YJV Copper-Conductor XLPE-Insulated PVC-Sheathed Unarmored Power Cable | Cable for fixed installation in indoor conduits and cable trenches

YJV is a widely recognized, unarmored power cable designed for fixed installation in medium- and low-voltage power transmission and distribution systems. Featuring compacted stranded high-purity electrolytic copper conductors, cross-linked polyethylene (XLPE) insulation, and an extruded polyvinyl chloride (PVC) outer sheath, the cable offers excellent electrical conductivity, resistance to thermal aging, and structural stability during long-term continuous operation. Lacking steel-tape armor, YJV cables are more flexible and have a smaller outer diameter than armored counterparts (such as YJV22 or YJLV22), making them ideal for installation in embedded conduits, vertical cable shafts, enclosed cable trenches, and indoor cable racks. Leveraging the inherent creep resistance and low electrical resistance of copper, YJV has become the preferred choice for critical power supply circuits, emergency fire safety lines, and high-reliability distribution backbones. Unlike cost-driven aluminum conductor cables, YJV targets projects that prioritize long service life, energy efficiency, and minimal long-term maintenance; it is widely utilized by design consultants, real estate developers, manufacturers, utility companies, and international EPC contractors in commercial, industrial, and municipal electrical infrastructure projects.

• YJ: Cross-linked polyethylene (XLPE) insulation; features excellent dielectric strength and stable insulation performance under cyclic load variations, as well as superior resistance to thermal degradation and water-tree aging.
• V: PVC outer sheath; provides protection against abrasion, dust, and mild chemical corrosion; suitable for enclosed indoor installation environments.

• GB/T 12706.1–4:2020: National standards for extruded insulation power cables with rated voltages from 0.6/1 kV to 35 kV
• IEC 60502-1 & IEC 60502-2: International standards for extruded insulation power cables
• IEC 60228: Global standard for cable conductor construction
• GB/T 19666: Flame-retardant grade specifications; flame-retardant modified YJV cables (grades ZA, ZB, ZC) available
• Comprehensive Certifications: Includes ISO9001 Quality Management System certification, CCC mandatory certification, CE certification, CB certification, full-item type test reports, raw material inspection reports, and third-party independent test certificates; fully meets requirements for bid documentation, technical reviews, and final acceptance audits for overseas infrastructure tender projects.

Utilizing a Class 2 compacted stranding process, the conductor achieves superior roundness and density, effectively reducing overall DC resistance and power transmission losses. The copper material exhibits negligible creep under the sustained pressure of terminal crimping, ensuring stable contact resistance over decades of continuous operation and eliminating the risk of connection temperature fluctuations common in aluminum conductor cables; the smooth, uniform conductor surface enhances crimping consistency during terminal installation.

The extrusion process incorporates online wall-thickness deviation monitoring to strictly control insulation dimensional tolerances. The cross-linked polyethylene (XLPE) material offers excellent resistance to dielectric breakdown, hydrolysis, and oxidation, effectively inhibiting insulation degradation caused by long-term load fluctuations or trace moisture in enclosed conduits, thereby ensuring consistently reliable insulation performance throughout the designed service life.

Filler strips fill the interstices between multi-core conductors to maintain a uniform, round overall profile, mitigating internal compression and friction during installation (pulling and bending) to prevent insulation surface damage, while also retarding moisture ingress in semi-enclosed, humid installation environments.

This outer sheath effectively withstands surface friction, minor abrasions, dust accumulation, and corrosion from mild acids or alkalis during conduit threading and installation. It meets basic protection requirements for enclosed indoor installations while maintaining excellent flexibility to accommodate complex bends and routing designs within buildings.

• Standard low-voltage specifications: 0.6/1kV (most widely used for indoor power distribution)
• Customizable medium-voltage specifications: 8.7/10kV, 8.7/15kV, and 26/35kV (suitable for indoor substation wiring and conduit-based backbone power transmission)

A complete range of specifications covering 10mm² to 630mm², suitable for small branch circuits, medium-sized distribution feeders, and large-cross-section, heavy-load backbone lines.

3-core, 4-core, 5-core, 3+1, 3+2, and 4+1 configurations; asymmetrical core layouts and special cross-sectional combinations can be customized based on client construction drawings.

• Maximum long-term continuous operating temperature of conductor: 90°C
• Maximum short-circuit withstand temperature (duration ≤ 5 seconds): 250°C
• Minimum ambient temperature for installation: 0°C for standard models; low-temperature custom models support installation in cold environments down to -20°C.
• Design service life under proper installation and normal operating conditions: ≥ 30 years

• Minimum bending radius for multi-core YJV: ≥ 12 times the cable outer diameter
• Minimum bending radius for custom single-core YJV: ≥ 15 times the cable outer diameter
• Structural Limitations: No built-in steel tape armor; not suitable for direct burial in soil or for installation in areas subject to frequent external impact, crushing, or rodent damage.

