0.6/1kV Multi-Core Flexible Mineral Insulated Fire-Resistant Cable
Core Structure: Solid copper conductors + MgO inorganic mineral insulation + core isolation copper tape + seamless corrugated copper tube 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, integrated 3P+E multi-core layout.
Application Scenarios: Fire emergency power supply for high-rises, subways, hospitals, tunnels and high fire-risk industrial workshops.
Engineering Merit: Single cable replaces four single-core mineral cables to reduce wiring workload, flexible for complex curved pipeline layout, ultra-long fire survival time.
Compliance: Fully complies with GB/T 31247 national standard for mineral insulated cables and GB 50016 national architectural fire protection code.
Product Introduction
BBTRZ is an integrated multi-core flexible inorganic mineral insulated fire-resistant cable rated at 0.6/1kV, adopting a standard 3-phase + protective earth (3×16+1×10) layout. It consists of solid copper conductors, compact magnesium oxide inorganic fireproof insulation, independent core isolation wrapping, seamless corrugated copper tube metal sheath, and orange LSZH low-smoke zero-halogen flame-retardant outer sheath. It achieves Class A fire resistance, sustaining stable power supply for 180 minutes under 950~1000℃ open flame. Compared with single-core BTTZR, its integrated multi-core design eliminates the need to lay multiple single cables separately, greatly simplifying three-phase fire emergency wiring. The corrugated copper tube structure delivers excellent bending flexibility, solving the rigid laying limitation of smooth-tube BTTZ cables. It is the designated dedicated wiring for emergency power circuits in high-rise buildings, hospitals, subways, tunnels and other crowded fire-critical public facilities, for fire pumps, smoke exhaust fans, fire elevators and emergency lighting power supply.
product key technologies
- Solid high-purity oxygen-free copper conductors: 3×16mm² phase cores + 1×10mm² protective earth core
- Compact magnesium oxide (MgO) inorganic mineral fire-resistant insulation for each single core
- Thin copper tape isolation wrapping for each insulated core unit to avoid internal crosstalk
- Integrated seamless corrugated copper tube metal sheath (integrates waterproofing, airtightness, mechanical protection and continuous grounding shielding)
- Orange LSZH low-smoke zero-halogen flame-retardant outer protective sheath
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- Solid Copper Conductors：High-density solid oxygen-free copper provides stable low-resistance large-current transmission for three-phase fire emergency loads. The matched 3×16+1×10 cross-section complies with national three-phase five-wire fire power distribution standards, integrating power transmission and equipment grounding within one cable.
- Magnesium Oxide Mineral Insulation：Inorganic non-combustible insulating material with no smoke or toxic fumes under high temperature. It forms a dense ceramic barrier under open flame to maintain circuit continuity for 180 minutes without breakdown, and never suffers thermal aging with a service life exceeding 100 years.
- Core Isolation Copper Tape：Separates each insulated core inside the copper tube, eliminating mutual electromagnetic coupling interference between phase and earth loops and ensuring stable signal & power transmission.
- Corrugated Seamless Copper Tube Sheath：The core flexible & protective layer: the folded corrugated structure enables sharp bending without tube cracking during cabinet and curved conduit installation; the seamless copper tube fully blocks water, moisture and oil, while acting as a continuous grounding shield to isolate external EMI noise.
- LSZH Flame-Retardant Outer Sheath：Low-smoke zero-halogen composite releases almost no toxic halogen gas during combustion and maintains high visibility for personnel evacuation in fire scenarios; it restricts flame spread and provides abrasion & scratch protection for the inner copper tube.
Key Advantages
- 180-Minute Class A Fire Resistance: Sustains energized operation for 180 minutes under 950℃ flame, fully meeting national mandatory fire safety standards for building emergency power circuits.
- Integrated 3P+E Multi-Core Design: One cable replaces four separate single-core mineral cables, saving conduit space and drastically cutting on-site wiring labor & material costs.
- Superior Flexible Laying Performance: Corrugated copper tube structure supports repeated sharp bending, suitable for complex curved pipelines and narrow electrical cabinet layout unavailable for rigid smooth-tube BTTZ.
- Permanent Non-Aging Inorganic Insulation: Magnesium oxide insulation never degrades from heat, far outperforming organic NH fire-resistant cables with limited service life.
- Low-Smoke Zero-Halogen Fire Safety: Minimal smoke density and zero toxic halogen emission during combustion, the mandatory cable type for densely occupied public buildings.
- All-In-One Copper Tube Barrier: Combines waterproof, moisture-proof, anti-extrusion, anti-rodent, anti-electromagnetic interference and continuous grounding functions in a single seamless metal sheath.
What Are the Product Application Scenarios?
- Main emergency power trunk 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 monitoring and emergency power wiring for subways, highway tunnels and municipal comprehensive pipe corridors
- Evacuation emergency lighting & fire control loops for large stadiums, airports and exhibition centers
- Standby emergency power wiring for chemical plants, power plants and other high fire-risk industrial workshops
Why Choose Shaanxi Jinshenghong Cable
Every batch undergoes full performance testing 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 oxygen-free copper conductors without recycled inferior raw materials.
Rich customizable options: various core combinations & cross-sections, heavy anti-corrosion outer sheath for underground burial, custom outer sheath color schemes.
Sufficient inventory and stable global logistics support fast delivery for fire protection engineering contractors, real estate developers and subway construction enterprises worldwide.
Professional mineral cable technical team provides fire code-compliant wiring layout consultation for public building and industrial fire safety 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 BBTRZ stand for?
A: B = mineral insulated cable; B = multi-core integrated structure; T = copper tube metal sheath; R = corrugated flexible copper tube; Z = LSZH flame-retardant outer sheath.
Q2: What is the core difference between BBTRZ multi-core and BTTZR single-core mineral cables?
A: BBTRZ integrates 3 phase cores + 1 earth core inside one corrugated copper tube, only one cable needs laying for three-phase fire power circuits, saving conduit space and construction time; BTTZR is single-core, requiring separate laying of 4 independent cables for equivalent three-phase five-wire circuits.
Q3: How long can BBTRZ maintain power transmission under fire conditions?
A: Standard Class A fire resistance grade, continuously transmits stable power for 180 minutes under 950℃ open flame, fully satisfying GB 50016 architectural fire code requirements for emergency power supply.
Q4: Can BBTRZ be directly buried in soil without additional conduits?
A: Standard orange LSZH outer sheath is only suitable for indoor cable tray and conduit laying; customized thickened heavy anti-corrosion outer sheath version is required for direct underground burial.
Q5: Is BBTRZ a low-smoke zero-halogen cable?
A: Yes, the outer sheath adopts LSZH low-smoke zero-halogen compound, producing nearly no toxic halogen fumes during combustion, which is a mandatory requirement for crowded public buildings such as hospitals and subways.
Q6: What load scenarios does the 0.6/1kV rated voltage apply to?
A: 0.6/1kV low voltage level, exclusively used for fire emergency power and control circuits below 1kV, not applicable 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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