Copper Conductor Wire Flexible Yellow Green 1x10mm2 1x16mm2 1x25mm2 1x35mm2 H05V-K H07V-K NYAF Single Core Earth Cable

Comprehensive Introduction to Flexible Yellow-Green Single-Core Earth Cable with Copper Conductor (1x10mm², 1x16mm², 1x25mm², 1x35mm²; H05V-K, H07V-K; NYAF)

1. Industry Background and Product Positioning

In the global electrical industry, grounding systems are the "safety backbone" of all power-related infrastructure—whether in residential buildings, commercial complexes, industrial factories, or renewable energy projects. A reliable earth cable directly determines the ability to divert fault currents, prevent electric shocks, and protect expensive electrical equipment from damage. With the continuous advancement of electrical safety standards (such as IEC 60364, NEC 250, and GB 50169), the demand for high-performance, standard-compliant earth cables has surged. Against this backdrop, our Flexible Yellow-Green Single-Core Earth Cable with Copper Conductor emerges as a leading solution, designed to meet the strictest safety requirements while adapting to diverse installation environments.

This product is not just a basic electrical component; it is a carefully engineered system that integrates high-purity Copper Conductors, Flame-Retardant Insulation, and NYAF reinforcement—all optimized to deliver consistency, durability, and ease of use. Unlike generic earth cables that may compromise on material quality or Flexibility, our cable is tailored to address the pain points of installers (e.g., difficulty in bending around tight corners) and end-users (e.g., concerns about long-term reliability in harsh conditions). By focusing on core attributes like conductivity, flexibility, and compliance with international standards (H05V-K and H07V-K), it has become a preferred choice for electrical engineers, contractors, and facility managers across industries.

2. Core Material: High-Purity Copper Conductor

The heart of any earth cable is its conductor, and we prioritize uncompromising quality here. Our cable uses 99.95% high-purity electrolytic copper—a material renowned for its exceptional electrical conductivity and mechanical strength. This level of purity is critical because even minor impurities (such as iron, sulfur, or oxygen) can increase electrical resistance, leading to energy loss and overheating during fault current events. In contrast, our copper conductor ensures minimal resistance: for the 1x10mm² 规格，the DC resistance at 20°C is ≤1.83Ω/km; for 1x16mm², it is ≤1.15Ω/km; for 1x25mm², ≤0.743Ω/km; and for 1x35mm², ≤0.529Ω/km. These values not only meet but exceed the requirements of IEC 60228 (the international standard for conductors of Insulated Cables), ensuring efficient current diversion when faults occur.

Beyond conductivity, the copper conductor is engineered for flexibility. It is constructed using stranded Copper Wires (instead of solid copper), with multiple fine strands twisted together in a specific lay pattern. This design allows the cable to bend repeatedly without cracking or breaking— a key advantage in installations where the cable must navigate around equipment, through narrow conduits, or in areas with limited space (e.g., inside power distribution cabinets or under raised floors in data centers). The stranded structure also enhances the conductor’s resistance to mechanical stress: unlike solid conductors, which are prone to snapping under tension, our stranded copper can withstand moderate pulling forces during installation, reducing the risk of damage.

3. Insulation Layer: Yellow-Green Color and Flame-Retardant Performance

The insulation layer of our single-core earth cable serves two critical purposes: protecting the copper conductor from external damage and providing clear visual identification for safety. To fulfill these roles, we use a high-quality polyvinyl chloride (PVC) compound that is formulated for durability, flexibility, and flame resistance.

First, the yellow-green color is not arbitrary—it is a global safety standard (specified in IEC 60446 and GB 7947) for identifying earth cables. This distinct color ensures that electricians and maintenance personnel can quickly locate the grounding system, even in complex electrical enclosures with dozens of cables. The color is integrated into the PVC compound during manufacturing (not just applied as a surface coating), so it will not fade or wear off over time—even after years of exposure to sunlight, moisture, or cleaning agents. This long-term visibility is crucial for compliance with safety inspections: in many regions, non-identified or faded earth cables can result in fines or project shutdowns.

