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.
| Device type | Area of application | Recommended inspection period |
|---|---|---|
| Office equipment (PCs, printers, monitors) | Offices, administration | All 24 months |
| Tools (drill, grinder) | Workshop, production | All 12 months |
| Equipment on construction sites | Outdoor areas, shell construction | All 3 months |
| Devices in humid environments | Kitchen, cleaning, outdoor storage | All 6 months |
| Device type | Area of application | Recommended inspection period |
|---|---|---|
| Heating/air conditioning systems | Building installation | All 48 months |
| Machines in production | Industry & Crafts | All 12 months |
| Devices with high dust load | Workshops, carpentry | All 6–12 months |
| Device type | Area of application | Recommended inspection period |
|---|---|---|
| Nursing beds | Nursing homes, clinics | All 12 months |
| Medical devices | doctor's office, rehabilitation centers | All 6–12 months |
| PRCD devices | Construction sites, mobile use | All 3 months |
| Power generator (mobile) | Events, construction sites, emergency plans | All 6–12 months |
| residual current circuit breaker | All areas | All 6 months |
| Plant type | Recommended inspection period |
|---|---|
| Main & sub-distributions | All 48 months |
| Construction site power distribution board | All 3 months |
| Thermographic tests | All 12 months (recommended) |
| Emergency power systems / UPS | All 12–24 months |
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