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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

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

Data Copied

Piedi lineari stimati del rivestimento del conduttore di terra con ciascun sacco di GEM
Larghezza trincea	Spessore totale di GEM
Larghezza trincea	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

Specifiche suggerite
Parametro	Valori raccomandati	Metodo di prova
Conformità agli standard		Piena conformità a IEC 62561-7 EPA Procedura di lisciviazione Procedura (TCLP), metodo di prova 1311
Lisciviazione	Arsenico < 1,5 mg/L, Bario < 60 mg/L, Cadmio < 0,15 mg/L, Cromo < 3,0 mg/L, Piombo < 1,5 mg/L, Mercurio < 0,06 mg/L, Selenio < 1,0 mg/L	EC 62561-7 EN 12457-2
Contiene zolfo	< 2%	ISO 14869-1
Resistività	<2 Ω-cm per polvere <20 Ω-cm per materiale miscelato e polimerizzato	Polvere compressa secondo ASTM G187-12 Miscelato e polimerizzato secondo ASTM D991-89
Prestazioni di corrosione	Per gli elettrodi di messa a terra rivestiti in rame, la resistenza alla polarizzazione deve essere > 8 Ω x m2 per gli ambienti aggressivi Per gli elettrodi di messa a terra zincati, la resistenza alla polarizzazione deve essere > 7,6Ω x m2 per gli ambienti aggressivi	IEC 62561-7, Sezione 5.5, ambiente aggressivo
Resistenza alla flessione	300-450 psi [2070-3100 kPa]	ASTM C293
Resistenza alla compressione	100-200 psi [690-1390 kPa] dopo 672 ore di polimerizzazione	ASTM C109

Sacchi stimati di GEM per riempimento intorno ai picchetti di terra a una densità di 63,5 lb/ft ³ (1,017 kg/m³)
Diametro del foro		ft	m	ft	m	ft	m	ft	m	ft	m	ft	m
Pollici	Centimetri	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