Earthing is the process of creating an alternative path for the flow of fault/excessive
currents safely into the ground in the presence of minimal resistance or impedance.
The primary purpose of earthing is to reduce the risk of serious electric shock
from current leaking into uninsulated metal parts of an appliance, power tool, or
other electrical devices. In a properly earthed system, such leaking/fault current
is carried away harmlessly while tripping the fuse. Earthing also provides protection
from large electrical disturbances like lightning strikes and power surges. It also
aids in the dissipation of hazardous static electrical charges.
Although most electrical systems have fuses or circuit breakers for protection against
a fault current, the human body may be fatally electrocuted by a current of less
than one ampere which is well below the point at which a fuse or breaker will operate.
Earthing helps minimize such hazards from occurring.
Safe Earthing Electrode
It is a metal electrode which goes into the ground near the building. It helps in
the efficient discharge of all the fault currents/ surge currents present in the
electrical system. It also helps in dissipating the high voltages which are passed
on through the lightning arrestors atop buildings.
Back Fill Compounds
These are earth enhancement compounds which have different properties depending
on soil and other atmospheric conditions. Essentially, an ideal BFC has high electrical
conductivity, moisture capture and retention abilities and anti corrosive properties.
It works in tandem with the Safe Earthing Electrode. Together both form the efficient
It is a metallic device mounted at the highest point of the building to capture
lightning strikes and direct it to the earth via a safe path thereby preventing
it from flowing through the building's electrcial circuit. In the absence of the
lightning arrester a lightning strike could destroy electrical equipment and cause
harm to human life through electrocutions.