LSZH Mineral Insulated Power Cable Fire Resistant 5 Core Electrical Cable

YTTW is a low-voltage mineral-insulated, metal-sheathed cable designed for fire resistance and high-reliability power supply. It is suitable for emergency and life-safety circuits in buildings and infrastructure where flame, heat, smoke control, and circuit continuity are critical.

When power supply must be maintained in the event of a fire, conventional cables cannot meet the requirements. YTTW mineral-insulated cables are designed for critical circuits that require fire resistance, low smoke performance (with optional appropriate sheaths), and reliable operation in harsh environments.

YTTW is typically specified as a mineral-insulated, metal-sheathed power cable. Instead of using polymer insulation as the primary insulating medium, it uses inorganic mineral insulation materials within a metal sheath, resulting in strong fire resistance and improved heat resistance, flame retardancy, and tolerance to a variety of harsh environmental factors. YTTW is widely used in emergency power distribution and life-safety circuits where maintaining circuit integrity is a primary design requirement.

Typical Voltage Rating:

0.6/1 kV (depending on the project)

Common Low Voltage Applications:

Emergency feeders, life safety circuits, critical equipment power supplies

Acceptance Criteria:

Please confirm the standards and fire ratings required for your project and jurisdiction.

• Emergency lighting and evacuation systems
• Fire pumps, sprinkler pumps, and fire equipment feeders
• Smoke exhaust fans, booster fans, and smoke extraction systems
• Fire alarm power supplies and critical monitoring circuits
• Elevator emergency power supplies and critical vertical transport circuits
• Hospitals, data centers, control centers, and mission-critical facilities
• Metros, tunnels, airports, and transportation hubs, where cable specifications are fire safety oriented
• Industrial sites, where cable selection depends on high-temperature exposure or fire continuity requirements

• High-rise shafts, emergency risers, and fire-resistant wiring
• Basement service tunnels, utility corridors, and computer rooms
• Areas requiring enhanced heat resistance, flame retardancy, moisture resistance, and shock resistance (depending on cabling path)

Conductor:

Copper (solid or stranded, depending on construction)

Insulation:

Inorganic mineral insulation

Sheath:

Metallic sheath (typically copper or copper-based, depending on construction)

Outer Layer:

Protective outer sheath (typically used for installation, identification, and low-smoke requirements)

Armor:

Usually not required as the metallic sheath provides protection; additional external protection may be required depending on wiring requirements.

Cable Type:

Mineral-insulated fire-resistant low-voltage cable for fixed installations

1. Conductor Preparation

   The copper conductor is treated to meet resistance targets and required flexibility.

2. Mineral Insulation Filling

   An inorganic mineral insulation layer is filled around the conductor to form the primary insulation system.

3. Metallic Sheath Forming

   A metallic sheath is formed around the insulating core structure and sealed according to design requirements.

4. Compaction and Dimension Control

   The cable undergoes compaction and dimensional control to ensure consistent electrical performance and mechanical integrity.

5. Heat Treatment and Straightening

   A heat treatment process is used to stabilize material properties and improve operating characteristics.

6. Outer Sheath (Optional)

   An outer protective layer can be applied to meet requirements for abrasion resistance, identification, and low smoke performance.

7. Routine Inspections

   Typical inspections include conductor resistance, insulation integrity, high-voltage testing according to standards, dimensional checks, sheath continuity checks, and visual inspections.

1C / 2C / 3C / 4C / 5C

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

• 1C x 4
• 1C x 6
• 1C x 10
• 1C x 16
• 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 project fire protection requirements (fire resistance rating, circuit integrity duration, smoke protection requirements, line class)
2. Confirm voltage rating and system Configuration
3. Select the number of cores based on circuit design and neutral/protective electrical wiring diagram.
4. Select the cross-sectional area based on current, distance, allowable voltage drop, and installation conditions.
5. Confirm the required termination and accessory system for mineral-insulated, metal-sheathed cables.
6. Develop a length plan to reduce joints on critical lines.
7. Confirm the documentation package for inspection and acceptance.

Product:

YTTW

Voltage Rating:

__

Required Standards/Requirements:

__

Fire Protection Requirements (Duration/Rating):

__

Number of Cores:

__

Cross-sectional Area and Quantity:

__

Total Length (meters):

__

Installation Route:

Riser/Shaft/Tunnel/Corridor/Equipment Room

Sheath Requirements:

Yes/No, Type: __

Destination:

Country and Port: __

Trade Terms:

__

Packaging:

Reel/Drum

Preferred Length:

__

Required Documents:

__

Question 1: What are YTTW cables primarily used for?

A: YTTW cables are typically used in emergency and life-safety power circuits where fire resistance and circuit continuity are required by project specifications.

Question 2: How do YTTW cables differ from standard XLPE/PVC cables?

A: YTTW cables typically use inorganic mineral insulation and a metallic sheath as their primary safety structure, making them more suitable for fire-critical circuits than general distribution circuits.

Question 3: Are YTTW cables suitable for emergency lighting and fire pump feeders?

A: Yes, YTTW cables are typically used for emergency lighting, fire pumps, smoke exhaust fans, and other critical systems when fire resistance is required.

Q4: Do YTTW cables require an outer sheath?

A: Many projects require an outer sheath to meet requirements for identification, abrasion protection, and low smoke performance. The specific choice depends on the installation environment and standards.

Q5: What should be considered during termination?

A: Mineral-insulated, metallic-sheathed cables typically require compatible termination kits and proper installation methods to maintain performance and sheath integrity. Please confirm the attachment systems required for your project.

Q6 What information is needed for an accurate quote?

A Voltage rating, fire protection requirements, number of cores, cross-sectional area, total length, cabling type, outer sheath requirements, destination, packaging preferences, and required documentation.

• 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.