Assessment of earthing resistance and lightning arrester performance at Busitema university

Abstract

This study evaluates the effectiveness of earthing systems and lightning arrester performance at Busitema University. Reliable grounding and surge protection are essential for electrical safety, helping to prevent equipment failure and reduce the risk of electric shock. The assessment involved visual inspections and quantitative field measurements of earth resistance using the fall-of-potential method with a Megger DET4TD2 tester. Initial measurements were taken at key locations, including the library, student halls, staff quarters, and the faculty building. Two additional rounds of testing were later conducted: one during hot weather conditions and another shortly after rainfall, while also covering previously inaccessible sites. The results revealed significant variations in earth resistance, with most areas exceeding the recommended safety threshold of 5 ohms. Elevated temperatures correlated with higher resistance values due to decreased soil moisture. The lightning protection assessment showed that several buildings lacked functional arresters or complete grounding connections. These findings highlight the importance of regular inspections, environmental considerations during testing, and timely corrective action to ensure compliance with electrical safety standards. The study contributes to enhancing electrical safety and guiding future maintenance strategies at the university.