The application of good electrical earthing system is inevitable in every electrical installation. This study was carried out to evaluate the earth’s electrical properties of an undeveloped area of Delta State University of Science and Technology, Ozoro, Nigeria. The soil resistance of the study area was determined according to Wenner Four Point method, while the soil resistivity was calculated from the soil resistance obtained. Six locations (A, B, C, D, E and F) were tested across the area; while five probe distances (3 m, 6 m, 9 m, 12 m and 15 m) were adopted at each testing location. Results obtained from the soil test revealed that, the soil resistance and resistivity varied widely across the study area. It was observed that the northern part of the area generally had lower soil resistance and resistivity than the southern part of the study area. The soil resistance ranged between 3.2 Ω and 4.8 Ω at the northern part of the study area; while the soil resistance ranged between 5.1 Ω and 17.2 Ω at the southern part of the study area. In term of the soil resistivity, the results revealed that the northern part of the area had the lowest soil resistivity, compared to the southern part of the area. The soil resistivity ranged from 96.15 Ωm to 324.25 Ωm at the southern region of the area, while at the northern region of the area, the soil resistivity ranged from 60.33 Ωm to 90.49 Ωm. Furthermore, the result established that the northern region of the study area will be suitable for electrical earthing without any soil treatment.

This paper reported on the possibility of using organic materials in the production of green epoxy conductive composites. Epoxy composite samples were produced through the hybridization of carbonized coconut fibre filler (CCS), raffia palm fibre (RPF), carbon black (CB), and carbon fibre (CF), using the simple hand lay-up technique. Then the electrical properties (electrical resistivity and electrical conductivity) and the mechanical properties (tensile strength) of the composite samples were tested accordingly, using the ASTM D6343 – 14, ASTM B193 and ASTM D 3039 approved methods. Results obtained from the laboratory tests revealed that both the CCS and RPF (organic materials) have significant influence on the mechanical and electrical properties of the composite samples. It was observed that the electrical conductivity of the composite samples increased (4.34x10-3 S/cm to 4.48x10-3 S/cm) as the CCS loading increased from 3% to 6% (by mass); before it started to decline after 9% (by mass) CCS loading, recording lowest conductivity of 9x10-4 S/cm at 15% CCS volume. The electrical resistivity of the composite samples was noted to decline from 2.90x107 Ωcm to 2.83x107 Ωcm as the CCS content in the composite increased from 3% to 6%, before it started to increase after 9% CCS quantity, with the S5 composite sample (15% CCS quantity) having the highest electrical resistivity of 3.80x107 Ωcm. Regarding the composite’s mechanical properties, the study depicted that the S1 composite sample had the highest tensile strength of 98.3 MPa, while the S5 composite developed the lowest tensile strength of 62.7 MPa, portraying that the CCS and RAF has a substantial effect on the composites samples’ tensile strength. This study’s results portrayed the possibility of producing lightweight, high-tensile strength conductive composite from organic waste materials, which can be utilized in several engineering applications.