Electricity was an ever important discovery for mankind. Be it basic necessities to exquisite designs – electricity has a major role to play in every sphere of our lives. Several technological advancements in the type of appliances have come to the fore, and this keep on increasing day after day.
Electricity was born to serve man, its master. But with the current scenario of several mishaps and lack of preventions, there has been a strange and undesirable role reversal. The human body has chances of severe damage in case an electric current of 5 milliamperes passes through it within a rapid time span. In such a case if a person touches an appliance, which has heavy currents flowing through it, with his bare hands there are high chances of this encounter being fatal.
The electrical potential of the Earth is considered to be zero. Hence on connecting the electrical channels of any appliance to the Earth, its potential would become zero too. This is the main concept behind Earthing, which is a process bonding noncurrent bearing parts of an electrical device or the neutral summit of the electrical organization to the earth through wires possessing minor resistance to flow of current.
Types of Earthing for Houses:-
1. Pipe Type Maintenance Free Earthing
A 2 or 3 metre long pipe measuring about 58mm or 76mm in diameter is buried in the dig out pit along with growth advance backfill compound . The pipe is prefilled with growth advance hygroscopic gel to maintain conductivity. Pipe is provided with terminal for connection of equipment with earthing .
Various types of pipe earthing are as:-
A. Zinc Coated GI Pipe Earthing.
B. Zinc Alloy Coated GI Pipe Earthing.
C. Copper bonded pipe type Earthing .
2. Solid Rod Type Maintenance Free Earthing
A 2 or 3 metre long solid rod copper bonded around 250-300 microns & measuring about 17.2mm/20mm/25mm in diameter is buried in the dig out pit along with growth advance backfill compound . Rod is provided with terminal for connection of equipment with earthing .