Nowadays, we simply cannot imagine the world without electricity and electrical installations, which are already practically everywhere. Therefore, the introduction of appropriate standards and regulations that needs to be adhered to, constantly updated and exacerbated, is necessary in order to provide much needed control in the field of electrical installations. It is necessary to emphasize the importance of testing the safety of electrical installations and the work of the controller. This ensures standardization and, above all, the safety of users as well as the facilities themselves. In the graduation work, we want to present to the reader theoretical background from the field of low voltage electrical installations, answers and suggestions on how to properly inspect, measure and test individual parts of the installation. In addition to the theoretical work, the reader is finally presented a concrete practical example with the appearance of the final report, which is made according to the appropriate protocol and additonal part for students.