The computation of its characteristics and the design of the earthing system for various kilo voltage (KV) substations is very important. Substation performance must be effective and adequate for the complete power system to operate successfully. Thus, substations in general may be thought of as the beating heart of the entire power system. The problem arises in the design earthing substation a grounding design must offer a method to transfer electric currents into the ground both under standard and faulted situations to be considered safe. Hence the mathematical formulas will be required to fulfill electrical safety and power distribution performance calculations and requirements. Expected touch as well as step voltage values, safe touch, including ground potential increase. In this paper, the author discussed the design of the earthing system and its parameters to be considered for earthing of the substation. To achieve national and international requirements, it was concluded that perhaps the design of an earthing system is quite intricate and requires exacting calculations of parameters. Future earthing systems must be built to be 100% available for the duration of the substation. A substation's earthing systems should have a minimum expected lifespan of 40 years.