Second, the PVC Insulation is flame-retardant and self-extinguishing. It meets the requirements of IEC 60332-1-2 (a standard for vertical flame propagation of Insulated Wires and cables), meaning that if the cable is exposed to a flame, it will not support combustion for more than 60 seconds after the flame is removed. Additionally, it has a low smoke density and low toxicity: during a fire, it releases minimal smoke (measured by smoke density ≤75% at 4 minutes, per IEC 61034) and no harmful halogen gases (complying with IEC 60754-1). This is especially important in enclosed spaces (e.g., hospitals, high-rise buildings, or underground tunnels) where smoke and toxic fumes can pose a greater risk to human life than the fire itself.

The insulation layer also provides excellent protection against external factors. It has a high resistance to moisture: when submerged in water (at 23°C for 24 hours), the insulation resistance remains ≥100MΩ (measured at 1000V DC), preventing water from seeping into the conductor and causing corrosion or short circuits. It is also resistant to common chemicals found in industrial environments, such as mineral oils, weak acids, and alkalis—though it is not recommended for use in strong chemical baths (we offer specialized versions for such applications upon request). The insulation’s hardness (Shore A 80±5) balances flexibility and protection: it is soft enough to bend easily but rigid enough to resist punctures from sharp objects (e.g., screws, tools) during installation.

4. NYAF Reinforcement: Enhancing Flexibility and Mechanical Strength

To further improve the cable’s performance in demanding installations, we incorporate NYAF (Nickel-Plated Copper Alloy Filaments) as a reinforcement layer between the copper conductor and the PVC insulation. NYAF is a high-strength, corrosion-resistant material that adds structural support without compromising flexibility—addressing a common trade-off in cable design (where increased strength often leads to reduced flexibility).

The NYAF layer is constructed by weaving fine nickel-plated copper alloy filaments around the Stranded Copper Conductor in a spiral pattern. This weaving process creates a "protective sleeve" that:

Enhances flexibility: The spiral design allows the cable to bend in multiple directions without kinking. For example, the cable can be bent to a radius of 5x its outer diameter (OD) for 1x10mm² (OD ≈6.2mm, minimum bend radius ≈31mm) and 6x its OD for 1x35mm² (OD ≈9.5mm, minimum bend radius ≈57mm)—values that are 20-30% smaller than those of non-reinforced earth cables. This makes it ideal for installations where tight bends are unavoidable, such as in modular electrical systems or mobile equipment (e.g., industrial robots).

Improves mechanical strength: The NYAF layer increases the cable’s tensile strength. The 1x10mm² cable can withstand a maximum tensile force of 1.5kN; 1x16mm², 2.2kN; 1x25mm², 3.5kN; and 1x35mm², 4.8kN. This means the cable can be pulled through long conduits (up to 50 meters) without stretching or breaking the conductor— a common issue with non-reinforced cables, which can lead to increased resistance or conductor failure.

Resists corrosion: The nickel plating on the copper alloy filaments provides excellent resistance to oxidation and corrosion. In salt spray tests (per IEC 60068-2-11), the NYAF layer shows no signs of rust or degradation after 48 hours of exposure to 5% sodium chloride solution. This is critical for outdoor installations (e.g., solar farms, outdoor substations) or humid environments (e.g., food processing plants, swimming pool facilities), where corrosion can weaken the cable over time.

5. Compliance with H05V-K and H07V-K Standards

Our flexible yellow-green single-core earth cable is available in two versions, each compliant with a key international standard: H05V-K and H07V-K. These standards (defined by IEC 60245) specify requirements for Flexible Cables with PVC insulation and sheathing, covering parameters like temperature range, voltage rating, and mechanical performance. Understanding the differences between these two versions is essential for choosing the right cable for your application.

5.1 H05V-K Version

The H05V-K version is designed for low-voltage, indoor and protected outdoor applications. Its key specifications include:

Voltage rating: 300/500V (rated voltage for phase-to-phase is 300V, phase-to-earth is 500V), making it suitable for use in low-voltage systems (e.g., 230V/400V residential or commercial power grids).

