GEM Ground Enhancement Material
Ground Enhancement Material (GEM) is a superior conductive material that solves your toughest grounding problems. It is the ideal material to use in areas of poor conductivity, such as rocky ground, mountain tops and sandy soil. GEM dramatically reduces earth resistance and impedance measurements. Furthermore, GEM may reduce the size of the grounding system where conventional methods are unsatisfactory. Once installed, GEM is maintenance-free, not requiring periodic charging or the presence of water to maintain its conductivity.
Third-party testing has been completed to verify that GEM conforms to IEC® 62561-7. This standard introduces a benchmark for electrical performance and corrosion of earth enhancement materials that has been absent from the industry to date.
nVent ERICO offers GEM Calculator software that provides resistivity values for common GEM applications and can help estimate the amount of GEM required for an installation. It operates in four languages - English, Spanish, French and German - and performs calculations in Imperial or Metric units. The GEM Calculator is available for download on our website at erico.com.
|Unit Weight||11.36 kg|
|Unit Weight||25 lb|
|Estimated Linear Feet of Ground Conductor Covering with Each Bag of GEM|
|Trench Width||Total Thickness of GEM|
|Parameter||Recommended Values||Test Method|
|Standards Compliance||Full compliance to IEC 62561-7 EPA Toxicity Characteristic Leaching Procedure (TCLP), test method 1311|
|Leaching||Arsenic < 1.5 mg/L, Barium < 60 mg/L, Cadmium < 0.15 mg/L, Chromium < 3.0 mg/L, Lead < 1.5 mg/L, Mercury < 0.06 mg/L, Selenium < 1.0 mg/L||EC 62561-7 EN 12457-2|
|Sulfur Content||< 2%||ISO 14869-1|
|Resistivity||<2 Ω-cm for powder <20 Ω-cm for mixed and cured material||Compressed powder according to ASTM G187-12 Mixed and cured per ASTM D991-89|
|Corrosion Performance||For copper-plated earth electrodes, the polarization resistance shall be > 8 Ω x m2 for aggressive environments For galvanized earth electrodes, the polarization resistance shall be > 7.6Ω x m2 for aggressive environments||IEC 62561-7, Sec 5.5, aggressive environment|
|Flexural Strength||300-450 psi [2070-3100 kPa]||ASTM C293|
|Compressive Strength||100-200 psi [690-1390 kPa] after 672 hours curing time||ASTM C109|
|Estimated Bags of GEM for Backfilling Around Ground Rods to a Density of 63.5 lb/ft ³ (1,017 kg/m³)|
|Diameter of Hole||ft||m||ft||m||ft||m||ft||m||ft||m||ft||m|
- nVent products shall be installed and used only as indicated in nVent's product instruction sheets and training materials. Instruction sheets are available at www.nvent.com and from your nVent customer service representative. Improper installation, misuse, misapplication or other failure to completely follow nVent's instructions and warnings may cause product malfunction, property damage, serious bodily injury and death and/or void your warranty.