From Wikipedia, the free encyclopedia
Jump to: navigation, search

A groundbed is an array of electrodes, installed in the ground to provide a low resistance electrical path to ground or earth. A groundbed is a component in an earthing system.

Each electrode is called a ground rod or a earth electrode.

Grounding systems[edit]

For building electrical grounding systems or earthing systems there is a low resistance conductor bonding the metalwork and this is connected to a groundbed. The electrodes for electrical grounding are often called ground rods and are often made from steel with a copper clad surface – typically 1 to 2m long and 20 millimetres (0.79 in) in diameter. These are driven vertically into the ground and bonded together with bare copper wire.[1]

Soil conditioning[edit]

Some people install a Ufer ground around the ground rod to improve conductivity.

Some people use bentonite clay backfill around the grounding rod to improve conductivity.[2][3][4][5]


Marconite is Electrically Conductive Concrete and was developed specifically for use in :- A.Electrical Earthing Applications B.Anti Static Flooring C.Electro Magnetic Shielding It is Versatile & suitable for all types of soil:- Hilly terrain, Rocks or Granite, Sand or sandy soils, Salty terrains or sea shores, Water logged areas or River beds, Made up grounds. . Ultra low resistivity 0.001 Ω m . It is still 0.04 Ω m when mixed with cement, . Higher mechanical strength . Chemically inert – it’s ph is in neutral range . Does not corrode metal conductor . Conduction of current – Electronic Consistent performance which is unaffected by the change in environment or whether conditions. It does not dissolve, leach or gets swept away by ground water channels. It’s life is more than 50 years. No watering, maintenance or re-charging is required for life..hence Permanent Mr. Guglielmo Marconi and PMC Carbon jointly developed Marconite in 1972. Marconite was displayed to the world on UK’s technology program Tomorrow’s World in 1977. In 2002, James Durrans & Sons Ltd, UK bought the patent of Marconite and are manufacturer of Marconite. Above information collected by Vivek Saxena

Cathodic protection[edit]

In cathodic protection, the anode groundbed is the arrangement of anodes in the ground or water and it provides the path for protective current to leave the anodes and enter to electrolyte.[6]


  1. ^ Electrical Engineer's Reference Book, Sixteenth edition by M. A. Laughton CEng., FIEE and D. J. Warne CEng., FIEE, Newnes, 2003, ISBN 0 7506 46373
  2. ^ "Earthing".
  3. ^ Keith Switzer. "Achieving an Acceptable Ground in Poor Soil". 1998.
  4. ^ Roy Carpenter, Jr. and Joseph Lanzoni. "Designing For A Low Resistance Earth Interface (Grounding)". 2007.
  5. ^ W.R. Jones. [ "Bentonite Rods Assure Ground Rod Installation In Problem Soils"]. 1980. DOI: 10.1109/TPAS.1980.319556
  6. ^ NACE/ASTM G193 – 10a Standard Terminology and Acronyms Relating to Corrosion 2010