Flame Retardant PVC Insulated Steel Tape Armoured Power Cable For Civil Construction, Municipal Underground & Indoor Fire-Protected Distribution

• ZC: Class C vertical flame retardant performance, inhibiting the continuous spread of flames under specific combustion conditions.
• V: PVC polyvinyl chloride insulation core (distinguished from YJV series cables with XLPE insulation).
• V: PVC extruded inner sheath.
• 22: Double-layer overlapping galvanized steel tape armor + black weather-resistant PVC outer sheath.
• Rated voltage level: U0/U = 0.6/1kV low-voltage three-phase AC power distribution system.
• Conductor configuration can be customized: single core/double core/three core/four core/five core, Class 2 T2 oxygen-free copper core, cross-sectional area range 1.5mm²～400mm², suitable for small lighting circuits to large main building incoming lines.

• ZB-VV22 / ZA-VV22: Advanced flame-retardant alternatives suitable for large shopping malls, underground parking lots, hospital auxiliary power circuits, etc.
• Low-Temperature Modified ZC-VV22: Suitable for outdoor pipeline laying in high-altitude areas of northern China.
• Reinforced Moisture-Proof Sheath: Customized for underground garages, river embankments, and other water-bearing soil burial environments.

• Rated AC Working Voltage: 0.6/1kV low-voltage civil power distribution system
• Power Frequency Withstand Voltage Test: 3.5kV, 5 minutes without breakdown or abnormal discharge
• Insulation Resistance: PVC insulation maintains stable high insulation resistance under long-term damp basement laying conditions.
• Reference Continuous Current Carrying Capacity: Compliant with various cross-sectional specifications, fully meeting the load design standards for civil building lighting, elevators, HVAC, and water pumps.

• Vertical Flame Spread Test Compliance: Meets GB/T 19666 Class C flame retardant standard; a single cable self-extinguishes within a specified time, and the flame does not continue to spread along the cable length.
• Low Flame Spread Risk: When multiple cables are bundled together, the flame-retardant PVC material can slow the lateral spread of flames within the cable tray, thereby reducing the fire spread range in enclosed basements and pipe corridors.
• Thermal Aging Stability: After long-term continuous thermal cycling testing at 70℃, the insulation layer shows no cracking, powdering, or insulation resistance attenuation.

• Minimum Allowable Bending Radius: 12 times the cable outer diameter (bending radius smaller than XLPE medium/high voltage armored cables, more suitable for indoor bending cabling)
• Static Compression Resistance: Passes the national standard low-voltage cable compression test; PVC insulation layer shows no cracking or permanent deformation.
• Ambient Temperature Requirements: Standard installation environment ≥0℃; Low-temperature customized version supports -15℃ installation without preheating.
• Design Service Life under Standard Indoor/Underground Installation Conditions: Over 30 years
• Damp Heat Resistance: Passes continuous damp heat aging test; suitable for long-term damp underground garages and basements.
• Chemical Corrosion Resistance: Resistant to weakly alkaline soil, alkaline concrete precipitation, and slight indoor corrosive gas erosion.

Ordinary non-flame-retardant VV22 cables cannot pass fire safety inspections in commercial buildings, underground parking lots, and densely populated residential basements. ZC-VV22 cables use flame-retardant PVC insulation and outer sheaths, achieving the national Class C flame-retardant rating, which is the minimum mandatory fire safety requirement for low-voltage main lines in most civil buildings. Electrical design engineers specify ZC-VV22 cables for general commercial and residential basement power distribution lines to ensure one-time fire safety acceptance without the need for secondary cable replacement.

Compared to XLPE-insulated YJV22 series armored cables, ZC-VV22 uses a mature PVC raw material formula, resulting in lower overall production costs and a more stable raw material supply system. For projects that do not require ultra-long-distance transmission, such as mid-to-high-rise residential buildings, small supermarkets, factory auxiliary lighting circuits, and municipal community renovations, the ZC-VV22 effectively reduces the total cost of cable procurement while ensuring qualified electrical performance. This is precisely the core requirement of cost-controlling project procurement managers.

The ZC-VV22 uses flexible PVC insulation and a multi-core circular integrated structure, requiring only a bending radius of 12 times the cable's outer diameter during installation, less than the standard 15 times bending radius for XLPE insulated armored cables. In complex and narrow basement cable trenches, corner conduits, and densely wired electrical shafts, installers can achieve smoother cable bends and pulling, reducing rework caused by insufficient bending space and shortening the overall electrical construction cycle for general contractors.

The ZC-VV22 specification library covers single-core to five-core cables with cross-sectional areas ranging from 1.5mm² to 400mm², simultaneously meeting various cabling needs for lighting branch circuits, dedicated elevator trunk lines, centralized air conditioning power supply, and main building incoming lines throughout a residential or commercial complex. The procurement team only needs one supplier to complete the procurement of all underground armored low-voltage cables, simplifying incoming inspection, classification, and on-site material warehouse management.

The dedicated PVC cable automated production line employs real-time online monitoring to track insulation thickness, flame retardant mixing uniformity, and steel tape armor winding tightness. The flame retardant addition ratio and insulation thickness for each production batch are strictly controlled within standard tolerances, eliminating the risk of substandard flame retardant performance or unstable current carrying capacity between different cable reels, and preventing delays in project fire safety acceptance due to substandard cable batches.

