Improving the Engineering Block Earthing System at Madonna University, Akpugo Campus in Enugu State, South Eastern Nigeria

The maximum allowable earth resistance for a building varies depending on the application and regulations, but generally, a value below 10Ω is considered acceptable for most residential and commercial buildings. An earthing system stands to provide a lower resistance path to the earth mass for fault current or surge current emanating from lightning strike to be passed on to mass of earth thereby providing safety measures. This research paper reports on how earth resistance improvement was carried out at Engineering block of Madonna University, Akpugo Campus. The existing earthing system there prior to the improvement was 23.5Ω which is very high. To improve on this, the rod system of electrical earthing system was used to improve on it. After the completion and commissioning of the installation, the earth resistance continued to fluctuate as seen from the resistance - days plot but stabilized to 3.5Ω at last showing an improvement of 85.47%.