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BTTRZ Fire-Resistant Mineral Insulated Cable 0.6/1kV for Life-Safety LV Power
BTTRZ is a mineral-insulated, copper-sheathed low-voltage power cable typically used in fire-resistant life-safety circuits. It is specifically designed for critical low-voltage feeders in buildings and infrastructure, meeting project requirements for circuit integrity, durability, and enhanced evacuation safety.
Product Highlights
When regulations require circuits to operate under extreme temperature conditions, choose a cable designed for survival, not just operation. BTTRZ mineral-insulated cables are designed for emergency power and life-safety systems, providing reliable low-voltage power to critical lines in high-rise buildings, public buildings, and transportation infrastructure.
BTTRZ Characteristics
BTTRZ is typically supplied as a mineral-insulated (MI) power cable with an inorganic mineral insulation layer within its copper sheath. Depending on applicable standards, many project configurations also include a low-smoke, halogen-free outer layer for easier line identification, handling, and improved performance in enclosed public spaces. Compared to standard polymer-insulated cables, the MI construction is typically used in circuits with higher safety requirements due to its superior fire resistance and line reliability.
Low Voltage Ratings
Typical Voltage Rating: 0.6/1 kV (depending on the project)
Typical Applications: Emergency feeders and critical low-voltage circuits
Selection Rules: Meet the acceptance requirements specified in the Bill of Quantities (BOQ) (fire resistance, smoke protection requirements, line rating, and documentation)
BTTRZ Application Areas
Typical life safety and emergency applications
Fire pump feeders and sprinkler pump power supply
Smoke exhaust fans, stairwell booster fans, and smoke exhaust systems
Emergency lighting, evacuation route power supply, and critical distribution risers
Fire control room power supply and critical monitoring circuits
Hospitals, control centers, and critical facilities requiring reliable emergency wiring
Subways, tunnels, airports, and transportation hubs with stringent fire-resistant cable requirements
Public buildings where cable selection is determined by line density and evacuation safety
Why Project Teams Choose BTTRZ
Excellent fire resistance and circuit integrity
When projects require circuits to remain functional under fire exposure conditions specified in the acceptance plan, mineral insulation and copper sheathing are typically chosen.
Strong Reliability for Critical Paths
The copper sheath and mineral insulation design provides reliable performance in harsh fixed installation environments, reducing the risk to critical services.
Optimal Enclosed Space Strategy (with Optional Outer Layers)
Projects typically select low-smoke halogen-free outer layers or wiring systems to ensure safer evacuation of public areas and reduce secondary hazards.
Long-Term Service Philosophy
This type of cable is often specified when lifecycle reliability, compliance, and reduced maintenance risk outweigh the lowest upfront cost.
High-Value Procurement for Emergency Systems
A single cable type can meet safety-oriented project requirements, streamlining the approval and delivery process for life-safe circuits.
Structural Overview (Typical)
Conductor: Copper
Primary Insulation: Inorganic mineral insulation
Sheath: Copper sheath (depending on specific construction)
Outer Layer: Optional, typically used for low-smoke treatment and identification requirements (depending on project)
Armor: Typically not required due to the protection of the sheath; external protection may be used depending on the line design.
Cable Type: MI type fire-resistant low-voltage power cable for fixed installations
Manufacturing and Process Description
Conductor Preparation
The copper conductor is treated to meet resistance and dimensional requirements.
Mineral Insulation Filling and Compacting
Inorganic mineral insulation material is filled around the conductor and compacted to form the primary insulation system.
Copper Sheath Forming
A copper sheath is formed around the insulated core wires to provide containment, protection, and stability.
Stabilization and Dimension Control
The cable is stabilized and dimensionally controlled to ensure consistent electrical performance and installation operation.
Outer Layer Coating (if specified)
An outer layer may be applied to improve abrasion resistance, facilitate identification, and improve wiring suitability.
Routine Verification
Common checks include conductor resistance, electrical testing according to required standards, sheath continuity checks, dimensional inspections, and visual marking verification.
Common Specifications Overview
Common Core Material Quantities
1C / 2C / 3C / 4C / 5C (Depending on the project)
Common Cross-Section Dimensions (mm²)
1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240
High-Spin Configuration Examples
1C x 6
1C x 10
1C x 16
1C x 25
2C x 2.5
2C x 4
2C x 6
3C x 2.5
3C x 4
3C x 6
4C x 10
4C x 16
4C x 25
5C x 10
5C x 16
5C x 25
Specification Table (Can be copied directly)
Attribute
Detail
Model
BTTRZ
Category
Mineral Insulated (MI) Fire-Resistant Low-Voltage Power Cable
Typical Rated Voltage
0.6/1 kV (depending on project)
Conductor
Copper
Primary Insulation
Inorganic Mineral Insulation
Sheath
Copper Sheath (depending on construction)
Outer Layer
Optional, selected as specified (typically used for low-smoke path strategies and identification)
Core Options
1/2/3/4/5 cores
Typical Size Range
1.5 to 240 mm² (depending on core count and project standards)
Typical Applications
Fire pump power, smoke exhaust fans, emergency lighting, low-voltage life safety circuits
Installation
Fixed installation on designated emergency routes; route protection according to project design
Packaging
Small-size cables are packaged in coils; suitable for large-size cables and reels delivered with the project
A BTTRZ is commonly used for emergency and life-safety low-voltage circuits such as fire pumps, smoke control fans, and emergency lighting where fire-resistant performance and circuit integrity are required by project criteria.
Q2 What makes BTTRZ different from standard XLPE/PVC cables
A BTTRZ is typically a mineral insulated, copper-sheathed construction using inorganic insulation, selected for critical circuits rather than general-purpose distribution.
Q3 Is BTTRZ suitable for high-rise emergency risers and public buildings
A Yes, it is frequently specified for emergency risers, service shafts, and public-building critical routes when fire-resistance requirements apply.
Q4 Do I need an outer layer
A Many projects specify an outer layer for identification, abrasion protection, and route suitability. The decision depends on the installation environment and the acceptance requirement.
Q5 What should I consider for termination
A MI copper-sheathed cables typically require compatible termination kits and correct workmanship to maintain insulation integrity and sheath continuity. Confirm the accessory system and installation method required by the project.
Q6 What details are needed for accurate quotation
A Voltage grade, fire-resistance requirement, core count, size list, total meters, route type, outer layer requirement, destination, packing preference, and documentation needs.
