Some Basics of System Grounding

Grounding electrodes exist in a wide variety of forms, beginning with the most commonly recognized, the single driven rod. Progressively more elaborate structures are basically for the purpose of redundancy: two rods are better than one, whether coupled end-to-end or paralleled, and this principle can be implied ad infinitum. The result can be large grids or interconnected structures of complex design. This article will examine some of the fundamentals regarding substation, transmission line, and distribution grounding.