For long-distance power transmission with identical cross-sectional dimensions, YJV copper-core cables exhibit lower line resistance and power loss compared to YJLV aluminum-core cables. Although they are heavier per unit length, their long-term energy-saving benefits and connection stability give them a distinct overall advantage in high-standard power supply projects.

• Ensuring connection stability for critical power supply circuits: Copper conductors effectively prevent the creep deformation issues common in aluminum-core cables, ensuring stable connection temperatures under conditions of long-term continuous loading and the stress of frequent start-stop cycles. This characteristic makes YJV cables the preferred choice for fire safety circuits, emergency power supplies, dedicated elevator lines, and power distribution systems in high-security data centers.
• Flexible, unarmored design enhances installation efficiency along complex routes: Lacking an armor structure, YJV cables feature a smaller outer diameter and superior flexibility. They can be routed more smoothly through embedded wall conduits, floor sleeves, and narrow vertical cable shafts, thereby reducing installation complexity for intricate internal wiring layouts and significantly cutting down on on-site wiring labor time.
• Low line resistance reduces long-distance power transmission losses: Copper’s high conductivity minimizes voltage drops and active power losses during long-distance transmission and reduces heat generation in the lines; this helps industrial enterprises and property managers control long-term electricity costs and achieve energy-saving operational goals.
• Customizable flame-retardant ratings compliant with building fire safety codes: Flame-retardant properties (ZA, ZB, or ZC grades) can be configured as required to meet fire safety standards for main power supply lines in high-rise basements, underground parking garages, commercial complexes, and large public building electrical systems, ensuring smooth fire safety acceptance and filing processes.
• Unified global standards with exceptional design compatibility: The YJV specification system, current-carrying capacity tables, installation requirements, and matching terminal accessories form a unified industry standard widely recognized by global design institutes, third-party auditing bodies, and power authorities, thereby accelerating drawing reviews, project approvals, and final acceptance inspections.

• Lower long-term O&M costs offset higher upfront procurement costs: Although the initial unit price is higher than that of aluminum-core YJLV cables, the extremely low line failure rate reduces the need for routine inspections, joint maintenance, partial replacements, and losses associated with production downtime during the operational phase. Consequently, for projects planned to operate continuously for over 20 years, these cables offer superior overall economic benefits.
• Superior conduit-pulling performance reduces on-site labor requirements: The small outer diameter and excellent flexibility accelerate the conduit-pulling process and reduce total man-hours for electrical installation subcontracts, helping EPC contractors control indirect construction costs and improve project profit margins.
• Ample ready-stock inventory shortens order delivery lead times: Maintaining a consistent inventory of finished products in common cross-sections and core configurations supports small-batch trial orders, urgent project replenishment, and rapid bulk shipments, thereby preventing construction delays caused by lengthy production cycles.
• Low risk of failure alleviates the burden of post-sales liability: Stable electrical performance reduces complaints regarding circuit failures and maintenance disputes after project completion, helping real estate developers and EPC contractors smoothly fulfill warranty obligations while building a strong reputation for future tenders.
• Clear benchmarks simplify the preparation of technical responses for tenders: In tender documents, YJV often serves as the standard reference model for technical comparisons against YJLV and YJV22; our technical team provides targeted comparative analysis to assist clients in efficiently preparing technical responses and optimizing their proposals.

• Main and branch power distribution lines within high-rise residential buildings, office complexes, shopping malls, hospitals, and comprehensive educational institutions
• Power distribution lines installed via embedded conduits, vertical cable shafts, or enclosed cable trenches
• Critical building safety circuits, including fire protection systems, emergency backup power supplies, dedicated elevator power lines, and other essential electrical circuits
• Power distribution for production workshops, auxiliary equipment, and associated control wiring within industrial parks
• Power distribution lines for data centers, telecommunications equipment rooms, and precision instruments requiring high power quality
• Indoor wiring for power substations, cabinet input/output connections, and indoor medium-voltage busway layouts
• Electrical system retrofitting and safety standardization upgrades in existing buildings

• Project Requirements: Installation of main power distribution and branch floor wiring, covering both fire emergency power supplies and standard distribution circuits; requirements included long-term system stability, ease of cable routing through pre-installed conduits, and compliance with local fire safety acceptance standards.
• Solution Implemented: 0.6/1kV YJV copper-core power cables in various specifications, totaling 112 kilometers in supply length; the configuration included a combination of large-cross-section "4+1" core backbone cables and smaller-cross-section branch cables.
• Project Outcomes: The use of a flexible, unarmored cable design significantly improved installation efficiency (conduit pulling), reducing the overall project schedule by 12% compared to using armored cables; copper conductors ensured the stable operation of fire emergency circuits, facilitating successful electrical completion acceptance and fire safety filing; no abnormal temperature rises or circuit failures occurred within five years of project handover.

