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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.

Need technical support or a quote, we’re here to assist.

Details Application images Resources Video

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	11.360 kg
Unit Weight	25 lb

Data Copied

Metric | Imperial

每袋 GEM 覆盖的接地导体的预计直线英尺数
开槽宽度	GEM 总厚度
开槽宽度	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

推荐规格
参数	推荐值	测试方法
标准合规性		完全符合 IEC 62561-7 EPA 毒性特性溶出程序 (TCLP)，测试方法 1311
溶出	砷 < 1.5 毫克/升，钡 < 60 毫克/升，镉 < 0.15 毫克/升，铬 < 3.0 毫克/升，铅 < 1.5 毫克/升，汞 < 0.06 毫克/升，硒 < 1.0 毫克/升	EC 62561-7 EN 12457-2
硫含量	< 2%	ISO 14869-1
电阻率	粉末 < 2 欧姆-厘米混合及固化材料 < 20 欧姆-厘米	压粉符合 ASTM G187-12 根据 ASTM D991-89 混合和固化
腐蚀性能	对于镀铜接地电极，极化电阻应 > 8 欧姆 x 平方米（严苛环境下）对于镀锌接地电极，极化电阻应应 > 7.6 欧姆 x 平方米（严苛环境下）	IEC 62561-7，第 5.5 节，严苛环境
抗弯强度	300-450 磅/平方英寸 [2070-3100 千帕]	ASTM C293
抗压强度	100-200 磅/平方英寸 [690-1390 千帕] 672 小时固化时间后	ASTM C109

回填接地棒的 GEM 的预计袋数，密度 63.5 磅/平方英尺（1,017 千克/平方米）
孔直径		英尺	米	英尺	米	英尺	米	英尺	米	英尺	米	英尺	米
英寸	厘米	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