The aim of the thesis was to determine the main uses and methods of the grounding system and to present the basic reasons for and against grounding. The first chapter of the thesis describes the grounding system. The methods of grounding the neutral point are resistive grounding, inductive grounding, resonant grounding and solid grounding. The selection of the system neutral point, grounding at points other than the system neutral point and the location of the system grounding point are described. The second chapter gives us the basic problem of grounding which relates to two contradictory criteria. The third chapter describes grounding systems in distribution networks. The chapter on the dimensioning of the grounding system discussed the criteria that need to be met in order to protect the facilities, but also people and animals. When dimensioning the grounding system with respect to current loads, it is determined by the fault current flowing through it. This method of dimensioning is used only when it comes to low-ohm grounding. The dimensioning of the grounding system with respect to grounding voltages was also discussed. The grounding voltage is equal to the maximum potential difference between the grounding system and the neutral earth. A special description is given of the part of this potential difference called the touch voltage or step voltage, which is dangerous for people. This voltage is proportional to the grounding voltage, so by reducing the grounding voltage, we also increase human safety. The chapter on the design of the grounding conductor discussed the resistance, design and shape of the grounding conductor. The last chapter provides a brief description of the standards used in this work.