Overview
Mineral-Insulated (MI) Cables use inorganic mineral materials (typically MgO) as insulation, featuring exceptional fire resistance, high-temperature endurance, and chemical corrosion resistance. They maintain circuit integrity under extreme conditions and are ideal for life-safety systems and critical power. Constructions include copper-sheathed or stainless-steel-sheathed designs, with options for LSZH outer covering, armouring, and multi-core configurations to suit diverse installations.
Typical voltage ratings: 300/500 V, 450/750 V, 0.6/1 kV, up to 3.6/6 kV for special designs
Conductors: Copper (plain/tinned), nickel-plated copper for high-temperature options
Insulation: High-purity magnesium oxide (MgO) mineral insulation
Sheath: Copper tube (common) or stainless steel (SS304/316) for harsh/corrosive environments
Outer covering: LSZH or LSOH extruded jacket (optional) for mechanical protection/marking
Armouring: Optional tape or wire armour for mechanical impact and burial
Fire performance: Fire-resistant (maintains circuit integrity under flame), low-smoke, halogen-free options
Applications: Fire pumps, emergency lighting, smoke extraction, tunnels, metros, petrochemical plants, data centers, hospitals, high-rise buildings
Standards: IEC 60702-1/-2, BS 6387 (CWZ), BS 8491, EN 50200, GB/T 13033, GB/T 34926, UL 2196 (where applicable)
Key Features
Inorganic insulation with outstanding fire survival; circuit integrity under fire, impact, and water spray
High temperature capability: continuous up to 250°C (higher for special types), short-term up to 950–1000°C
Halogen-free, low smoke, non-aging insulation; excellent corrosion and radiation resistance
Very low capacitance and dielectric loss; stable electrical parameters over service life
Durable metallic sheath with excellent EMC shielding and mechanical strength
Layered from inside to outside
Factory photos
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