Question

Give reasons for the following: The wires carrying current in homes have a coating of PVC.

Hint:

PVC = Insulator. Copper = Good conductor and corrosion resistant.

Answer 1

Reason: The Wires Carrying Current in Homes Have a Coating of PVC

The electrical wires used in homes are coated with PVC (Polyvinyl Chloride) because PVC acts as a good electrical insulator and provides safety as well as protection.

Detailed Explanation:

1. PVC is a Good Electrical Insulator:
PVC does not allow electric current to pass through it easily. Since it is a non-conductor of electricity, it prevents electric shocks when we touch the outer surface of the wire.

2. Prevents Short Circuits:
The PVC coating prevents direct contact between two wires. Without insulation, wires may touch each other and cause short circuits, which can lead to fire hazards.

3. Heat and Fire Resistance:
PVC has good heat-resistant properties and does not catch fire easily. This makes it safe for household electrical use.

4. Protection from Moisture and Damage:
PVC protects the metal wire (usually copper or aluminium) from moisture, corrosion, and physical damage.

5. Flexible and Durable:
PVC is flexible and long-lasting, which makes the wires easy to handle and suitable for long-term use.

Conclusion:
The wires carrying current in homes are coated with PVC because it acts as an excellent electrical insulator, prevents electric shocks and short circuits, and provides safety and durability.