• Project Requirements: Replace aging wiring in the production workshop with a system utilizing enclosed cable trenches to power continuous production equipment; ensure low line loss and stable load capacity while facilitating future circuit expansion and modifications.
• Solution Implemented: Selected 0.6/1kV YJV 3×185+1×95mm² trunk cables paired with branch cables of various specifications, with a total supply length of 47 kilometers.
• Project Outcomes: The low-resistance copper conductor structure reduced energy consumption during full-load operation; standardized specifications simplified future circuit expansion and modifications, delivering significant long-term energy savings; the project successfully passed internal safety and production acceptance inspections and has consistently passed annual routine electrical inspections for several consecutive years.

• Project Requirements: Indoor power distribution and wiring for the complex’s equipment rooms, water pump rooms, public lighting systems, and underground garages, requiring installation within pre-laid conduits. The project involved large-scale procurement and necessitated strict technical compliance to meet municipal project completion filing standards.
• Solution Implemented: Bulk supply of standard-specification YJV cables totaling 181 kilometers, with flame-retardant modified versions utilized for garage fire-safety circuits.
• Project Outcome: The products fully met municipal acceptance standards, achieving a 100% pass rate in on-site inspections. The use of standardized specifications streamlined the technical review process during project filing, leading the local construction authority to designate this specific YJV cable as the preferred indoor wiring solution for future residential support projects.

YJV cables lack an armored protective layer; direct burial in soil or installation in areas prone to frequent mechanical impact, crushing, or rodent damage is strictly prohibited. Suitable installation methods include routing through embedded conduits, laying in enclosed cable trenches, mounting on indoor supports, and vertical installation in shafts. If direct underground burial is required, YJV22 armored cable should be selected as the alternative.

Use copper cable lugs matched to the conductor cross-section for crimping; strictly control crimping pressure and compression length to ensure compliance with electrical installation standards, thereby preventing poor contact or joint overheating caused by insufficient crimping depth. Copper-to-copper connections do not require transition fittings, making the installation process simpler than that for aluminum-core cables.

Strictly adhere to minimum bending radius requirements during installation; excessive bending is prohibited to prevent thinning or damage to the internal insulation layer, which could lead to insulation breakdown during long-term operation. Implement protective measures at conduit openings during cable pulling to prevent scratching or damaging the outer sheath.

For fire safety circuits, basement areas, and main power lines in large public buildings, ZA, ZB, or ZC-rated flame-retardant YJV cables are configured in accordance with design requirements; standard non-flame-retardant YJV cables are suitable only for general, non-fire-related power distribution circuits.

Cable drums must be stored in dry, well-ventilated warehouses, avoiding prolonged exposure to rain or direct sunlight outdoors. During handling and transport, precautions must be taken to prevent severe impacts, crushing, or dropping of the drums, which could cause cracking of the outer sheath or damage to the internal insulation layer, thereby compromising electrical safety performance.

• Comprehensive Documentation Package for Tenders: All products are manufactured in strict accordance with GB/T 12706 and relevant IEC international standards. We provide a complete set of factory qualification certificates, comprehensive type test reports, third-party inspection certificates, and editable technical parameter sheets—fully meeting the requirements for document review, submission, and project acceptance in global tendering processes.
• Rigorous Raw Material Selection and End-to-End Quality Control: We utilize electrolytic copper rods with 99.97% purity and high-quality XLPE insulation materials. Core processes—such as stranding, insulation extrusion, and sheathing—feature real-time, in-line dimensional monitoring to ensure stable DC resistance, consistent insulation thickness, and uniform batch performance, thereby minimizing the risk of bulk order rejection due to incoming material non-compliance.
• Customized Manufacturing for Project-Specific Needs: We offer tailored production services, including flame-retardant modifications (ZA/ZB/ZC ratings), custom manufacturing of medium-voltage cables (10kV/15kV/35kV), and fixed-length cutting. Packaging solutions—such as wooden reels, steel reels, or export-specific packaging—can be customized based on technical drawings and specific project requirements.
• Direct Factory Supply, Stable Pricing, and Flexible Order Minimums: Direct supply from our own manufacturing facilities eliminates intermediary markups. We support small-batch sample orders for preliminary project qualification testing and prioritize production scheduling for bulk orders. Ample inventory of standard specifications ensures rapid dispatch to meet urgent project cabling requirements.
• Full-Lifecycle Technical Support from Our Electrical Engineering Team: Our expert cable design engineers provide complimentary services—including cable selection calculations, comparative analyses of copper versus aluminum solutions, recommendations for optimizing installation routes, remote technical guidance for installation, and systematic post-sales quality monitoring. These services are backed by a formal, long-term product warranty, ensuring customers have complete peace of mind regarding technical and quality aspects after delivery.
• Extensive Cross-Border Export Experience for International Infrastructure Projects: We possess mature export packaging solutions, comprehensive capabilities for preparing customs documentation, and efficient global logistics channels. We have a proven track record of supplying power infrastructure projects across Southeast Asia, Central Asia, Africa, the Middle East, and Latin America, and are well-versed in the project inspection, acceptance, and compliance filing requirements of these diverse regional markets.