Mineral Insulated Cables

Precision Engineered for Extreme Environments

At DOMADIA™, we take pride in our world-class manufacturing capabilities for producing Mineral Insulated (MI) cables. Engineered to perform under the most demanding conditions, our MI cables combine the highest-grade materials with advanced manufacturing to deliver unmatched durability, safety, and performance.

These metal-sheathed, fire-resistant cables are designed for extreme industrial environments where traditional cable systems fail. From intense heat to high radiation, DOMADIA™ MI cables provide reliability where it matters most.

Types of MI Cables

1. Mineral Insulated Thermocouple Cable:

Used for temperature measurement, these cables have thermocouple wires insulated with MgO and a metal sheath.

2. Mineral Insulated RTD Cable:

Similar to thermocouple cables, these are used for resistance temperature detection, offering high temperature resistance and durability.

3. Mineral Insulated Heating Cable:

Designed for heating applications, these cables feature a heating element encased in mineral insulation and a metal sheath, suitable for high temperature and high wattage applications.

4. Mineral Insulated Power Cable:

Used for power and control circuits in critical applications, these cables have copper conductors, a solid copper sheath, and MgO insulation for fire safety.

5. Mineral Insulated Coaxial/Triaxial Cable:

These cables are used for data transmission and have a central conductor, a dielectric layer, and a metal sheath.

6. Mineral Insulated Self-Powered Neutron Detectors (SPNDs):

Used in nuclear reactors to measure neutron flux.

7. Flexible Mineral Insulated Cables: 

These offer more flexibility, often with a copper or aluminum sheath and MgO insulation, suitable for various industrial applications.

Applications of DOMADIA™ Mineral Insulated Cables

Engineered for Reliability Across Critical Sectors

DOMADIA™ MICC cables are designed to deliver uncompromising performance in the most challenging environments. Their ability to withstand extreme temperatures, resist fire, and maintain structural integrity under pressure makes them a trusted solution across a wide range of industries.

High-Temperature Industrial Applications

DOMADIA™ MICC cables perform reliably in environments above 1000°C. They’re ideal for metal heat-treating, sintering, and ceramic firing.Their strength and thermal stability ensure long-term use in extreme heat.

Nuclear & Petrochemical Industries

Engineered for harsh conditions, these cables resist radiation and chemicals. Used in nuclear reactors and petrochemical plants for safety-critical systems. They offer robust, fail-safe performance in hazardous areas.

Precision Temperature Sensing

Perfect for thermocouples and RTDs in sensitive applications. Used in chemical plants, HVAC systems, and power stations. They provide stable and accurate temperature readings.

Industrial & Building Power Systems

Ideal for critical power in hospitals, data centers, and factories. Strong, maintenance-free, and highly durable over time. Ensure continuous operation in vital systems.

Transportation & Infrastructure

Used in tunnels, metros, airports, and railway networks. Fireproof and low-smoke for safe, enclosed space installations. Withstand vibration, moisture, and heavy-duty use.

Hazardous & Explosive Environments

Safe for areas with flammable gases or corrosive chemicals. Used in chemical plants, oil refineries, and offshore sites. Metal sheathing ensures unmatched protection and reliability.

Fire protection systems

Fire alarm systems: Ensuring alarm systems remain operational during a fire. This includes fire alarm systems in high-rise buildings.

Emergency lighting: Maintaining power to emergency lighting circuits to guide occupants safely during emergencies and ensure the lighting is functional during the fire.

Sprinkler systems: Powering the control systems of fire suppression sprinklers.

Hazardous locations

Chemical and petrochemical plants: Operating in corrosive environments with explosive atmospheres and high-temperature environments like furnaces and kilns.

Oil and gas industry: Used in offshore rigs and refineries where high reliability and safety standards are required. Used in environments where explosive gases, dust, or vapours are present, ensuring safe and reliable electrical connections.

Building and construction

Critical infrastructure: Wiring in hospitals, airports, tunnels, and other critical infrastructure.

Historical buildings: Retrofitting old buildings with fire-resistant wiring without compromising architectural integrity.

Transportation

Railways and subways: Providing reliable power and control wiring in underground and elevated transit systems, as well as lighting systems.

Marine applications: Used in ships and offshore platforms where exposure to harsh marine environments and corrosion is common. It is also used to connect warning systems at sea and on oil tankers in extreme conditions.

