Prabha Power

HT and LT Cables: Types, Applications and Advantages

The world today is largely dependent on the need for reliable and efficient electrical power distribution. Also, it is more critical than ever to have the most efficient system of cables for electrical power distribution. The role of High-Tension (HT) and Low-Tension (LT) cables is pivotal in ensuring seamless electricity supply. This blog explores the world of HT and LT cables, elaborating on their types, applications, advantages, and the essential role they play in our day-to-day activities.

What Are HT and LT Cables?

In simple words, High-Tension and Low-Tension cables are electrical conductors that are suitably designed for different voltage levels. Moreover, HT cables are engineered to handle high-voltage transmission. On the other hand, LT cables are suitable for low-voltage distribution.

The Importance of HT and LT Cables

Efficient and quality HT and LT cables are the lifeline of the electrical distribution network. Thus, they ensure the safe and efficient transfer of electricity from power stations to our residences, workplaces, and industries. These power distribution cables are crucial for maintaining a steady power supply. Moreover, it ensures our modern lifestyle is uninterrupted.

Types of HT and LT Cables

HT Cables

The primary application of High-tension cables is for transmitting electricity over long distances. Therefore, they are designed to always withstand high voltages. So, these cables are usually found in overhead transmission lines.

LT Cables

Our homes and business establishments are largely dependent on Low-Tension cables, for distribution of electricity. These types of cables operate at lower voltages, making them ideal for local power distribution.

HT and LT Overhead Line Material

The choice of materials is extremely crucial for overhead electrical transmission, Therefore, HT and LT overhead lines use materials that can withstand all types of environmental factors and harsh conditions.

Key Components of HT and LT Cables

The composition of HT and LT cables consists of several essential elements, including:

  • Conductors: These play an important part in carrying the electrical current.
  • Insulation: Provides barrier and protection against electrical leakage.
  • Armour: Enhances the barrier of mechanical protection.
  • Sheath: This adds an extra layer of protection.

Installation and Maintenance of HT and LT Cables

It is mandatory to ensure proper installation and regular maintenance of HT and LT cables. Also, these factors are critical for ensuring the longevity and efficiency of HT and LT cables. Moreover, any negligence in these aspects can lead to frequent power disruptions and safety hazards.

HT and LT Cable Testing

It is essential to schedule regular testing of HT and LT cables to detect potential faults and ensure reliability. Also, reliable testing procedures help in identifying and rectifying any issues before they escalate.

Advantages and Disadvantages


  • HT and LT cables are highly efficient.
  • They provide a reliable power supply.
  • These cables are durable and long-lasting.


  • HT and LT cables can be expensive to install.
  • They require periodic maintenance.

Applications of HT and LT Cables

HT and LT cables find applications in various sectors, including residential, commercial, and industrial. They are used in power distribution, underground cabling, State Discoms, Railways, PWD, CPWD and more

Choosing the Right HT and LT Cables

Considering the mentioned factors, the selection of the appropriate cables is extremely important. Also, crucial factors such as voltage requirements, environmental conditions, and load capacity play a pivotal role. 

Your Trusted Source for HT and LT Cables

When it comes to purchasing HT and LT cables, Prabha Power stands out as the ideal choice for several compelling reasons. Prabha Power, a unit of Prabha & Associates, has been a prominent player in the industry since its establishment in 1975. They specialise in offering a diverse range of Power Transmission Cables, Conductors, and associated accessories. Thus, making them a top-notch provider in the field of power transmission solutions.

Difference between HT and LT cables

When dealing with electrical cables, you may come across HT (High Tension) and LT (Low Tension) varieties. What exactly is the difference between the two? In simple terms:

  • HT cables are designed to withstand higher voltages, typically 11kV and above. They have thicker insulation and conductors. LT cables are rated for up to 1.1kV and have thinner insulation and conductors.
  • HT cables are primarily used for power transmission over long distances, such as from power plants to substations. LT cables are used for power distribution locally, like in homes and buildings.
  • The conductors in HT cables are made of materials like aluminium and copper. LT cables often use copper conductors.
  • HT cables are costlier than LT cables due to the need for extra insulation and materials that can handle higher power. LT cables are more economical.
  • HT cable joints need to be carefully made to ensure effective insulation at high voltages. Joints are simpler for LT cables.
  • Fault detection and maintenance is more complex for HT cables due to safety concerns. LT cables are easier to monitor and fix.

HT cables are designed for high voltages across long distances, while LT cables are meant for lower power distribution over shorter distances. HT cables are bulkier, more expensive and require extra safety precautions. LT cables are lighter, cheaper and easier to install and maintain.


Prabha Power is the ultimate destination for those seeking HT and LT cables and associated accessories. Their commitment to quality, technological advancement, extensive product range, and unwavering dedication to quality control make them the go-to choice for all your power transmission needs. Therefore, when you choose Prabha Power, you’re not just buying cables; you’re investing in reliability and efficiency for your electrical projects.

HT and LT cables are the backbone of our modern power distribution systems. They ensure that electricity reaches us efficiently and safely. Choosing the right cables and conducting regular maintenance is essential for uninterrupted power supply. When it comes to choosing reliable cables, Prabha Power is the name you can trust. To learn more about quality HT and LT Overhead Line Material, please feel free to contact us.