What is earth wire ? How it works in our domestic circuit ?
What is earth wire ? How it works in our domestic circuit ?
The earthing wire is the conductor that connects the power system to the earth. It connects the power system’s ground bus to the best available ground potential source, usually the water service, but whatever else might be available such as steam pipe, or driven ground rod (less desirable).
The ground bus is subsequently connected to the system’s neutral bus by the bonding jumper, forming a grounded neutral system. The purpose is to have two conductors to each piece of equipment, first the current carrying neutral and the other the green ground safety conductor.
At each piece of equipment or appliance, the ground conductor is connected to the frame and the neutral conductor connected to the equipment’s electrified internal workings. The function of this system is to provide a normal separate conductor, the neutral, to return operating current to the electrical system after going through the electrified part of the equipment.
The separate ground conductor is there to create a return path from the frame of the equipment, such that any accidental connection between phase conductor and the frame or housing is short circuited to the system neutral, thus denergizing the equipment for safety of personnel.
We can receive an electric shock on touching a running appliance. This is caused by the leakage of current from the appliance. Earthing provides a safety measure against the electric shock, caused by the leakage of current. Thats why a third wire (Earth wire) is used in domestic wiring.
Sometimes, the insulation of a live wire burns due to excessive heating. A naked live wire may lead to an electrical shock. To protect the appliance against an electrical shock, its metallic case is connected with the Earth wire.
The earthing wire is the conductor that connects the power system to the earth. It connects the power system’s ground bus to the best available ground potential source, usually the water service, but whatever else might be available such as steam pipe, or driven ground rod (less desirable).
The ground bus is subsequently connected to the system’s neutral bus by the bonding jumper, forming a grounded neutral system. The purpose is to have two conductors to each piece of equipment, first the current carrying neutral and the other the green ground safety conductor.
At each piece of equipment or appliance, the ground conductor is connected to the frame and the neutral conductor connected to the equipment’s electrified internal workings. The function of this system is to provide a normal separate conductor, the neutral, to return operating current to the electrical system after going through the electrified part of the equipment.
The separate ground conductor is there to create a return path from the frame of the equipment, such that any accidental connection between phase conductor and the frame or housing is short circuited to the system neutral, thus denergizing the equipment for safety of personnel.
We can receive an electric shock on touching a running appliance. This is caused by the leakage of current from the appliance. Earthing provides a safety measure against the electric shock, caused by the leakage of current. Thats why a third wire (Earth wire) is used in domestic wiring.
Sometimes, the insulation of a live wire burns due to excessive heating. A naked live wire may lead to an electrical shock. To protect the appliance against an electrical shock, its metallic case is connected with the Earth wire.
