An "Earthing PPT" presentation describes the process of connecting electrical equipment to the earth via low-resistance conductors to provide a safe path for fault currents, protect personnel from electric shock, safeguard equipment from overvoltages, and dissipate lightning strikes.

1. Earthing
Class 8 Presentation
Science - Safety in Electricity

2. What is Earthing?
• Earthing is the process of connecting electrical
devices to the ground.
• It provides a safe path for electric current to
flow into the earth.
• It prevents electric shocks and damage to
appliances.

3. Why is Earthing Important?
• Protects us from electric shocks.
• Prevents fire hazards caused by leakage of
current.
• Protects electrical appliances from damage.
• Ensures safe use of electricity in homes and
industries.

4. Types of Earthing
• 1. Plate Earthing - using copper or galvanized
iron plates.
• 2. Pipe Earthing - using GI pipes vertically in
the ground.
• 3. Rod Earthing - using copper/steel rods
driven into earth.

5. How is Earthing Done?
• A pit is dug and filled with salt and charcoal for
conductivity.
• Metal plate/pipe is placed in the pit and
connected with wires.
• The wire is connected to the electrical system.
• This ensures leakage current flows safely into
the earth.

6. Safety Benefits of Earthing
• Saves lives by preventing electric shocks.
• Protects buildings and equipment from
lightning.
• Improves reliability of electrical systems.
• Mandatory safety practice in all electrical
installations.

7. Real-Life Examples
• 3-pin plugs have an earthing pin for safety.
• Earthing in washing machines, refrigerators,
and computers.
• Lightning arresters in tall buildings use
earthing systems.
• Electric poles and transformers are always
earthed.

8. Summary
• Earthing = safety system in electricity.
• Prevents shocks, fires, and equipment
damage.
• Different methods: Plate, Pipe, Rod.
• Essential for safe and reliable electricity use.