Soil resistivity is a crucial parameter to be taken into consideration in designing any electrical grounding system, as the understanding towards its changes over time and soil properties is crucial to ensure transients and fault currents to be able to be dispersed to the earth in shortest time and shortest path possible. National and international standards stated that there is necessity to measure soil resistivity of a site before any grounding system installation could be carried out at that site. Steps and tests needed to be done in finding a suitable site for grounding system installations with Natural Enhancement Material Mixtures were discussed in this work. Three sites were taken into consideration, which only one to be selected, based on soil resistivity assessments that were carried out. The effectiveness of the Natural Enhancement Material Mixtures grounding systems installed at the selected site were also monitored for the duration of one year, by measuring the soil resistivity of the site once in three months. Note that all the sites are located in Universiti of Putra Malaysia, Serdang, Selangor, Malaysia. It is shown that there is general relationship between the soil resistivity values and climate change in Malaysia throughout a year of measurement duration. Also, by installing grounding systems with Natural Enhancement Material Mixtures, the soil resistivity values were slightly reduced over a period of one year.

Grounding system of an electrical device is most needed for the safety of power system purposes. This is due to the need to provide a low impedance medium for fault currents or electromagnetic interference signal to be dispersed into the earth as fast as possible. In the current practice, three phase power systems are grounded by connecting one or more selected neutral points to the grounding system. Therefore, the performance of the grounding system must be in a top-notch condition as it governs the efficiency of the grounding system itself. This could be done by employing enhancement materials in the vicinity of the buried earth rod of the grounding systems as it could reduce its earth resistance and maintain the low impedance value over time. There are two typical types of enhancement materials available in the market nowadays which are natural and chemical based, which are both used in order to decrease the resistivity of the surrounding soil. According to the recommendation proposed by previous researchers, the natural enhancement materials tends to be utilized more widely compared to the chemical enhancement materials due to its eco-friendly properties, corrode free earth rod in a long period of time, non-detrimental the surrounding environment and able to provide an optimum earth resistance value for the installed earth rod grounding systems. Hence, it is the main aim of this paper to highlight the advantages of using Zeolite, Perlite and Vermiculite as the natural enhancement material for grounding system purposes.