• Residential Construction: Main incoming lines in basements of mid-to-high-rise residential buildings, power distribution trunk lines in building power shafts, lighting and water pump power supply circuits in underground parking lots
• Small and Medium-Sized Commercial Projects: Concealed armored power cables in community supermarkets, restaurants, and neighborhood retail stores; power distribution lines in commercial basements
• Auxiliary Power Supply for Light Industrial Plants: Lighting, ventilation fans, and water pump trunk lines in small machinery workshops; power circuits buried in underground cable trenches in factories
• Municipal Community Renovation: Upgrading and renovating power grids in old residential areas by burying armored cables; underground power distribution lines for urban community public facilities (elevators, streetlights)

• Load and Transmission Distance Matching Rules: ZC-VV22 PVC insulated cable has a long-term allowable temperature of 70℃ and is suitable for short-to-medium distance power transmission in civil buildings within 300 meters. For transmission distances exceeding 300 meters or 24-hour continuous heavy-load industrial trunk lines, voltage drop calculations should be performed, and the use of XLPE insulated YJV22 cable as an alternative should be evaluated to avoid line overheating.
• Fire Resistance Rating Environmental Matching Standards: Standard ZC-VV22 cable should be used in ordinary residential basements and small commercial buildings; large enclosed shopping malls, hospitals, and underground integrated pipe corridors should be upgraded to cables with higher flame retardant ratings such as ZB/ZA according to local fire protection regulations.
• Laying Environment Classification Matching: Standard ZC-VV22 cable is suitable for neutral soil in ordinary dry basements; reinforced moisture-proof modified type is suitable for river embankments with high water content and underground garages with long-term condensation environments; low-temperature resistant type is suitable for outdoor pipeline laying in northern regions.

• Ambient Temperature Control Requirements: The ambient temperature for standard cable laying should not be lower than 0°C; in winter, low-temperature modified sheath models must be selected to prevent brittle cracking of the PVC outer sheath during bending and pulling.
• Bending Radius Limit Standards: The bending radius for all turns, conduit installations, and junction box terminal connections must be at least 12 times the cable's outer diameter; forced sharp-angle bends are prohibited to avoid PVC insulation cracking and concealed circuit leakage risks.
• Heat Dissipation Requirements for Parallel Cable Laying: Sufficient heat dissipation gaps should be maintained between parallel ZC-VV22 cables in cable trenches; PVC insulation has lower heat resistance than XLPE, and excessive cable stacking can lead to a decrease in actual current carrying capacity and overheating risks. Use insulating barriers to separate high-power cables from low-current cables.
• Underground road crossing protection measures: When cables pass under the community's motor vehicle access road, a thin concrete protective layer is laid on top of the cable layer to withstand the rolling pressure of vehicles; extra cable length is reserved at both ends of the distribution box and building distribution room for future circuit maintenance and terminal replacement.

• Before the acceptance process begins, verify the batch factory inspection certificate, third-party Class C flame retardant full-type test report, and copper raw material certificate of origin.
• After cable laying and terminal production are completed, complete the insulation resistance test and power frequency withstand voltage test.
• Check the cable batch flame retardant test records to ensure compliance with fire safety regulatory filing requirements.
• Complete the reliable grounding connection of the double-layer steel tape armor layer, test the grounding resistance, and ensure compliance with the safety operation specifications for low-voltage power grids in civil buildings.

Each delivery includes a complete set of officially certified materials stamped by the factory, at no additional cost: National Power Industry Full-Type Test Report, GB/T 19666 Class C Flame Retardant Inspection Certificate, IEC Certificate of Conformity, CE Certification Documents, Copper Raw Material Certificate of Origin, Batch Production Inspection Records, and Dedicated ZC-VV22 Indoor Buried Laying Instruction Manual. The documents fully comply with the requirements for construction supervision review, fire protection acceptance, municipal project filing, and customs clearance for small-scale overseas civil engineering projects, eliminating project construction delays caused by incomplete flame retardant certification materials.

Our professional PVC flame-retardant cable technical team provides free consultation services throughout the entire process: calculation of civil engineering load capacity, simulation of voltage drop at mid-distance distances, suggestions on cable core count and cross-section matching, selection of flame retardant rating, and optimization design of overall cable trench laying schemes in basements. For large orders in large residential communities and commercial plazas, professional engineers provide remote video on-site construction guidance, promptly solving technical problems for construction teams suchs as narrow shaft wiring, buried cable protection, and fire protection acceptance.

We have established long-term exclusive supply partnerships with top-tier T2 oxygen-free copper smelters and certified flame-retardant PVC raw material manufacturers, completely eliminating the use of recycled copper and inferior non-flame-retardant PVC materials. Each batch of products undergoes comprehensive flame retardant and electrical laboratory testing before delivery; during production, the insulation layer thickness, uniformity of flame retardant additive mixing, and tightness of steel tape armor winding are monitored online in real time to ensure consistent flame retardancy and conductivity of all cable reels.

Our automated production workshop for custom-made ZC-VV22 PVC cables maintains ample inventory of mainstream multi-core universal specifications, allowing for immediate shipment. For key residential renovation and commercial plaza EPC projects, we prioritize the production of customized low-temperature, enhanced moisture-resistant modified ZC-VV22 cables to fully align with the general contractor's construction schedule.

Each reel of cable is printed with a unique production batch number, production date, voltage rating, number of cores, and cross-sectional specifications, ensuring full traceability from raw material supply to finished product delivery. Large-scale civil engineering bulk orders enjoy extended factory quality assurance periods. If, during the warranty period, defects caused by non-human-caused damage such as flame retardant failure, insulation aging due to moisture, or armor damage occur due to factory manufacturing processes, we will provide free replacement shipments and product replacement services to minimize fire safety and power supply risks for both the buyer and long-term partners.