20 Questions
What is the purpose of plate earthing?
To provide a low resistance path for the dissipation of fault current to the ground
What materials are commonly used for plate earthing?
Galvanized iron or copper
How is rod earthing accomplished?
By burying a copper rod or galvanized steel/iron pipe vertically underground
What is the purpose of earthing through the water main?
To use the water main pipe for earthing and minimize resistance for earthing connection
What is the function of charcoal and salt in earthing?
Charcoal maintains humidity and increases conductivity, while salt reduces the resistance to the dissipation of electricity
What is the purpose of earthing in electrical systems?
To protect the operating personnel, maintain line voltage constant, protect equipment, and protect buildings and machines against lightning.
What is the difference between earthing and grounding?
Earthing protects humans from electrocution and contains zero potential, while grounding protects the entire power system from malfunctioning and does not possess zero potential.
How does earthing protect against damage to electrical systems and equipment?
The leakage current chooses a simple low resistance path to flow, protecting the electrical system and equipment from damage.
What is the significance of the color of the wires used in earthing and grounding?
The earth wire used in earthing is green in color, while the wire used for grounding is black in color.
What are the four main necessities of earthing in electrical systems?
To protect operating personnel, maintain line voltage constant, protect equipment, and protect buildings and machines against lightning.
What is the zero potential referred to in earthing?
The ground
What is the main purpose of grounding in the context of electric systems?
To protect the entire power system from malfunctioning
How does earthing protect electrical systems and equipment?
By providing a low resistance path for leakage current to flow directly to the ground
Under what condition is grounding primarily used?
Unbalancing when the electric system overloads
What is the color of the wire used for grounding?
Black
What are the dimensions for a galvanized iron plate used in plate earthing?
60cmX60cmX6.35mm
What is the diameter of the pipe used in pipe earthing for normal soil?
40mm
What is the minimum depth of the trench for burying the strip electrode in strip or wire earthing?
0.5m
What is the diameter of the copper rod used in rod earthing?
12.5mm
What is the purpose of using earthing clamps in earthing through the water main?
To minimize the resistance for earthing connection
Test your knowledge about earthing in electrical systems, which involves connecting non-current carrying part of the equipment or neutral supply system to the ground to protect against damage and provide a zero potential reference. Understand the necessity and purpose of earthing in electrical engineering.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
