Fire Resistant Mineral Insulated Cable 0.6/1kV BTTRZ Mineral Insulated Wire

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.

• 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 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.

• 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)

• 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

• 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

1. Conductor Preparation
   The copper conductor is treated to meet resistance and dimensional requirements.
2. Mineral Insulation Filling and Compacting
   Inorganic mineral insulation material is filled around the conductor and compacted to form the primary insulation system.
3. Copper Sheath Forming
   A copper sheath is formed around the insulated core wires to provide containment, protection, and stability.
4. Stabilization and Dimension Control
   The cable is stabilized and dimensionally controlled to ensure consistent electrical performance and installation operation.
5. Outer Layer Coating (if specified)
   An outer layer may be applied to improve abrasion resistance, facilitate identification, and improve wiring suitability.
6. Routine Verification
   Common checks include conductor resistance, electrical testing according to required standards, sheath continuity checks, dimensional inspections, and visual marking verification.

• 1C / 2C / 3C / 4C / 5C (Depending on the project)

• 1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240

• 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

1. Confirm required fire resistance requirements and acceptance criteria (fire resistance time/rating and test methods)
2. Confirm voltage rating and system configuration
3. Based on circuit design Select the number of conductors for neutral/protective conductor layout.
4. Select the cross-section based on load, line length, allowable voltage drop, and installation conditions.
5. Confirm the line environment (shaft, tunnel, corridor, equipment room) and whether an outer layer is required.
6. Confirm the termination kit and accessory requirements for MI copper sheathed cables.
7. Plan the length to minimize joints on critical lines and improve commissioning efficiency.
8. Confirm the documents required for approval, inspection, and delivery.