In electrical wiring, different types of insulation materials are used for the conductors based on their specific properties and applications. Two commonly used insulation materials are vulcanized Indian rubber (VIR) and polyvinyl chloride (PVC). These insulation materials are used as conductors in cleat wiring.

Cleat wiring is a type of surface wiring where the cables are fixed to walls or ceilings using cleats or clips. It is commonly used in industrial and commercial buildings where the wiring needs to be easily accessible and visible. Cleat wiring is known for its simplicity and ease of installation.

Now let's understand why VIR and PVC insulated wires are used as conductors in cleat wiring:

1. VIR Insulated Wires:
- Vulcanized Indian rubber (VIR) is a type of insulation material that was widely used in the early days of electrical wiring.
- VIR insulation has excellent electrical and thermal properties, making it suitable for conducting electricity safely.
- It is resistant to heat, oil, and chemicals, providing good protection to the conductors.
- However, VIR insulation is not suitable for outdoor or damp environments as it is not waterproof.

2. PVC Insulated Wires:
- Polyvinyl chloride (PVC) is a thermoplastic material commonly used for insulation in modern electrical wiring.
- PVC insulation has excellent electrical properties and is resistant to heat, moisture, chemicals, and abrasion.
- It is also flame retardant, which adds an extra layer of safety in case of a fire.
- PVC insulated wires are flexible and easy to handle, making them suitable for various wiring applications.
- These wires are available in different colors, allowing easy identification and organization of circuits in cleat wiring.

In cleat wiring, the VIR and PVC insulated wires are used as conductors to carry electrical current from one point to another. The wires are fixed to the walls or ceilings using cleats or clips, ensuring proper support and protection. Cleat wiring is commonly used in industrial and commercial buildings where the wiring needs to be visible and easily accessible for maintenance and troubleshooting purposes.

In conclusion, cleat wiring utilizes VIR and PVC insulated wires as conductors due to their excellent electrical properties, resistance to heat and chemicals, and ease of installation. These insulation materials provide the necessary protection and safety required for electrical wiring in various applications.