Electrical Earthing Design Solutions in Rock

Low-Impedance Earthing (Grounding) for problem soils including rockChem-rod Earth Electrodes - Earthing in Rock

When facing a electrical earthing design with problem geology, we have a solution that we feel will make your life easier when designing & dealing with High Voltage & Low Voltage electrical earthing system design compliance.

The problem? ...

Granite, millstone, siltstone, sandstone, limestone and mudstone!  All rock formations found in your area ... and all types of rock that have a high electrical resistivity – a real headache when designing/installing a High Voltage & Low Voltage electrical earthing system.

The Answer? ... Chem-rod™

When installed the Chem-rod saturates the interfacing cylinder with naturally occurring electrolytes to solve even the most challenging of sites.

A certain National Utility were so impressed, they invested in a 5 year evaluation with amazing results ... up to 10 times the reduction in resistance when compared with traditional electrodes.

Applications

Chem-Rod

Efficient electrical earthing systems reduce the risk of electrical arcing and fires. The Chem-Rod improves reliability for many applications, including:

  • Lightning protection systems
  • Prevention of accidents caused by static charge and stray currents
  • Protection of central communications, electronics, and AC power systems
  • Meeting grounding safety requirements for electrical substations
  • Ground fault neutralization
  • Safeguarding critical instrumentation and process-control equipment

Click here to request a quote or more information.

The Chem-Rod uses advanced engineering to achieve a consistent, low-impedance electrical connection with the earth, even in unfavourable and varying ground conditions (like permafrost).

  • Large surface area: The wider 25/8 inch diameter provides a larger surface area for a better connection to the earth.
  • Electrolytic salts: In the presence of moisture, these salts dissolve and seep out of leach holes along the electrode. The salts continually increase the soil’s conductivity, further reducing impedance and resistance.
  • Soil augmentation: Ground Augmentation Fill (GAF) is a combination of organic soil materials which optimize the conductivity of the soil around the Chem-Rod. In- creasing the amount of GAF can decrease the overall system resistance, increasing the system efficiency.
  • Easy refills: Every Chem-Rod comes with a standard removable cap and access cover for easy maintenance of the ground salt charge.
  • Optimised pigtail: The 2-foot long, 90mm2 stranded pigtail is exothermically welded to the body of the Chem-Rod.
  • Easy refills: Every Chem-Rod comes with a standard removable cap and access cover for easy maintenance of the ground salt charge.
  • Optimised pigtail: The 2-foot long, 90mm2 stranded pigtail is exothermically welded to the body of the Chem-Rod.
Standard Variations
Length 8’ and 10’ UL listed Custom lengths (non UL listed)
Vertical or horizontal Custom shapes
Material Copper Cu (Sn coated)
Manf'r LEC Inc LEC Logo

chem-rod brochure - Electrical earthing in Rock

Chem-Rod - Electrical Earthing in Rock

LEC Logo

"Working with GreyMatters has totally changed my expectations of a professional engineering consultancy firm … for the better! Technically, they were on the money! More importantly however ... they kept me updated throughout the entire project, which was so refreshing, and therefore quickly put my mind at ease that things were being taken care of." (C. Turgis)
  • subsea 7
  • Atkins
  • Siemens
  • Hydro66
  • Western Power Distribution
  • National Grid
  • BAM Nuttall
  • Rotary Building Services
  • M&W Group
  • Valero
  • Technip
  • Royal Airforce
  • PM Group
  • MOD
  • ISG
  • Ineos
  • Exelis
  • Essar
  • Deerns
  • Network Rail
  • AWE