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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

Pies lineales estimados de cubierta de conductor de puesta a tierra con bolsa de GEM
Ancho de zanja	Grosor total de GEM
Ancho de zanja	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

Especificaciones sugeridas
Parámetro	Valores recomendados	Método de prueba
Cumplimiento con las normas		Cumplimiento total con Toxicidad de la EPA IEC 62561-7 Lixivación característica Procedimiento (TCLP), método de prueba 1311
Lixivación	Arsénico < 1,5 mg/L, bario < 60 mg/L, cadmio < 0,15 mg/L, cromio < 3,0 mg/L, plomo < 1,5 mg/L, mercurio < 0,06 mg/L, elenio < 1,0 mg/L	EC 62561-7 EN 12457-2
Contenido de azufre	< 2 %	ISO 14869-1
Resistividad	<2 Ω-cm para polvo <20 Ω-cm para material mezclado y curado	Polvo comprimido de conformidad con ASTM G187-12 Mezclado y curado de conformidad con ASTM D991-89
Desempeño contra la corrosión	Para los electrodos a tierra con recubrimiento de cobre, la resistencia a la polarización debe ser > 8 Ω x m2 para ambientes agresivos Para electrodos a tierra galvanizados, la resistencia a la polarización debe ser > 7.6Ω x m2 para ambientes agresivos	IEC 62561-7, Sección 5.5, ambiente agresivo
Resistencia a la flexión	300-450 psi [2070-3100 kPa]	ASTM C293
Resistencia a la compresión	100-200 psi [690-1390 kPa] después de 672 horas de tiempo de curado	ASTM C109

Bolsas estimadas de GEM para llenar alrededor de las varillas de puesta a tierra, a una densidad de 1017 kg/m ³ (63,5 lb/ft³)
Diámetro del orificio		ft	m	ft	m	ft	m	ft	m	ft	m	ft	m
Pulgadas	Centímetros	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