Paper Insulated Copper Conductor

Durable Power: Rational’s Paper Insulated Copper Conductor

Have you ever been curious about the intricate components that make up our electrical systems? Explore the wonders of the Paper Insulated Copper Conductor (PICC) and delve deeper into transformers and other electrical giants. With their unique blend of strength and insulation, these Paper Insulated Copper Conductors form the backbone of some of the most potent electrical equipment. 

The Paper Insulated Copper Conductor (PICC), or as some call it, the Paper Insulated Copper Cable, keeps our world running smoothly, from powering our homes and businesses to advancing technological advancements.

In this blog post, we’ll look into the intricacies of paper insulated copper conductors (PICC), exploring their structure, types, and applications.

Understanding the Basics of Paper Insulated Copper Conductor

Imagine a rectangular ribbon of copper as thin as a credit card and as wide as your thumb. This is the core of a PICC, its strength and conductivity carrying the electrical current. But copper alone is a wild beast, needing to be tamed by insulation. And that’s where the paper comes in, not just any paper, but specially treated, high-performance paper.

At its core, a Paper Insulated Copper Conductor comprises a copper core surrounded by layers of insulation made from different paper types. Let’s break down the key specifications to get a better grasp of its design:

Conductor Dimensions

  • The width can range from 5 mm to 20 mm.
  • Thickness: Varied from 0.8 mm to 9 mm.
  • The periphery of Rectangular Conductor: Limited to a maximum of 50 mm.
  • Conductor Width to Thickness Ratio: Maintained at 10:1

Insulation Details

  • Insulation Thickness: Varies between 0.3 mm to 6 mm.
  • Insulation Types: Kraft Paper, Thermally Stabilised Paper, Diamond Dotted Epoxy Paper, Nomex, Polyester, and Mica.

Lapping Techniques

  • Types: Butt lapped, 30-50% overlapped, Interlocked, in various combinations of paper and tape widths, and customised based on customer requirements.

Types of Paper Insulated Copper Conductors

The versatility of PICCs extends beyond a one-size-fits-all approach. Manufacturers offer various types to cater to diverse needs:

Single Paper Covered Copper Conductor

It is ideal for applications requiring a simple yet effective insulation solution.

Twin Bunch Paper Covered Copper Conductor They are designed for enhanced conductivity and reliability in specific applications.

Triple Bunch Paper Covered Copper Conductor

This product provides improved reliability and performance for critical electrical systems.

Quadra Bunch Paper Covered Copper Conductor

Tailored for applications demanding higher power transmission.

Hexa Bunch Paper Covered Copper Conductor

This product is ideal for complex electrical setups, delivering high efficiency and durability.

Exploring Paper Types in PICCs

There’s a reason paper is chosen for this crucial role. It’s a remarkable, naturally insulating, flame retardant, and surprisingly strong material. Paper Covered Copper Conductor (PICC) paper comes in various types, each with its superpower:

Kraft Paper 

The classic, reliable workhorse offers excellent electrical and mechanical properties.

Crepe Paper 

Like a paper accordion, it provides tight bends and intricate windings flexibility.


A high-temperature champion, able to withstand scorching heat for extended periods.

Thermally Upgraded Paper (Green Colour)

Eco-friendly and boasting enhanced heat resistance, it’s a sustainable choice.

Paper Covered Copper Conductors in Action

Paper Insulated Copper Conductors find applications in various industries, including power generation, transmission, and distribution. Their versatility and reliability make them suitable for transformers, motors, generators, and electrical equipment.

These paper-clad heroes find their calling in various electrical equipment:


Paper Insulated Copper Conductors are a crucial component in power transmission systems. They are responsible for creating the coils that step up or down the voltage to ensure that your appliances get the exact amount of energy they need. These conductors are designed to provide a reliable and efficient means of transmitting electrical power while being safe and durable. They are made from high-quality, carefully selected materials to ensure superior performance and longevity. Whether you are using them in a residential or commercial setting, Paper Insulated Copper Conductors are an essential part of any power transmission system.

High-voltage motors and generators

Paper-insulated copper conductors are a vital component in the efficient flow of electricity, capable of handling high current loads in various applications. These conductors are widely used for industrial purposes, such as powering factories, and in the transportation sector, they are used to electrify trains and other forms of public transportation. Paper insulation in these conductors ensures they are safe, reliable, and efficient, making them an indispensable part of modern power distribution systems.

Traction equipment

Electric locomotives and trams are powered by a network of copper conductors that transmit electricity from the power source to the locomotive/tram. These copper conductors are insulated with high-quality paper material to ensure optimal performance and durability. This paper insulation protects the copper from damage and prevents the loss of electrical energy due to resistance. Overall, the combination of paper insulation and copper conductors allows electric locomotives and trams to operate efficiently and reliably, making them a popular choice for transportation in many countries around the world.

Beyond their technical prowess, Paper Insulated Copper Conductors offer distinct advantages:


The paper insulation is biodegradable, making it a greener choice than other conductors.


Compared to other options, Paper Insulated Copper Conductors provide a cost-effective solution without compromising performance.


With various paper types, lapping styles, and bunch configurations, Paper Insulated Copper Conductors can be tailored to specific needs.


To sum it up, the Paper Insulated Copper Conductor (PICC) is a remarkable example of engineering that combines copper’s conductivity with the insulation capabilities of various paper types. The intricate design and customizable options make Paper Insulated Copper Conductors essential in electrical engineering. As technology evolves, the requirement for efficient and reliable conductors will rise, further solidifying the role of Paper Insulated Copper Conductors as a critical component in electrical systems.

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