Varying compositions of stoneware clay, fire clay, feldspar and quartz were used to produce different specimens of porcelain insulators to investigate their resulting properties and suitability for mass production and commercial viability, comparing the specimens with Budnikov’s recommendation for electrical porcelain. The basic raw materials were separately prepared using a sieve to remove the iron content and other impurities before casting. The mixtures were formulated to produce porcelain samples by using sodium silicate to keep it in a slurry state, while the slip casting process was used in the production of the electrical porcelain insulator. Produced insulator samples were fired by means of bisque and glaze firing techniques respectively. The specimen with composition of 50% stoneware clay, 20% feldspar and 30% quartz (silica) was found to possess a high quality properties, corresponding to water of absorption (14.44%), porosity (25.23%), bulk density (1.75 g/cm3) at a very high temperature of 1200⁰C, with appreciable insulation breakdown voltage of 45V. The investigation had shown that high quality electrical porcelain insulators could be achieved from locally available sourced materials for distribution line insulators.