Earth resistance
Türkçe: Toprak direnci
The resistance an electrode presents to the surrounding soil; the lower it is, the more easily fault current flows into the ground.
// EXPLANATION
Earth resistance depends on soil resistivity (which varies widely with moisture, salinity, temperature and soil type) and on the length and shape of the electrode. It falls as rods get longer and the soil gets wetter. It is usually measured with the three-point fall-of-potential method, and a reading taken in a rainy season can be lower than one from a dry season.
// ALSO KNOWN AS
earth resistanceground resistancesoil resistivity
// RELATED TERMS
Earthing (grounding)An arrangement that connects the conductive parts of an installation to the ground through a low-resistance path so fault current has a safe way out.
Touch voltageThe voltage that appears between two points a person can touch at the same time (for example hand and foot) during a fault.
Electrical resistanceThe opposition a material offers to current flow; by Ohm's law R = V / I, measured in ohms.
