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Utility required appropriate grounding for a new substation including equipotential safety comprised of 4/0 ground grid at 24″ below grade was supplemented by a custom-made nVent ERICO 2′ x 4′ brazed mesh, covering 100% of the substation area.


The utility’s engineers typically use a mesh overlay in applications where they want assurance of a stiff ground grid to create a reliable equipotential surface. In this project, construction challenges required 20′ maximum width mesh bonded to the adjacent pieces of mesh, as well as bonding to the underlying 4/0 ground grid at regular intervals. Given the difference in conductor size and to ensure thorough bonding, connection to the underlying 4/0 grid was accomplished by unstranding the 4/0 ties so each strand could be individually connected to a different part of the overlying mesh using nVent ERICO Cadweld.


Custom nVent ERICO Ground Mesh and nVent ERICO Cadweld


The team’s quick responses and technical customization support, paired with short manufacturing lead-time, helped avoid construction delays and met the customer’s goals. Using nVent ERICO Cadweld for connecting mat to mat and mat to 4/0 strands reduced supervision and inspection time compared to silver solder field brazing.