LT (Low Tension) and HT (High Tension) cable jointing kits are widely used in electrical distribution systems, underground cable networks, substations, industries, and power projects across India. These kits help in safe cable connection, insulation, moisture protection, and reliable power transmission.
LT and HT cable jointing kits are essential components used in electrical power distribution and underground cable systems across India. These jointing kits are specially designed to provide safe, reliable, and long-lasting cable connections for low tension (LT) and high tension (HT) applications. Industries, power plants, commercial buildings, electrical contractors, and utility companies widely use cable jointing kits for secure cable termination and insulation protection.
Heat shrink and cold shrink cable jointing kits are among the most popular types used in India due to their excellent insulation properties, moisture resistance, and easy installation process. LT cable jointing kits are generally used for cables up to 1.1 kV, while HT cable jointing kits are suitable for 11 kV, 22 kV, and 33 kV electrical systems. These kits help protect electrical cables from dust, water, corrosion, heat, and environmental damage, ensuring uninterrupted power supply and operational safety.
High-quality LT and HT cable jointing kits are manufactured using premium insulating materials that provide superior dielectric strength, thermal stability, and mechanical protection. They are commonly used in substations, underground cable networks, transformer installations, industrial plants, renewable energy projects, and electrical infrastructure developments throughout India.
Heat shrink kits are the most commonly used cable jointing kits in India. These kits use heat shrink tubes for insulation and sealing. They are suitable for underground and outdoor cable installations.
Applications:
LT XLPE cables
HT underground cables
Industrial power distribution
Voltage Range:
LT: Up to 1.1 kV
HT: 11 kV, 22 kV, 33 kV
Cold shrink kits use pre-expanded rubber sleeves that shrink automatically after installation. These are easy to install and ideal for moisture-prone environments.
Advantages:
Fast installation
No heating required
Excellent insulation performance
Straight through kits are used to connect two cables in a straight line while maintaining electrical continuity and insulation.
Common Use:
Underground cable extension
Power distribution systems
Industrial plants
Indoor termination kits are used for terminating LT and HT cables inside electrical panels, transformers, and switchgear rooms.
Suitable For:
Transformer panels
RMU panels
Indoor substations
Outdoor termination kits provide protection against rain, dust, UV rays, and environmental conditions. These are mainly used in outdoor substations and pole-mounted systems.
Resin Hardner Cable Jointing Kit use epoxy or polyurethane resin for insulation and waterproof sealing. These are preferred for underground and submerged cable applications.
| Type | Voltage |
|---|---|
| Heat Shrink LT Kit | Up to 1.1 kV |
| Resin Cast LT Kit | Up to 1.1 kV |
| Straight Through LT Joint | LT Underground Cable |
| LT Indoor Termination | Indoor Panels |
| LT Outdoor Termination | Outdoor Systems |
| Type | Voltage Range |
|---|---|
| 11 kV HT Jointing Kit | 11 kV |
| 22 kV HT Jointing Kit | 22 kV |
| 33 kV HT Jointing Kit | 33 kV |
| HT Indoor Termination | HT Panels |
| HT Outdoor Termination | Outdoor Substations |
National Power Industries is a trusted LT & HT Cable Jointing Kit Manufacturer & Supplier in India, offering premium quality cable jointing and cable termination solutions for electrical utilities, industrial plants, infrastructure projects, renewable energy, commercial buildings, and power distribution systems. Our cable jointing kits are manufactured using high-quality raw materials and advanced technology to provide reliable electrical insulation, superior mechanical strength, and long service life.
Our product range includes LT Cable Jointing Kit Resin Hardener, LT Cable Jointing Kit Heat Shrinkable, HT Cable Jointing Kit, HT Cable Straight Joint Kit, HT Cable Jointing Kit Indoor Type, and HT Cable Jointing Kit Outdoor Type. These products are widely used across India for underground cable installations, substations, industrial power systems, renewable energy projects, and utility distribution networks.

Our LT Cable Jointing Kit Resin Hardener is designed for reliable joining and protection of low-voltage underground power cables. The premium resin system provides excellent insulation, superior moisture resistance, and strong mechanical protection, ensuring safe and long-lasting cable performance in demanding operating conditions.
Our LT Cable Jointing Kit Heat Shrinkable provides dependable insulation and environmental sealing for low-voltage cable joints. Manufactured using advanced heat shrink technology, these kits ensure reliable cable protection, easy installation, and maintenance-free operation.
National Power Industries manufactures premium quality HT Cable Jointing Kits for medium and high-voltage cable applications. These kits provide superior electrical insulation, excellent mechanical protection, and reliable performance for critical power transmission and distribution networks.
Our HT Cable Straight Joint Kits are specially designed for joining high-voltage power cables while maintaining excellent electrical continuity, insulation performance, and mechanical strength. These kits are ideal for underground cable installations and utility power distribution systems.
Our HT Cable Jointing Kit Indoor Type is designed for switchgear panels, substations, transformer rooms, industrial facilities, and indoor electrical installations. The kits provide reliable insulation, compact design, and safe long-term performance.
Our HT Cable Jointing Kit Outdoor Type is engineered to withstand harsh outdoor environments including heavy rainfall, UV exposure, humidity, dust, and pollution. These kits ensure dependable cable protection and uninterrupted electrical performance throughout India.
National Power Industries has established itself as a reliable manufacturer and supplier of premium electrical products in India. Every cable jointing kit is manufactured under strict quality control procedures to ensure superior insulation, safety, and long-term reliability. Our products are trusted by electrical utilities, EPC contractors, industrial plants, and infrastructure developers across India.
An LT Cable Jointing Kit is used to safely join low-voltage power cables while maintaining reliable electrical insulation and mechanical protection.
HT Cable Jointing Kits are specially designed for medium and high-voltage cable systems to provide secure cable joints with excellent insulation and long service life.
Indoor kits are suitable for enclosed electrical installations, whereas Outdoor kits are designed to withstand harsh weather conditions, UV exposure, moisture, and pollution.
Yes. National Power Industries supplies premium quality LT & HT Cable Jointing Kits across India for utilities, industries, EPC contractors, and infrastructure projects.
Looking for a reliable LT & HT Cable Jointing Kit Manufacturer & Supplier in India? Contact National Power Industries today for premium quality cable jointing solutions, competitive pricing, expert technical support, and fast delivery across India.