LV Critical Circuits MI Cable BTTZ 3.6/6kV 6/10kV Mineral Insulated Copper Sheathed Cable

BTTZ is a mineral-insulated, metal-sheathed low-voltage cable commonly used in fire-resistant and high-reliability power circuits. It is ideal for emergency feeders, life safety systems, and critical building equipment where circuit integrity and durability are paramount.

For emergency power lines, reliability is paramount. BTTZ mineral-insulated cables are ideal for critical low-voltage lines that must operate under extreme temperature conditions, ensuring safer building operation and providing a reliable power supply for life safety and critical services.

BTTZ cables are typically supplied as mineral-insulated (MI) power cables, featuring an internal inorganic mineral insulation layer encased in a continuous metal sheath. This construction is widely used in life safety and emergency circuits because the MI design provides fire resistance and maintains stable circuit operation under high-temperature exposure conditions, meeting project acceptance criteria. Depending on the line environment, an additional protective outer layer can be added to improve the cable's handling performance, abrasion resistance, and identifiability.

• Fire pump and sprinkler pump feeders
• Smoke exhaust and booster fan feeders
• Emergency lighting and evacuation route circuits
• Fire control rooms and critical monitoring power supplies
• Elevator emergency power supplies and critical vertical transport circuits
• Hospitals, public buildings, commercial buildings, and high-traffic areas
• Metros, tunnels, airports, and transportation hubs with stringent requirements for fire-resistant cables

• Emergency risers and shafts
• Basements, machine rooms, utility corridors, service tunnels
• Considerations for high-density cable cabling with high fire resistance and reliability requirements

• Fire Resistance of Critical Circuits

  Mineral insulation (MI) should be selected when circuits must operate under the harsh high-temperature conditions specified in the project standards.

• Durable Metal Sheath Protection

  The metal sheath ensures robust fixed installation performance and reduces the risk of damage to critical lines.

• Stability of Critical Power Transmission

  Choosing an inorganic insulation system provides reliable dielectric properties over a long service life.

• Compliance and Acceptance Support

  When consultant requirements and acceptance criteria emphasize the use of mineral insulation (MI) construction for emergency circuits, the BTTZ (British Toll Collection) standard is often specified.

• Life Cycle Value

  Mineral insulation (MI) construction is a viable option when a superior construction is required to reduce maintenance risk and improve system reliability.

1. Conductor Preparation

   The copper conductor is treated to meet resistance targets and dimensional requirements.

2. Mineral Insulation Filling and Compaction

   Inorganic mineral insulating material is filled and compacted around the conductor to form a primary insulation system.

3. Metallic Sheath Formation

   A continuous metallic sheath is formed around the insulated core wires to provide sealing and protection.

4. Stabilization and Dimensional Control

   The cable is stabilized and dimensionally controlled to ensure consistent electrical performance and ease of handling.

5. Optional Outer Sheath

   An outer protective layer can be applied to improve abrasion resistance, facilitate identification, and installation.

6. Routine Inspections

   Typical inspections include conductor resistance, electrical testing according to applicable standards, sheath continuity verification, dimensional inspection, and marking inspection.

• Over Productions Service

  JinHong has a wide range of cable and conductor products for you to choose from. We will provide caring services and professional project solutions for everyone who needs them.

• Quality Certification Services

  JinHong cable products are manufactured according to GB, IEC, BS, NFC, ASTM, DIN, and other international standards. Our technical team can customize cable products that meet your requirements according to your needs.

• Profession Customer Service

  JinHong provides free professional consulting services to provide you with one-stop project solution services and rapid product delivery solutions.

• Delivery And Shipping Services

  While we at JinHong provide high-quality cables, we also provide good delivery solutions. While ensuring the safe delivery of products, we provide the best packaging and transportation solutions, greatly reducing customers’ transportation costs.

JinHong cable packaging is provided in the form of wooden reels, corrugated boxes, and coils. The cable ends are sealed with BOPP self-adhesive tape and a non-hygroscopic sealing cap to protect the cable ends from moisture. We can print the required marks on the outside of the barrel with waterproof material according to customer requirements.