Heavy‑Duty Steel Tape Armored Cable for Factory Trench & Tunnel Fixed Installation

ZC-VV22 is a Class C flame-retardant steel-tape armored low-voltage power cable suitable for AC 50Hz, 0.6/1kV three-phase power distribution systems. It is an upgraded version of the VV series, integrating flame retardancy, mechanical armor, and environmental friendliness.

Compared to ordinary VV cables (unarmored) and ZR-VV cables (flame-retardant only), ZC-VV22 features double-layer steel tape armor and upgraded flame-retardant PVC material, resulting in stronger compressive strength, impact resistance, and flame retardant properties. It is widely used in fixed installation scenarios requiring mechanical protection and fire safety, such as building trunk lines, factory trenches, municipal direct burial, and tunnel lighting systems.

Manufactured according to GB/T 12706.1-2020 and GB/T 19666-2005 standards, and referenced to IEC 60502-1 standard. Its stable electrical performance, reliable mechanical protection, and consistent flame retardancy make it the mainstream choice for cost-effective, safe, and durable low-voltage power distribution projects worldwide.

• 3X10+1X6: Residential Building Power Distribution
• 4X16: Factory Workshop Main Line
• 34X95+24X50: Commercial Complex Main Line
• 54X25: Municipal Road Lighting

Utilizes a flame-retardant PVC sheath and filler formula conforming to GB/T 19666 Class C standards. In the event of a fire, the flame spread rate is limited; no dripping, low smoke. Crucial for high-rise buildings, tunnels, subways, and densely populated public facilities, reducing fire damage and improving evacuation safety.

Double-layer galvanized steel tape armor provides excellent compression resistance, impact resistance, and rodent protection. Withstands soil pressure from direct burial, construction impacts, and rodent damage. Superior to unarmored VV/ZR-VV cables in terms of durability and low-maintenance operation.

PVC insulation/sheath + steel tape armor balance performance and cost. While meeting flame retardancy and mechanical protection requirements, the total cost is lower than YJV22. Suitable for large, cost-sensitive projects (residential areas, municipal roads, general factories).

PVC is resistant to weak acids/alkalis, soil electrolytes, and humid environments. It can operate reliably in direct burial, trench, tunnel, and humid industrial environments. It is not suitable for highly corrosive or long-term immersion environments.

High-purity copper ensures low resistance and low line loss. The uniform PVC insulation layer maintains stable dielectric properties in humid environments, reducing leakage current and ensuring safe low-voltage power supply.

Suitable for direct burial, cable trenches, pipes, tunnels, and indoor fixed installation. Bending radius is 12–15 times the outer diameter, facilitating wiring. Compatible with standard low-voltage accessories and terminal kits.

• 6.1 Residential and Commercial Buildings
  • Main power distribution lines in high-rise buildings and communities
  • Power and lighting circuits in shopping malls, hotels, and office buildings
  • Power supply for fire protection equipment (non-fire-resistant materials)
• 6.2 Industrial Plants
  • Workshop power distribution, motor feeders
  • Underground cable trenches, cable wells, inter-plant lines
  • Chemical, food, and textile factories (non-strongly corrosive environments)
• 6.3 Municipal and Transportation Engineering
  • Urban road lighting and green space power supply
  • Bridge and tunnel lighting and auxiliary power supply
  • Community power grid upgrades and old city renovation
• 6.4 Public Facilities and Transportation Hubs
  • Subway station auxiliary power supply and pedestrian lighting
  • Airport and railway station low-voltage power distribution
  • School, hospital, and sports venue power and lighting
• 6.5 Energy and Public Utility Projects
  • Small power plants and substations with low-voltage power distribution
  • Underground pipelines for waterworks and sewage treatment plants
  • Oil and gas field non-explosion-proof areas

• Voltage: Confirm system voltage is 0.6/1kV; do not use higher voltages.
• Flame Retardancy: Select ZC-VV22 type cable in densely populated/public areas; use fire-resistant cables for critical fire-resistant circuits.
• Armoring: ZC-VV22 type is preferred for direct burial/trenching; ZC-VV type is preferred for indoor non-mechanical stress areas.
• Cross-sectional Area: Calculate the load current and allow for a margin of ≥20%; avoid long-term overload.

• Direct Burial: Depth ≥0.7m; lay 10cm of fine sand above/below the cable; install protective bricks/tiles.
• Crossing Roads/Railways: Use steel pipes; avoid heavy pressure.
• Tunnels/Trenches: Use clamps for fixing; avoid sharp edges.
• Bending: Follow the minimum bending radius; avoid sharp bends.

• Temperature: Laying temperature ≥ 0℃; avoid cold bending.
• Humidity: Not suitable for long-term immersion; seal joints in damp areas.
• Corrosion: Avoid strong acids/alkalis; use corrosion-resistant fittings in coastal/saline-alkali areas.

• Before Power On: Insulation resistance (≥ 10 MΩ·km) and continuity testing.
• Regularly: Insulation inspection, sheath integrity inspection, joint sealing inspection.
• Fire Safety: Flame retardant performance needs to be checked regularly in high-risk areas.

• GB/T 12706.1-2020 (equivalent to IEC 60502-1)
• GB/T 19666-2005 (Flame Retardancy)
• Class C Flame Retardant Certification
• ISO 9001, CE (Optional)

• Raw Material Inspection: 99.99% pure copper, qualified PVC, galvanized steel strip.
• Online Monitoring: Insulation layer thickness, armor layer overlap, sheath uniformity.
• Finished Product Testing: 100% electrical testing, flame retardancy testing, mechanical performance testing.

• Factory test reports, certificates of conformity
• Detailed technical data sheets, English installation manual
• Tender/acceptance documents, customs clearance documents

Fixed formulations and processes ensure consistency in electrical, mechanical, and flame-retardant properties across batches—ideal for phased construction and framing procurement.

• Case 1: Urban Community Renovation Project

  A 300,000 square meter residential area used ZC-VV22 4×16mm² cable for direct burial of its main trunk lines. This cable could withstand soil pressure and construction impact. After 8 years, it operated stably without any fire incidents.

• Case 2: Chemical Plant Underground Pipeline Project

  A chemical plant used ZC-VV22 3×95+2×50mm² cable for its underground pipelines. This cable could resist chemical vapors and humid environments. After 5 years, it operated without any problems.

• Case 3: Municipal Tunnel Lighting Project

  A city tunnel used ZC-VV22 5×25mm² cable for lighting. The cable's flame-retardant and armor-like properties ensured safety in confined spaces. The project was successfully accepted without any issues.

• 99.99% oxygen-free copper, low resistance, low loss.
• Specialized low-voltage PVC, stable insulation, aging resistant.
• Standardized galvanized steel strip, stable armor quality.

• Core Wire Configuration: 1-5 cores, 1.5-400mm².
• Sheath Color: Black (standard), Gray, Red.
• Length: Customizable fixed length.
• Special Versions: Termite-proof, Low-smoke (available upon request).

• Free selection, load calculation, and installation plan design.
• Provide technical documents and certification materials required for bidding.
• On-site installation guidance and remote troubleshooting.

• Mainstream specifications (3×10, 4×16, 3×95+2×50) are in stock.
• Mix with other cables to reduce logistics costs.
• Provide framework supply for long-term partners.

• Full set of test reports, certificates, and commercial invoices.
• Multilingual manuals suitable for global projects.
• Smooth customs clearance for international orders.

• Suitable for large-scale projects, offering both performance and price advantages.
• Strict quality control ensures long-term stability.