An Overview of Mineral Insulated Cable

Because it has low flammability even when operating at high temperatures, a mineral insulated cable (MI cable) is a specific type of cable used in high temperatures or adverse environmental conditions. It allows for accurate measuring and can withstand oxidation.

Mineral insulated cables are currently utilised often in high-rise structures, petrochemical plants, airports, tunnels, ships, offshore oil platforms, the aerospace industry, iron and steel metallurgy, shopping malls, parking lots, and other settings.

Mineral insulated cables outlast regular cables in terms of durability, dependability, and fire resistance. They can operate at temperatures as high as 250 °C continuously, can maintain electricity supply at 950 °C to 1000 °C for 100 hours, and can operate at temperatures as low as 1083 °C for brief periods of time while still operating at the rated voltage of 1000 V below the line.

There are numerous well-known mineral insulated cable manufacturers. Mineral insulated cables have a big carrying capacity, are waterproof, explosion-proof, corrosion-resistant, have high operating temperatures, corrosion resistance, overload protection, and have a longer life than standard cables. We have more than ten years of experience producing various sizes of mineral insulated cable. 

An Overview of Mineral Insulated Cable

The Characteristic Features of Mineral Insulated Cables:

  • Zero combustion energy, no combustion, no support for combustion, no hazardous gas emissions.
  • The cable comes with a mineral-insulated cable termination and an intermediate connector, which improves the cable's fire-resistant performance.
  • Extreme temperatures, flying objects, and fire water spray can all be handled by mineral-insulated cable.
  • High temperatures can be used with mineral-insulated cable.
  • If you buy them from reputed mineral insulated cable manufacturers, they are suitable for hot environments.
  • They do not age and are quite stable.
  • The cable's metal covering might serve as a grounding circuit.
  • The cable's metal jacket can serve as an earthing circuit.
  • The cable's unique construction accounts for its high load ability.
  • EMC performance and electromagnetic shielding that is excellent
  • Animal bites can be avoided with this defense.

Advantages of Mineral Insulated Cables:


Long lifespan in terms of use. Mineral insulated cables can be made stable, long-lasting, and fire-resistant by using inorganic materials. A smaller outer diameter means a smaller cable diameter, which is simple to install, less expensive overall, and unprotected by a tube. In comparison to other cables with the same current rating, mineral insulated cables have a lower diameter.

Low Level of Short-Circuit

Mineral insulated cables have a much higher short-circuit fault rating than other types of cables at the same temperature. Mineral insulated cable's highly compacted insulating substance blocks the passage of vapors, gases, and flames between the equipment components attached to the cable.

Large capacity for load. Mineral insulated cables transfer more currents than other types of cables for the same cable cross-section. Mineral insulated wires can also bear a significant overload at the same time.

High Operating Temperatures

Continuous temperatures up to 250 °C and momentary temperatures up to 1083 °C can be sustained continuously by mineral-insulated cables. Yet, in an emergency, the cable can function for a brief amount of time at a temperature near the copper jacket's melting point. Oil-resistant, corrosion-resistant, water-resistant, and moisture-proof. The smooth metal sheath of the mineral insulated cable allows it to continue to function even if it is entirely submerged in water.

Mechanically Strong

High mechanical strength, effective bending properties, and application in complicated constructions are all possible, but installation space is constrained. Strong and resilient, mineral-insulated cables bought from the best mineral insulated cable manufacturers can endure significant mechanical damage without losing their electrical characteristics.

High Resistance to Corrosion

Mineral insulated cables copper sheathing has a high level of corrosion resistance; therefore for the majority of installations, no additional safeguards are necessary. A plastic outer jacket should be used to protect the mineral-insulated cable in situations where the copper jacket of the cable is vulnerable to chemical corrosion or significant industrial pollution.

Excellent Fire Resistance

After a fire, the cable can be used again. Copper and magnesium oxide are two inorganic minerals used in mineral-insulated cables. These cables can function in close proximity to a flame and do not burn or ignite. The insulation material made of magnesium oxide cures at 2800°C while the copper jacket melts at 1083°C.

As the copper jacket on this cable serves as a ground conductor and has exceptionally low ground resistance, mineral insulated cables do not need a separate ground conductor. In numerous ground neutral systems, the outer copper jacket is the ground and neutral conductor for ground-sheath circuit wiring.

Final Words:

Strong and resilient, mineral-insulated cables can endure significant mechanical damage without losing their electrical characteristics. Mineral insulated cables from good mineral insulated cable manufacturers have a high level of corrosion resistance, so for the majority of installations, no extra safeguards are necessary.