Breakthrough Solution for Drilling or Earth Grounding - 0 views
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MiamiOH OARS on 08 Aug 17On installation of an electric utility pole with a transformer, a grounding electrode must be installed to meet the grounding criteria for safety reasons. In low-earth-resistance ground, e.g. clay, loam or sandy soil ground, a ground electrode can be installed with a simple driving method at low cost. In high-earth-resistance ground, e.g. gravel, cobble, or rock ground, however, special boring methods are required to drill to a depth from 4 m to 120 m to secure the earth resistance criteria. These methods are large-scale and expensive.