Optimal Safety Earthing – Earth Electrode Sizing Using A Deterministic Approach

Abstract

In this paper a deterministic approach in the sizing of earth electrode using the permissible touch voltage criteria is presented. The deterministic approach is effectively applied in the sizing of the length of earth rod required for the safe earthing of residential and facility buildings. This approach ensures that the earthing design is not only safe and effective but also reduces wastages in both material and labour.

Keywords: step voltage, touch voltage, soil enhancer, earth electrode resistance, embedded earth electrode.