Inspection periods

How often do electrical devices need to be checked?

DGUV Regulation 3 requires that electrical equipment and systems be inspected regularly – but how often exactly?
This page gives you an overview of typical inspection periodsso that you can Fulfilling safety responsibilities legally.
Important: Actual intervals depend on the use, environment, and risk assessment. Our recommendations are based on experience and applicable standards.

Portable electrical devices

Device typeArea of applicationRecommended inspection period
Office equipment (PCs, printers, monitors)Offices, administrationAll 24 months
Tools (drill, grinder)Workshop, productionAll 12 months
Equipment on construction sitesOutdoor areas, shell constructionAll 3 months
Devices in humid environmentsKitchen, cleaning, outdoor storageAll 6 months

Stationary equipment & machines

Device typeArea of applicationRecommended inspection period
Heating/air conditioning systemsBuilding installationAll 48 months
Machines in productionIndustry & CraftsAll 12 months
Devices with high dust loadWorkshops, carpentryAll 6–12 months

Special equipment & systems

Device typeArea of applicationRecommended inspection period
Nursing bedsNursing homes, clinicsAll 12 months
Medical devicesdoctor's office, rehabilitation centersAll 6–12 months
PRCD devicesConstruction sites, mobile useAll 3 months
Power generator (mobile)Events, construction sites, emergency plansAll 6–12 months
residual current circuit breakerAll areasAll 6 months

Recurring system inspections

Plant typeRecommended inspection period
Main & sub-distributionsAll 48 months
Construction site power distribution boardAll 3 months
Thermographic testsAll 12 months (recommended)
Emergency power systems / UPSAll 12–24 months

What events should be checked additionally?

After repairs or modifications
After faults or short circuits
After a long period of inactivity or storage
Before initial commissioning (initial inspection)

Our tip: Don’t forget the risk assessment!

The Risk assessment is required by law and forms the basis for your individual inspection periods.
We are happy to support you in the creation and implementation!

Let us help

📞 Personal advice for your industry

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Would you like to learn more about industry-specific testing concepts?

+49 177 49 50 635 – we will advise you individually and without obligation.

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