coated copper steel ground wire 1,copper layer average thickness than 0.25mm; 2 tensile strength than ... , exothermic welding powder, grounding electrode, GEM and so on. coated copper steel ground wire1, copper layer average thickness (conventional) ≥ 0.25mm; 2, tensile ... strength ≥ 600N/mm 2 3, flatness error ≤ 1mm 4, copper layer plasticity: grounding rods bent 30 º, the angle with no ...