Question

The main purpose of earthing in electrical installation is

• A. To increase voltage
• B. To reduce power consumption
• C. To provide safety against electric shock
• D. To increase current rating

Hint:

Earthing protects users by providing a low resistance path for fault current to flow safely into the ground.

Answer 1

The Correct Option is C

Concept: Earthing means connecting the metallic body of electrical equipment to the earth through a low resistance path.

Step 1: If insulation fails, the metallic body of an appliance may become live.

Step 2: If a person touches such equipment, current may pass through the human body.

Step 3: Earthing provides an easy and low resistance path for leakage current to flow into the ground.

Step 4: This prevents electric shock and protects both human beings and electrical equipment. Therefore, the purpose of earthing is: \[ \boxed{\text{To provide safety against electric shock}} \]