Qualified to Conduct Inspections Under DGUV Regulation 3?

Inspections under DGUV Regulation 3 may only be performed by a competent person as defined in TRBS 1203. Specifically: An electrical professional with a completed electrical trade apprenticeship (e.g., electrician, electrical engineer, electrical technician) and at least one year of relevant work experience. Alternatively, an electrically trained person under the direct supervision of an electrical professional may perform certain inspection steps.

Many companies hire external testing service providers since the requirements for measurement technology and documentation are high. Important: The employer remains responsible for compliance with test intervals – even if they delegate the testing. The occupational association can issue fines for violations, and in case of damage, insurance coverage may be lost.

Documentation and Test Labels

Every inspection must be fully documented. An inspection report according to DGUV Regulation 3 must contain at least: Equipment designation and inventory number, inspection date, testing method used, measured values and assessment, name of the testing person, and the next inspection date. This documentation is the proof to occupational associations, authorities, and insurers.

In practice, labeling with test labels has proven effective. A colored test label on the equipment shows at a glance when the last inspection was conducted and when the next one is due. Particularly practical are test labels with barcodes or inventory numbers that enable digital tracking. At barcodeetiketten.com, you'll find test labels according to DGUV V3 in various formats – from the classic round test label (Ø 30 mm) to the test label with barcode for digital inventory management.

Failure Rate as a Control Tool

DGUV Regulation 3 allows flexible adjustment of test intervals based on failure rate. As a guideline: If the failure rate is a maximum of 2%, the chosen inspection interval can be considered appropriate. If it's significantly lower, the interval can be extended. If it's higher, the inspection interval must be shortened.

To correctly calculate the failure rate, companies must evaluate inspection results over several cycles. Here too, inventory labels with barcodes help: Through unique identification of each device, the inspection history can be recorded without gaps digitally. Inventory labels from barcodeetiketten.com are ideal for uniquely identifying all equipment subject to inspection.

Practical Tips for Implementation

Compliance with DGUV Regulation 3 test intervals can be significantly simplified with a systematic approach. First, create an inspection inventory – a complete list of all electrical equipment with location, type, and next inspection date. Equip each device with an inventory label to ensure seamless tracking. Set inspection intervals based on risk assessment and schedule the next appointment in good time.