Why are Electric Wires Covered with Plastic?

Here’s why are electric wires covered with plastic,

1. Insulation of current: The main purpose of the plastic covering is to insulate the wire. Copper or aluminum wires conduct electricity, and without insulation, touching the wire could result in electric shocks. Plastic prevents direct contact with the current.

2. Preventing short circuits: Bare wires touching each other can cause short circuits, leading to sparks, fires, or damage to electrical appliances. Plastic insulation ensures that wires carrying different currents stay separated and the electricity flows safely along its intended path.

3. Protection from moisture: Electrical wires can be exposed to moisture, rain, or humid environments. Plastic is water-resistant, preventing water from reaching the conductive metal inside. This reduces the risk of electric shocks and corrosion of the wire.

4. Durability and flexibility: Plastic coatings protect wires from physical damage such as cuts, abrasion, and bending. Flexible plastic makes wiring easier to install in homes, offices, and industrial setups without breaking the wire inside.

5. Chemical and heat resistance: Modern plastics are chosen for their resistance to chemicals, oils, and moderate heat. This ensures that wires remain functional even in demanding environments, maintaining safety over time.

6. Colour coding: Plastic coverings also allow wires to be colour-coded. This makes it easy to identify live, neutral, and earth wires, simplifying installation and reducing mistakes during electrical work.

Covering electric wires with plastic is a critical safety measure. It prevents shocks, short circuits, and wire damage while making the wires durable and easy to handle. Without plastic insulation, using electricity safely would be nearly impossible.

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I remember this once when my father was fixing our lamp at home. While replacing the wire, I noticed it was tightly coated in plastic. I thought, why are electric wires covered with plastic? When I researched, it turns out it is for a very practical reason, i.e., safety. I also came to know plastic acts as an insulator and it keeps the electricity flowing inside the wire. Without this covering, touching the wire results in dangerous shocks or even fires.

Why are Electrical Wires covered with Plastic Coating?

Here are some reasons I found during my research:

1. Safety: I found plastic insulation prevents accidental shocks if someone touches the wire. It ensures electricity stays contained within the wire.

2. Prevents Short Circuits: My father also informed me that exposed wires can touch each other, causing a short circuit. Plastic coverings prevent this from happening.

3. Durability: Plastic protects wires from moisture, heat, and wear and tear, making them last longer.

4. Fire Resistance: Many types of plastic used in wires are flame-resistant, adding an extra layer of safety.

Once I understood why electric wires are covered with plastic, I realised how important that plastic layer is in making electrical systems safe.

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Also Read: 

Why are Electric Wires Coated with PVC

It's actually pretty easy to guess. I remember in my science class I was asked this question in every damn exam. I have perfected the explanation on why are electric wires covered with plastic. 

The simple answer is that plastic is a bad conductor of electricity. 

Okay let us understand in detail why do electrical wires have a plastic covering.

Imagine you hold a live wire in your hand which is not covered in plastic. What will happen? You will get a shock or there are chances of electrocution. To avoid all of this, a plastic covering is placed on electric wires. This covering prevents the current to flow outside the system.

Plastic is non-reactive material made by polymerization of small organic molecules having higher molecular weight. Another reason for using plastic to cover electric wires is that they are flexible and durable. And of course, it is reasonably priced.

I hope this resolves your query why are electric wires covered with plastic.