Erico GEM
Erico GEM
(OP)
Hi....
I have asked few questions about this grounding grid and it is still on going. We have decided to use Eric Ground Enhancing Meterial on the periphery of the ground grid. The ground grid is in the middle of the rock. Excavated and backfilled with granular B. I am just wondering, to acheive the full advantage of GEM it should be buried at least 2.5 ft below the grade while the grid should be 1.5 ft as per the traditional practice. I was wondering, what advantage this GEM will offer conceptually.
I would apprecaite your word.
Thanks
I have asked few questions about this grounding grid and it is still on going. We have decided to use Eric Ground Enhancing Meterial on the periphery of the ground grid. The ground grid is in the middle of the rock. Excavated and backfilled with granular B. I am just wondering, to acheive the full advantage of GEM it should be buried at least 2.5 ft below the grade while the grid should be 1.5 ft as per the traditional practice. I was wondering, what advantage this GEM will offer conceptually.
I would apprecaite your word.
Thanks






RE: Erico GEM
I used for many years a lot of Erico products as electrods and connectors but never GEM.
Try this link for more information.
http://www.erico.com/public/library/fep/LT0359.pdf
Best Regards
RE: Erico GEM
On the other hand, by reducing the relative resistance of the periphery, you may find that more of the fault current flows in the periphery than it would have without the GEM. This would negate some of the advantage but would require a detailed analysis to predict the full effect. You would have to have the ability to model the volume around the conductor at a different resistivity as the rest of the soil.