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The ground wire is used to:
1. give good regulations
2. avoid overloading
3. connect a circuit conductor or other device to an earth plate
4. give support to the towers

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Correct Answer - Option 3 : connect a circuit conductor or other device to an earth plate

Grounding:

  • In an electrical network, the circuitry which provides a path between the parts of the circuit and the ground is known as the grounding system.
  • The ground is essential for the reliable operation of the electrical equipment such as generator, transformer, Power system tower.
  • Electrical equipment must be grounded they are grounded in such a way that the equipment voltage will be the same as the ground and it is called as equipment grounding.
  •  In case of power transmission and distribution grounding is inevitable, the towers in the transmission system are grounded by an earth electrode.

Advantages:

  • Personal safety can be improved
  • Protection of Electrical equipment
  • Location of ground fault can be detected easily
  • Frequency of faults can be reduced
  • Lightning protection
  • Electrostatic accidents can be eliminated – static electric currents could create interference of electronic devices and it can generate fire near any flammable object but by using grounding method the static current can be released to the earth.
  • It can reduce electromagnetic interference
  • Reduction in maintenance cost and time

Important points:

Grounded conductor

A system or circuit conductor which will be intentionally grounded, it is also known as the grounded conductor on a neutral wye system.

Grounding conductor

It is a conductor which is used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes

Grounding electrode

It is a device which is used to establish an electrical connection to the earth

Grounding electrode conductor

It is a conductor which is used to connect the grounding electrode to the equipment grounding conductor, to the grounded conductor, or to both at the service

Grounding conductor equipment

It is the conductor which is used to connect the non-current carrying metal parts of the equipment

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