0.6/1kV Flexible Mineral Insulated Fire-Resistant Cable
Core Structure: Stranded flexible copper conductor + MgO inorganic mineral insulation + corrugated seamless copper sheath + LSZH low-smoke zero-halogen flame-retardant outer sheath.
Core Performance: 180min Class A fire resistance, flexible bending construction, permanent non-aging insulation, low smoke & non-toxic combustion, waterproof & anti-electromagnetic interference copper sheath.
Application Scenarios: Dedicated emergency power supply cable for high-rises, subways, hospitals, tunnels and fire-risk industrial plants.
Engineering Merit: Flexible on-site construction, ultra-long fire survival time, safe smoke-free combustion, century-level service life.
Compliance: Fully complies with GB/T 31247 national standard for mineral insulated cables and GB 31246 building fire protection code.
Product Introduction
BTTZR is a flexible inorganic mineral insulated fire-resistant cable (flexible MI cable) rated at 0.6/1kV. It adopts multi-strand flexible copper conductor, high-temperature magnesium oxide inorganic mineral insulation, seamless corrugated copper tube metal sheath, and low-smoke zero-halogen flame-retardant outer sheath. It can maintain stable power supply for 180 minutes under 950~1000℃ open flame, combining the flexible laying advantage of organic cables and the ultra-high fire safety performance of rigid BTTZ mineral insulated cables. It is the mandatory dedicated wiring for emergency power circuits in high-rise buildings, hospitals, subways, tunnels, shopping malls and other crowded fire-critical public buildings, applied for fire pumps, smoke exhaust fans, fire elevators and emergency lighting power supply.
product key technologies
- Multi-strand flexible oxygen-free copper conductor (1 core × 16mm²)
- Compact magnesium oxide (MgO) inorganic mineral fire-resistant insulation
- Seamless corrugated copper tube metal sheath (waterproof, airtight, mechanical protection & grounding shielding)
- Orange LSZH low-smoke zero-halogen flame-retardant outer protective sheath
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- Flexible Stranded Copper Conductor：Multi-strand soft copper greatly improves bending performance compared with rigid single solid copper core of BTTZ, easy to thread narrow conduits and bend around wall corners. The 16mm² cross-section meets the rated current demand of single-loop fire emergency equipment.
- Magnesium Oxide Mineral Insulation：Inorganic non-combustible insulating material, no smoke or toxic gas under high temperature. It forms a stable ceramic isolation layer under flame to sustain circuit conduction without breakdown for 180 minutes; it never suffers thermal aging, with a service life over 100 years.
- Corrugated Seamless Copper Tube Sheath：Seamless copper tube fully wraps the insulation layer to achieve full waterproof, oil-proof and gas-proof performance. The corrugated fold design enhances bending ductility and avoids cracking during repeated bending; meanwhile, the copper tube serves as continuous grounding shield to isolate electromagnetic interference.
- LSZH Flame-Retardant Outer Sheath：Low-smoke zero-halogen formula releases nearly no toxic halogen fumes during combustion and retains high visibility for personnel evacuation in fire; it restricts flame spread and provides extra abrasion and scratch protection for inner copper tube.
Key Advantages
- 180-Minute Class A Fire Resistance: Sustains stable power transmission for 180min under 950℃ open flame, exceeding national mandatory fire safety standards for emergency circuits.
- Excellent Flexible Laying Performance: Corrugated copper tube + stranded soft copper solves the rigid bending limitation of smooth-tube BTTZ, adaptable to complex cabinets and curved pipeline layout.
- Permanent Non-Aging Insulation: Inorganic magnesium oxide insulation never degrades from heat, far longer service life than organic insulated NH fire-resistant cables.
- Low-Smoke Zero-Halogen Fire Safety: Minimal smoke and zero toxic halogen emission during combustion, the specified cable for densely occupied public buildings.
- Multi-Functional Copper Tube Barrier: Integrated waterproof, moisture-proof, anti-corrosion, anti-extrusion and grounding shielding functions in one seamless copper sheath.
- Ultra-Wide Operating Temperature Range: Stable operation at -40℃ ~ 250℃, instantaneously withstands temperature up to 1083℃ (melting point of copper).
What Are the Product Application Scenarios?
- Emergency main power lines of high-rise residential buildings, commercial plazas, hospitals and schools
- Dedicated power supply circuits for fire pumps, smoke exhaust fans and fire elevators
- Fire emergency control wiring for subways, underground tunnels and municipal comprehensive pipe corridors
- Evacuation emergency lighting circuits for large stadiums, exhibition halls and airports
- Fixed emergency power wiring for nuclear power plants and chemical workshops with high fire risks
Why Choose Shaanxi Jinshenghong Cable
Every batch undergoes complete tests including 180min fire endurance, smoke density, halogen content and bending fatigue before delivery, fully compliant with GB/T 31247 national standard for mineral insulated cables.
Adopts high-purity compact magnesium oxide insulation powder, thick-wall seamless corrugated copper tube and pure flexible copper strands without recycled inferior raw materials.
Customizable options: multi-core BTTZR series, various cross-sections, heavy anti-corrosion outer sheath for chemical plant underground burial, customized outer sheath colors.
Sufficient stock and stable global logistics support fast delivery for fire protection engineering contractors, real estate developers and subway construction enterprises.
Professional mineral cable technical team provides fire code-compliant wiring layout consultation for public building projects.
Thoughtful service - worry free after-sales service
Global logistics
Provide global express and sea freight services, door-to-door, worry free and convenient.
Explanation: Our professional engineering team provides selection and technical support to answer your questions and clarify any doubts.
Provide comprehensive quality assurance and after-sales policies to ensure worry free procurement for you.
FAQ
Q1: What does BTTZR stand for?
A: B = mineral insulated cable; TT = copper tube sheath; Z = flame retardant; R = flexible corrugated copper tube structure.
Q2: What is the core difference between rigid BTTZ and flexible BTTZR?
A: BTTZ adopts smooth rigid seamless copper tube + single solid copper core, unable to bend sharply and only for straight laying; BTTZR uses corrugated fold copper tube + multi-strand soft copper, supports free bending for complex curved pipeline construction.
Q3: How long can BTTZR maintain energized state under fire?
A: Standard BTTZR meets Class A fire resistance standard, continuously transmits power for 180 minutes under 950℃ flame, satisfying national building fire code requirements for emergency power circuits.
Q4: Can BTTZR be directly buried in soil?
A: Standard LSZH outer sheath is suitable for cable trench laying; customized thickened heavy anti-corrosion outer sheath version is required for direct underground burial.
Q5: Is BTTZR low-smoke zero-halogen material?A: Yes, the outer sheath is LSZH low-smoke zero-halogen compound, which will not release toxic halogen gas when burning, a mandatory requirement for densely populated public buildings.
Q6: What load range is 0.6/1kV rated voltage applicable to?
A: 0.6/1kV low voltage level, exclusively for fire emergency power and control circuits below 1kV, cannot be used for medium/high voltage power transmission.
Our address
West of Sanqiao Street Office, Weiyang District, Xi'an City, Shaanxi Province, adjacent to Fortune Building
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