YTTW Mineral Insulated MI Cable 0.6/1kV To 33kV 5 Core Armoured Cable

YTTW is a mineral-insulated, metal-sheathed low-voltage cable typically used in applications where fire resistance and circuit continuity are critical for life safety and emergency power. It is the preferred choice for critical feeders in public buildings, transportation hubs, tunnels, and high-rise buildings.

If your drawings require a reliable power supply under extreme temperature conditions, specify YTTW. For critical lines relying on reliable low-voltage power for evacuation, fire protection, and essential services, the MI (Mineral Insulation) construction is preferred.

YTTW is typically supplied as a mineral-insulated (MI) metal-sheathed cable. Its primary insulation material is an inorganic mineral material within a metal sheath, rather than relying solely on polymer insulation. This design is widely used in emergency and life-safety circuits because it meets project requirements for circuit integrity and reliability under fire conditions. Depending on the installation environment, an outer protective layer can be specified to improve operability, abrasion resistance, and visibility.

• Power supply for fire pumps and sprinkler pumps
• Smoke exhaust fans and booster systems
• Emergency lighting and evacuation route circuits
• Power supply for fire control rooms and critical monitoring
• Emergency power distribution in high-rise building shafts and risers
• Hospitals, command centers, data and communication rooms
• Metro stations, tunnels, airports, railway hubs, and public places

• Fireproof risers and service shafts
• Basements, computer rooms, utility corridors, tunnels
• Areas where smoke risk reduction and continuous circuit availability are prioritized (sheathing requirements depend on specifications)

• Conductor Preparation
  Copper conductors are prepared to meet dimensional and resistance requirements.
• Mineral Insulation Filling
  Inorganic mineral material is filled around the conductors to form the primary insulation system.
• Sheath Forming and Sealing
  A metallic sheath is formed around the insulated core to provide sealing and protection. Compaction and Stabilization
• Compaction and Stabilization
  The cable is compacted and stabilized to ensure its electrical performance and mechanical integrity.
• Optional Outer Sheath
  A protective outer sheath can be applied to enhance visibility, abrasion resistance, and ease of handling during installation.
• Routine Inspections
  Typical inspections include conductor resistance, electrical testing according to applicable standards, sheath continuity verification, dimensional checks, and visual inspections.

1 core / 2 cores / 3 cores / 4 cores / 5 cores (depending on the project)

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

• 1 core x 6
• 1 core x 10
• 1 core x 16
• 2 cores x 2.5
• 2 cores x 4
• 3 cores x 2.5
• 3 cores x 4
• 3 cores x 6
• 4 cores x 10
• 4 cores x 16
• 4 cores x 25
• 5 cores x 10
• 5 cores x 16
• 5 cores x 25

1. Confirm fire resistance requirements (duration/rating and test methods required in your bill of materials)
2. Confirm voltage rating and system configuration
3. Select core wire quantity based on circuit design and neutral/PE conductor layout
4. Based on current and distance Select cross-sectional area based on permissible voltage drop and wiring conditions
5. Determine if sheathing is required for your environment and identification scheme
6. Confirm MI termination kit and accessory requirements for your project
7. Plan lengths to minimize joints on critical lines
8. Confirm required documentation and inspection requirements for approval and delivery