GEM Ground Enhancement Material
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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.
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Details
Application images
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Resources
Video
Features
- Maintains constant resistance for the life of the system once in its set form
- Performs in all soil conditions even during dry spells
- Does not require periodic charging treatments or placement
- Does not require the continuous presence of water to maintain its conductivity
- Fully sets within 3 days, fully cures within 28 days
- Does not dissolve, decompose, or leach out with time
- Non-corrosive
- Reduces vandalism and theft since conductors are hard to remove from concrete
- Easy-to-handle 25 lb (11.3kg) bags or buckets
- Requires only one person to install
- Exceeds IEC® 62561-7 which sets the benchmark for corrosion, leaching, sulfur content, and other environmental regulations
- Complies to the U.S. Environmental Protection Agency (EPA) Toxicity Characteristic Leaching Procedure (TCLP), EPA test method 1311
- Can be installed using trench or ground rod backfill methods
Specifications
| Unit Weight | 11.36 kg |
| Unit Weight | 25 lb |
| Beräknad längd i fot av jordningsledare som täcks per GEM-säck | |||
| Dikesbredd | Total tjocklek av GEM | ||
| 10.2 cm | 12.7 cm | 15.2 cm | |
| 10 cm | 1.0 m | 0.8 m | 0.7 m |
| 15.2 cm | 0.7 m | 0.5 m | 0.4 m |
| 20.3 cm | 0.5 m | 0.4 m | 0.3 m |
| 25.4 cm | 0.4 m' | 0.3 m | 0.3 m |
| 30.5 cm | 0.3 m | 0.3 m | 0.2 m |
| Föreslagna specifikationer | ||
| Parameter | Rekommenderade värden | Provningsmetod |
| Standarduppfyllande | Uppfyller helt IEC 62561-7 EPA toxicitet Karakteristisk urlakning Procedur (TCLP), provningsmetod 1311 | |
| Urlakning | Arsenik <1,5 mg/l, Barium <60 mg/l, Kadmium <0,15 mg/l, Krom <3,0 mg/l, Bly <1,5 mg/l, Kvicksilver <0,06 mg/l, Selen <1,0 mg/l | EC 62561-7 EN 12457-2 |
| Svavelinnehåll | <2 % | ISO 14869-1 |
| Resistivitet | <2 Ωcm för pulver <20 Ωcm för blandat och härdat material | Komprimerat pulver enligt ASTM G187-12 Blandat och härdat enligt ASTM D991-89 |
| Korrosionsegenskaper | För kopparbelagda jordelektroder skall polariseringsresistansen vara >8 Ωm2 för aggressiva miljöer För galvaniserade jordelektroder skall polariseringsresistansen vara >7,6 Ωm2 för aggressiva miljöer | IEC 62561-7, kap. 5.5, aggressiv miljö |
| Böjhållfasthet (sträckgräns) | 2 070–3 100 kPa [300–450 psi] | ASTM C293 |
| Tryckhållfasthet | 690–1 390 kPa [100–200 psi] efter 672 timmars härdningstid | ASTM C109 |
| Beräknat antal GEM-säckar för fyllning omkring jordningspett till en densitet av 1 017 kg/m³ (63.5 lb/ft³) | |||||||||||||
| Håldiameter | ft | m | ft | m | ft | m | ft | m | ft | m | ft | m | |
| Tum | Centimeter | 5 | 1.5 | 6 | 1.8 | 8 | 2.4 | 10 | 3 | 15 | 4.6 | 20 | 6.1 |
| 4 | 10.2 | 2 | 2 | 2 | 3 | 4 | 5 | ||||||
| 6 | 15.2 | 3 | 3 | 4 | 5 | 8 | 10 | ||||||
| 8 | 20.3 | 5 | 6 | 8 | 9 | 14 | 18 | ||||||
| 10 | 25.4 | 7 | 9 | 12 | 14 | 21 | 28 | ||||||
| 12 | 30.5 | 10 | 12 | 16 | 20 | 30 | 40 | ||||||
Brochure
Catalog
Data Sheet
Installation Manual / Instruction Sheet
Safety Data Sheet
Technical Handbook
Certifications
DoC, ERICO GEM
English
EN IEC 62561-7:2018
- Warning
- 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.
WARNING: This product can expose you to chemicals including silica and hexavalent chromium, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.