Investigation Of Soil Resistivity Base On Design Of An Experiment Approach

Abadi, Mesiran (2012) Investigation Of Soil Resistivity Base On Design Of An Experiment Approach. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

According to National Electric Code (NEC), ground can be defined as a conduction connection, whether intentional or accidental between an electrical circuit or equipment, and the earth, or to some conducting body that serves in place of the earth. The purpose of an earthing system is to provide a safe path for the dissipation of Fault Current (FC), lightning strike, static discharge, EMI and RFI signals and interference; this is in additional to the safety of the personnel and machinery. Generally, in electrical engineering field, grounding is a vital action. Any fault implicates or involving the ground, large current and raised potential occur which is can be considered as out of normal operating conditions. Soil resistivity testing is a crucial technique or action that must be taken before committing the grounding system. It will determine the impedance of the soil and identify the factors that can affect the resistivity of the soil. The properties or the characteristics of the soil will determine the level or the degree of the soil resistivity. Soil resistivity normally varies according to the conditions of the environment. In this research, two types of soil will be taken as a test subject. The aim of this study is to determine the factors that affect the soil resistivity, to identify the best soil between clay and peat moss for grounding purpose and finally, to analyze the effects of each factor to soil resistivity by using factorial design. Clay, laterite and peat moss with control amount of several materials that represent as natural factors that affecting the soil resistivity will undergo a periodic testing. The tool use for measurement is BS 1377-3. The resistivity values obtain from the test exhibit the relative capability electric currents from which the corrosiveness of the soil can be inferred. Final part of this research is compare the result and analyzed the data by using statistical method.

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