Temperature range: -25°C to +70°C (continuous operation). This allows the cable to perform reliably in cold environments (e.g., unheated warehouses in winter) and warm environments (e.g., near industrial heaters, though not in direct contact with heat sources exceeding 70°C). For short-term exposure (e.g., during installation), it can withstand temperatures up to +105°C without permanent damage.

Mechanical durability: The H05V-K version passes the "flexing test" (IEC 60245-2) for 10,000 cycles, where the cable is bent back and forth at a specified radius—proving its suitability for applications where the cable may be moved occasionally (e.g., portable electrical equipment or temporary installations).

Common applications for H05V-K include: residential grounding (e.g., connecting electrical panels to earth rods), commercial buildings (e.g., grounding for lighting systems or HVAC equipment), and small-scale industrial setups (e.g., grounding for small motors or control panels).

5.2 H07V-K Version

The H07V-K version is a heavy-duty option for more demanding environments. It builds on the H05V-K’s performance with enhanced voltage and temperature resistance:

Voltage rating: 450/750V, making it suitable for medium-voltage systems (e.g., 400V/690V industrial power grids) or applications where higher voltage tolerance is required (e.g., renewable energy systems like wind turbines or solar inverters).

Temperature range: -40°C to +90°C (continuous operation). This expanded range makes it ideal for extreme environments: it can withstand freezing temperatures in cold climates (e.g., outdoor installations in northern Europe or Canada) and high temperatures in industrial settings (e.g., near furnaces or in tropical regions with year-round heat). Short-term exposure can tolerate up to +120°C.

Mechanical durability: The H07V-K version passes the flexing test for 20,000 cycles—double the H05V-K’s rating. It also has a higher impact resistance: when subjected to a drop test (IEC 60245-2), a 1kg weight dropped from 1m causes no damage to the insulation or conductor.

Common applications for H07V-K include: industrial factories (e.g., grounding for heavy machinery or conveyor systems), renewable energy projects (e.g., grounding for solar arrays or wind farms), outdoor substations, and marine environments (where resistance to extreme temperatures and moisture is critical).

6. Cross-Sectional Sizes and Application Matching

Our cable is available in four cross-sectional sizes—1x10mm², 1x16mm², 1x25mm², and 1x35mm²—each optimized for specific current-carrying capacities and installation scenarios. Choosing the right size is critical: a cable that is too small may overheat during fault currents, while an oversized cable will increase material costs and installation difficulty. Below is a detailed breakdown of each size’s performance and ideal applications.

6.1 1x10mm²

Key Performance: As the smallest size in our range, the 1x10mm² cable has a rated fault current capacity of 8kA for 1 second (at 20°C) and is suitable for low-current grounding systems. Its outer diameter is approximately 6.2mm, making it the most flexible option—ideal for tight spaces.

Ideal Applications:

Residential grounding: Connecting individual electrical outlets, light switches, or small appliances (e.g., refrigerators, washing machines) to the main grounding bus.

Small commercial spaces: Grounding for retail store lighting, POS systems, or small office equipment (e.g., computers, printers).

Low-power industrial equipment: Grounding for small motors (≤10kW), control sensors, or instrumentation panels.

6.2 1x16mm²

Key Performance: The 1x16mm² cable offers a higher fault current capacity of 12kA for 1 second and a DC resistance of ≤1.15Ω/km. Its outer diameter is ~7.5mm, balancing flexibility and current-handling capability.

Ideal Applications:

Commercial buildings: Grounding for HVAC systems (e.g., air conditioners, fans), elevators, or large office equipment (e.g., server racks in small data centers).

Medium-sized industrial setups: Grounding for motors (10-20kW), pumps, or packaging machinery.

Renewable energy: Grounding for small solar inverters (≤50kW) or residential solar panel systems.

