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Methods and Techniques of Grounding: The Case of Production Industry in Tanzania
MUST JOURNAL OF RESEARCH AND DEVELOPMENT,
Vol. 1 No. 3 (2020): Methods and Techniques of Grounding: The Case of Production Industry in Tanzania
Abstract
This paper presents an investigation of different grounding system techniques used by industries in Mbeya region. Mixed methods were used to generate data for grounding techniques and then presented in this paper. The measurements of type of soil and its resistivity were collected and analyzed. Three methods of measuring soil resistivity; Wenner Array Method, Schlumberger Array Method and Driven Rod Method were discussed and results were compiled and analysed. Furthermore, three grounding schemes used in industries; solidly grounding, ungrounded, and impedance grounding were analysed. The results, obtained from the experimental measured data, revealed that cause of failure were due to poor grounding and other different types of faults which were estimated to be 20% to 30%. Selected production industries were Tanzania Breweries
Limited, Coca Cola, Pepsi, City coffee and Mbeya University of Science and Technology . Findings show that most of production industries use solidly grounding system, although they tend to corrode due to the presence of high amount of moisture contents ranging from 30% to 60% and salt mineral contents of 2.4% which results in low resistivity. This study concludes that solidly grounding is the best method to be adopted.
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