Earth PIT Testing's

The Earth faults are hazardous and hence need proper earthing to prevent fault current from entering into anybody or metallic object. The purpose of earthing is to minimize the effect of transient voltage that occurred due to a strike of lightning.

How is earth resistance measured?

Earthing connections are made by driving the earth electrode into several places. An earth electrode consists of a metal pipe or conducting plate connected to the earth.

There are different materials used in the making, such as copper, aluminum, steel or galvanized iron. Various factors affect the earth resistance, like the composition of the soil, temperature, moisture content and depth of electrode. Earthing enables leakage current to flow away safely and is linked to an automatic cut off device (which ensures power supply). There are different components included in an earthing system like earth electrodes, main earth terminals or bars, earthing conductors, protective conductors, equipotential bonding conductors, electrically independent earth electrodes (for measurements), termination fittings, bonding, welding kits and other materials.