6.3 1x25mm²

Key Performance: With a fault current capacity of 18kA for 1 second and a DC resistance of ≤0.743Ω/km, the 1x25mm² cable is designed for medium-to-high current applications. Its outer diameter is ~8.8mm, and it retains good flexibility despite its larger size.

Ideal Applications:

Industrial factories: Grounding for heavy machinery (20-50kW), compressors, or welding equipment.

Commercial complexes: Grounding for large electrical panels, backup generators (≤100kVA), or lighting systems in malls or stadiums.

Renewable energy: Grounding for medium-sized solar arrays (50-100kW) or wind turbines (≤500kW).

6.4 1x35mm²

Key Performance: As the largest size, the 1x35mm² cable has a fault current capacity of 25kA for 1 second and a DC resistance of ≤0.529Ω/km. Its outer diameter is ~9.5mm, and it is reinforced with a thicker NYAF layer to maintain flexibility.

Ideal Applications:

Heavy industry: Grounding for large motors (>50kW), industrial furnaces, or high-voltage equipment (e.g., transformers ≤500kVA).

Utility projects: Grounding for outdoor substations, power distribution lines (low-voltage), or backup generators (>100kVA).

Renewable energy: Grounding for large-scale solar farms (>100kW), wind farms (>500kW), or energy storage systems (ESS).

7. Installation Guidelines and Best Practices

While our flexible yellow-Green Earth Cable is designed for easy installation, following best practices is essential to ensure optimal performance and compliance with safety standards. Below are key guidelines for installation, based on IEC 60364 and local electrical codes.

7.1 Pre-Installation Preparation

Before installing the cable, conduct a visual inspection to check for any damage (e.g., cuts in the insulation, kinks in the conductor) that may have occurred during shipping. Ensure that the cable’s size and standard (H05V-K/H07V-K) match the project’s requirements—using the wrong size or standard can lead to safety hazards. Also, prepare the installation area: clear any debris, ensure that conduits (if used) are clean and free of sharp edges, and verify that the grounding points (e.g., earth rods, grounding buses) are properly installed and meet local resistance requirements (typically ≤4Ω for residential/commercial, ≤1Ω for industrial).

7.2 Installation Techniques

Bending: Avoid bending the cable beyond its minimum bend radius (5x OD for H05V-K, 6x OD for H07V-K). Bending too tightly can damage the conductor or insulation, reducing conductivity and increasing the risk of failure. Use cable organizers (e.g., clips, ties) to secure the cable in place, but do not over-tighten—over-tightening can compress the insulation and damage the NYAF layer.

Termination: Use appropriate cable lugs (copper lugs, sized to match the conductor cross-section) to terminate the cable to grounding points. Clean the conductor and lug with a wire brush before crimping to remove any oxidation, then crimp using a hydraulic crimping tool (not pliers, which can create loose connections). After crimping, insulate the termination with heat-shrink tubing (rated for the cable’s temperature range) to prevent moisture and corrosion.

Outdoor Installation: For outdoor use, ensure that the cable is protected from direct sunlight (use UV-resistant conduit if necessary) and standing water (install the cable above ground or in drained conduits). Avoid installing the cable near heat sources (e.g., chimneys, vents) or areas with high chemical exposure—if such exposure is unavoidable, contact us for a specialized chemical-resistant version.

7.3 Post-Installation Testing

After installation, conduct two key tests to verify performance:

Insulation Resistance Test: Use a megohmmeter (500V or 1000V) to measure the insulation resistance between the conductor and the ground. The resistance should be ≥100MΩ (as specified in IEC 60245-2)—a lower value indicates moisture or damage to the insulation.

Ground Resistance Test: Use a ground resistance tester (e.g., a four-point tester) to measure the resistance of the entire grounding system. Ensure the resistance meets local codes (e.g., ≤4Ω for residential). If the resistance is too high, add additional earth rods or use a ground enhancement compound.

