(introduction...)

After completion of the electrical plant the supplier of the electrical plant will have to test the installed plant prior to handing over to the customer.

By the tests to be performed on the one hand the expert construction of the plant regarding function and on the other hand its safety will have to be established.

The results are to be laid down in a test certificate if so required by the user of the electrical plant. For each system the following tests are to be undertaken:

- visual inspection,
- ascertaining the insulation resistance,
- functional test

During determining the insulation values and when carrying out the functional test special care will have to be taken. These tests are being performed with a test voltage or the mains voltage applied. There is an increased risk of accident.