YTTW 0.6/1kV MI Cable 1000mm2 Conductor Low Voltage Wire 1 To 5 Cores

YTTW is a mineral-insulated, metal-sheathed low-voltage cable commonly used in fire-resistant circuits. It is specifically designed for applications with extremely high compliance and reliability requirements, such as emergency power supplies, fire pumps, smoke extraction systems, and life safety systems, ensuring circuit integrity.

For emergency circuits, downtime is unacceptable. If your project requires fire resistance, stable low-voltage power supply, and long-term reliability in high-rise buildings, transportation facilities, and public buildings, YTTW mineral-insulated cable is the ideal choice.

YTTW is typically supplied as mineral-insulated (MI) cable with a metal sheath. Unlike standard polymer-insulated cables, MI cables use an inorganic mineral insulation layer as the primary medium, protected and isolated by a metal sheath. This structure is widely used in life safety and emergency systems because it maintains circuit integrity under harsh fire conditions and meets relevant acceptance standards. Depending on the route and environment, many projects also specify an outer sheath for identification, abrasion protection, and ease of installation.

• Fire pump power and sprinkler pump feeders
• Smoke exhaust and booster fan feeders
• Emergency lighting and evacuation routes
• Fire control rooms and critical monitoring power
• Elevator emergency power and critical vertical transport circuits
• Hospitals, data centers, control centers, and critical service facilities
• Subways, tunnels, airports, and transportation hubs with stringent fire safety regulations
• Public buildings requiring low smoke and circuit continuity along specific emergency routes

• High-temperature risk paths and fire shafts
• Basements, service tunnels, and utility corridors
• Site conditions requiring enhanced flame retardancy, heat resistance, and harsh environmental performance (depending on the wiring)

• Focus on Fire Integrity of Circuits For projects where specifications require critical circuits to operate continuously in fire environments, metallic insulation (MI) constructions are typically chosen.
• Low Smoke Strategy in Public Areas (Outer Sheath Optional) Many projects opt for outer sheaths to meet low smoke and low toxicity requirements in enclosed spaces and evacuation routes.
• High Mechanical Strength and Long Service Life Metallic sheath designs provide durable circuit protection and robust long-term stability for critical systems.
• Compliance-Driven Procurement YTTW is often used when consultants and inspectors require recognized MI constructions for emergency services and life safety circuits.

• Conductor: Copper
• Insulation: Inorganic mineral insulation
• Sheath: Metallic sheath (depending on construction)
• Outer Sheath: Optional, depending on wiring and handling requirements
• Armoring: Typically not required as the metallic sheath provides protection; external protection may be used depending on the circuit design.
• Cable Type: MI Fire-Resistant Low-Voltage Cable for Fixed Installation

• Conductor Preparation Copper conductors require preparation to meet resistance and dimensional targets.
• Mineral Insulation Filling and Compaction Inorganic mineral insulating material is filled around the conductors and compacted to form the primary insulation system.
• Metal Sheath Forming A metal sheath is formed around the mineral-insulated core wires to provide sealing and protection.
• Dimensional Control and Stabilization The cable's dimensions and stability must meet requirements to maintain consistent electrical performance and operation.
• Outer Sheath (if specified) An outer sheath may be applied to provide abrasion protection, line marking, and ease of installation.
• Routine Validation Typical checks include conductor resistance, insulation integrity testing, standard-compliant electrical testing, sheath continuity testing, dimensional checks, and visual inspection.

1. Confirm the fire-survival requirement in the BOQ (integrity duration/class and test method)
2. Confirm voltage grade and system configuration
3. Choose core count based on circuit design and neutral/PE plan
4. Size cross-section by current, distance, voltage drop, and installation condition
5. Confirm route details (shaft, tunnel, corridor, plant room) and whether oversheath is required
6. Confirm termination kits and accessory system for MI cables
7. Define length planning to reduce joints on critical routes
8. Confirm documentation package for inspection and acceptance

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.