The effectiveness of the application of LRM is disclosed through field tests to decrease the resistance of grounding in different configurations of grounding systems. In addition, a chemical electrode is implemented in the soil with greater resistivity to analyze its behavior with respect to other designs. The measurement of the resistivity of different soils, the modeling of each soil and the measurements of the grounding resistances are presented together with these methods. Therefore, with the results of this work and the existing equations for the calculation of the grounding resistance, it is possible to determine the value of the optimum grounding resistance to be obtained by applying LRM. This document aims to be a useful guide to the improvement of grounding systems for engineers and researchers who study, design and build innovative and effective grounding systems with the application of improved composites for safe electrical installations.