8. Market Advantages and Customer Testimonials

In a crowded market of earth cables, our product stands out for four key advantages:

8.1 Superior Material Quality

Unlike competitors who use recycled copper (which has higher impurities) or low-grade PVC (which fades or burns easily), we use 99.95% high-purity copper and premium flame-retardant PVC. This commitment to quality results in a cable that has a longer lifespan (typically 20-25 years, compared to 10-15 years for generic cables) and requires less maintenance—reducing total cost of ownership for customers.

8.2 Full Compliance with International Standards

Our cable is certified by leading global organizations, including:

IEC (International Electrotechnical Commission): Compliant with IEC 60228, IEC 60245, IEC 60332, and IEC 60364.

CE (Conformité Européenne): Marked with the CE logo, ensuring it can be sold and used in all EU member states.

UL (Underwriters Laboratories): Certified to UL 44 for use in North America (upon request for custom versions).

GB (Guobiao): Compliant with Chinese standards (GB 7947, GB 50169) for use in China and other Asian markets.

This global compliance makes our cable a versatile choice for multinational projects, where consistency across regions is critical.

8.3 Customization Options

While we offer four standard cross-sectional sizes, we also provide customization to meet specific project needs. For example:

Longer lengths: Standard lengths are 100m, 200m, or 500m per reel, but we can produce reels up to 1000m for large-scale projects (e.g., solar farms).

Specialized insulation: For projects in harsh chemical environments (e.g., refineries), we offer insulation made from chlorinated polyethylene (CPE) instead of PVC.

Custom colors: While yellow-green is standard, we can produce cables in other colors (e.g., green or yellow) for customers with unique identification requirements (subject to minimum order quantities).

8.4 Customer Testimonials

Our cable has been trusted by customers across industries. Here are two examples:

A leading European solar installer: "We use the H07V-K 1x35mm² cable for our large-scale solar farms. Its flexibility makes installation fast—we save 20% on labor costs compared to our previous cable. And its resistance to extreme temperatures means we have zero failures, even in winter."

A Chinese industrial machinery manufacturer: "The 1x25mm² cable is perfect for our heavy machinery. It can handle the high fault currents from our motors, and the NYAF reinforcement means it doesn’t break during installation. We’ve been using it for 5 years, and we haven’t had a single grounding-related issue."

9. Quality Control and After-Sales Support

We are committed to delivering consistent quality, which is why we have a strict quality control (QC) process at every stage of manufacturing:

Raw material inspection: All copper and PVC are tested for purity and performance before production.

In-process testing: During manufacturing, samples are taken every 2 hours to check conductor resistance, insulation thickness, and color consistency.

Final testing: Every reel of cable undergoes a series of tests, including insulation resistance, flame retardancy, and mechanical strength, before it is shipped.

In addition to quality control, we offer comprehensive after-sales support:

Warranty: We provide a 10-year warranty on all our cables, covering defects in materials or workmanship. If a cable fails within the warranty period, we will replace it free of charge and send technical support to investigate the cause.

Technical assistance: Our team of electrical engineers is available 24/7 to answer questions about installation, sizing, or compliance. We also offer on-site training for customers who need help with large-scale installations.

Logistics support: We work with global logistics partners (e.g., DHL, Maersk) to ensure fast and reliable delivery. For urgent orders, we can arrange expedited shipping (with delivery times as short as 3-5 days for European and North American customers).

10. Conclusion

In summary, our Flexible Yellow-Green Single-Core Earth Cable with Copper Conductor (1x10mm², 1x16mm², 1x25mm², 1x35mm²; H05V-K, H07V-K; NYAF) is a high-performance, reliable solution for all grounding needs. It combines high-purity copper conductors for efficient current diversion, flame-retardant PVC insulation for safety, and NYAF reinforcement for flexibility—all while complying with the strictest international standards. Whether you are working on a residential project, a commercial building, an industrial factory, or a renewable energy farm, our cable is designed to meet your requirements.

With a focus on quality, customization, and customer support, we aim to be your trusted partner in electrical safety. Contact us today to learn more about our product, request a sample, or discuss your specific project needs—we are here to help you build safer, more efficient electrical systems.