Specialized equipment

Medical devices: Ensuring the reliability of sensitive medical equipment and systems.

Instrumentation and control: In precision instruments that require stable and reliable electrical connections.

Renewable energy

Solar power plants: Used in solar power installations where reliability and longevity are crucial.

Wind turbines: Providing power and control wiring for wind turbines in harsh and varying weather conditions.

Data centers

Ensuring the integrity and reliability of uninterrupted power supply to critical data centre infrastructure, minimizing the risk of downtime due to fire or other hazards.

Military and defence

Weapon systems: Used in critical defence systems where high reliability under extreme conditions is required.

Field operations: Providing robust and reliable power in field-deployed equipment and temporary installations.

Key Features of Mineral Insulated (MI) Cables

Built for Safety, Performance, and Longevity. Mineral Insulated (MI) Cables are the benchmark for high-performance wiring in critical and demanding environments. Engineered to deliver unrivaled reliability, MI cables offer a combination of mechanical strength, thermal endurance, and fire resistance that conventional cables cannot match. Here’s what sets them apart:

1. Exceptional Fire Resistance

MI cables are completely fireproof. Thanks to their inorganic construction using metal sheathing and compressed magnesium oxide insulation, they can withstand direct exposure to flame and continue operating during and after a fire event — ensuring life-saving systems like alarms and emergency lighting stay functional when needed most.

2. High Temperature Endurance

Designed for the extremes, MI cables can operate safely in environments with temperatures exceeding 1000°C. Whether it’s in industrial kilns, heat-treating furnaces, or nuclear plants, they maintain stability and insulation integrity without deterioration.

3. Superior Mechanical Strength

With a rugged metal sheath and compact design, MI cables are highly resistant to mechanical damage. They can endure vibration, compression, and crushing — making them perfect for underground, marine, and transportation-related installations.

4. Zero Maintenance, Long Lifespan

Once installed, MI cables require no ongoing maintenance. Their corrosion resistance, thermal stability, and robust insulation ensure decades of dependable performance with minimal risk of failure or degradation.

5. Radiation and Chemical Resistance

MI cables are ideal for harsh environments such as nuclear reactors, petrochemical facilities, and offshore platforms. They resist radiation, oil, acids, and most industrial chemicals — providing safe and stable operation in hazardous conditions.

6. High Insulation Resistance

The use of compressed mineral insulation (magnesium oxide) offers extremely high insulation resistance. This makes the cable immune to moisture, which is a common cause of failure in conventional cables.

7. Low Smoke, Zero Toxicity

In the event of a fire, MI cables do not emit smoke, toxic fumes, or gases. This is especially important for installations in enclosed or populated areas such as tunnels, hospitals, aircraft, and public buildings.

8. Flexible Design and Customization

Available in a variety of configurations — from single-core to multi-core, and in different sheath materials like copper, stainless steel, or Inconel — MI cables can be tailor-made to suit virtually any application or regulatory requirement.

MI cable construction

The construction of Mineral Insulated (MI) cable is unique and consists of the following components (inorganic compounds):

1. Conductor:

Material: Copper (or sometimes other metals like stainless steel for specific applications).

Number of conductors: Typically single or multiple solid conductors.

2. Insulation:

Material: Magnesium Oxide (MgO) powder.

Properties: MgO is an inorganic material that provides excellent electrical insulation and high-temperature resistance.

3. Sheath:

Material: Copper (most common) or sometimes stainless steel for additional corrosion resistance.

Purpose: The sheath provides mechanical protection and acts as an electrical shield. For environments requiring additional protection against corrosion, stainless steel or other materials can be used for the sheath.

Where is MI cable prohibited?

While not directly prohibited, MI cables are not suitable for:

• Flexible, temporary, and moving installations. MI cables are rigid and difficult to install in flexible environments.
• General residential use: While MI cables are excellent for specific critical applications, they are typically not used for general residential wiring due to cost, installation complexity, and other suitable alternatives.

DOMADIA™ MI Enhanced Grade Wiring Cable System

The DOMADIA™  MI Cable range offers an optimal solution for a wide variety of low voltage electrical circuits. Available in two voltage ratings—500 and 750 Volts—this range features conductors ranging from 1.0 sq.mm to 240 sq.mm. Additionally, a comprehensive selection of complementary accessories and tools ensures a complete wiring system, all backed by the assurance of “Genuine DOMADIA™ ” components.