|
Type of Installation /Load |
Approximately Resistance Value Required |
Soil Type/ Resistivity |
Earth System |
|
House hold earthing/3kA |
8 ohm |
Normal Soil/ up to 50 ohm-meter |
Single Growth Advance Chemical Earthing Electrode |
|
Sandy Soil/ between 50 to 2000 ohm- meter |
Single Growth Advance Chemical Earthing Electrode |
||
|
Rocky Soil/ More than 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Commercial premises, Office / 5kA |
2 ohm |
Normal Soil/ up to 50 ohm-meter |
Single Growth Advance Chemical Earthing Electrode |
|
Sandy Soil/ between 50 to 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Rocky Soil/ More than 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Transformers, substation earthing , LT line equipment/ 15kA |
less than 1 ohm |
Normal Soil/ up to 50 ohm-meter |
Single Growth Advance Chemical Earthing Electrode |
|
Sandy Soil/ between 50 to 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Rocky Soil/ More than 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
LA, High current Equipment./ 50kA |
less than 1 ohm |
Normal Soil/ up to 50 ohm-meter |
Single Growth Advance Chemical Earthing Electrode |
|
Sandy Soil/ between 50 to 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Rocky Soil/ More than 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
PRS, UTS, RTUs, Data processing centre etc./5KA |
less than 0.5 ohm |
Normal Soil/ up to 50 ohm-meter |
Single Growth Advance Chemical Earthing Electrode |
|
Sandy Soil/ between 50 to 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
||
|
Rocky Soil/ More than 2000 ohm- meter |
Multiple Growth Advance Chemical Earthing Electrode |
