If a new device, equipment or system is purchased, or if a modification has been made, it must be tested for functionality and for safety against electric shock before it is put into operation for the first time. The device, equipment or system may only be put into operation if these tests are faultless.
The inspection intervals for the repeat inspections then depend on the following factors:
- Error rate, i.e. how often did abnormalities or deficiencies occur during the tests.
- Place of use, e.g. office, construction sites, kitchens, building cleaning, laboratories, schools, etc.
- Frequency of use, i.e. daily or rather every few months
Based on these factors, a hazard assessment is made and the inspection intervals are selected in relation to this hazard assessment. The DGUV V3 recommends a general inspection period of 6 months, i.e. the devices should be inspected every 6 months. However, this is only a guideline, the actual testing interval is determined based on the risk assessment. If the error rate is below or above 2%, the inspection interval can be extended or shortened accordingly.
Here are some examples:
- For power tools in the craft sector, which are used almost daily, the DGUV V3 recommends a period of 3 months. Due to the high stresses, these devices are more often prone to conspicuities and defects.
- For electrical equipment in kitchens for communal catering, the DGUV recommends an inspection period of 6 months.
- Electrical equipment that is used, for example, in building cleaning, laboratories and schools is test period of 12 months is recommended..
- In care facilities and office operations, a testing period of 24 months isprovided because the portable equipment in these areas is often moved little to not at all.