1. Product-Specific Information
1.1 Specification Parameters
The 150mm² Class 5 flexible
Copper PVC insulated earth wire (yellow/green, 450/750V) is engineered with precise specifications to ensure optimal performance in critical grounding applications. At the core of its design is a Class 5 flexible
Copper Conductor, defined by IEC 60228 standards as a highly
Stranded Conductor with a minimum of 196 individual
Copper Strands for a 150mm² cross-section. Each strand has a diameter of approximately 0.4mm, and the stranding pattern follows a concentric lay, with layers of strands twisted in alternating directions to enhance
Flexibility and reduce fatigue during bending.
The conductor’s cross-sectional area of 150mm² is a key parameter, enabling it to handle high fault currents—typically up to 10kA for durations of 1 second—without overheating or mechanical failure. This is critical in large electrical systems where fault currents can surge to extreme levels, requiring a robust pathway to dissipate energy into the ground. The conductor’s DC resistance at 20°C is strictly controlled to a maximum of 0.124Ω/km, ensuring efficient current flow and compliance with international grounding resistance standards (usually <4Ω for most applications).
The
PVC Insulation layer has a nominal thickness of 1.4mm, with a minimum thickness of 1.2mm to maintain reliable electrical isolation. This insulation is rated for a maximum continuous operating voltage of 450/750V, where 450V refers to phase-to-earth voltage and 750V to phase-to-phase voltage, making it suitable for low-voltage distribution systems up to 750V. The insulation’s dielectric strength exceeds 15kV/mm, ensuring it can withstand transient voltage spikes without breakdown.
Mechanical specifications include a minimum bending radius of 12 times the outer diameter (OD) for fixed installations and 15 times the OD for dynamic applications (e.g., where the wire may be moved occasionally). The overall OD of the wire, including insulation, is approximately 18-20mm, depending on manufacturing tolerances. Tensile strength of the insulation is at least 12MPa, with an elongation at break of 150%, ensuring it can withstand the stresses of installation and long-term use.
The yellow-green 双色 insulation (often referred to as “green/yellow” in some regions) adheres to international color-coding standards (e.g., IEC 60446), with each color covering 30-70% of the insulation surface in a striped or helical pattern. This strict color ratio ensures universal recognition as an earth wire, preventing misidentification and ensuring compliance with safety regulations.
1.2 Material Composition and Structural Design
The materials used in the 150mm² Class 5 earth wire are selected to balance conductivity, flexibility, insulation, and durability. The conductor is made from high-purity electrolytic copper (99.95% purity), which offers exceptional electrical conductivity (58 MS/m at 20°C) and ductility. The high purity minimizes impurities that could increase resistance or cause localized heating, while the copper’s malleability allows the strands to be drawn to fine diameters and twisted without fracturing.
The PVC insulation compound is a specialized formulation designed for electrical applications, consisting of polyvinyl chloride resin blended with plasticizers, heat stabilizers, flame retardants, and antioxidants. Phthalate-based plasticizers (e.g., diisononyl phthalate) are used to enhance flexibility, ensuring the insulation remains pliable even at low temperatures (-15°C). Calcium-zinc stabilizers replace traditional lead-based stabilizers to meet RoHS compliance, preventing insulation degradation due to heat and UV exposure.
Flame retardants, such as antimony trioxide and aluminum hydroxide, are added to the PVC compound to achieve a V0 flammability rating per UL 94 standards, meaning the insulation self-extinguishes within 10 seconds after removing the ignition source. This reduces the risk of fire propagation in the event of a short circuit or external fire. Antioxidants (e.g., phenols) are included to slow oxidative degradation, extending the insulation’s service life to at least 20 years under normal operating conditions.
Structurally, the wire features a tightly bonded interface between the copper conductor and PVC insulation, achieved through controlled extrusion processes that ensure the insulation adheres firmly to the conductor surface. This bond prevents moisture ingress between the conductor and insulation, which could lead to corrosion or electrical breakdown. The stranded conductor design also creates small air gaps between strands, improving heat dissipation during high-current events and reducing thermal stress on the insulation.
1.3 Unique Features and Target Applications
One of the most distinctive features of this earth wire is its Class 5 flexibility, which sets it apart from stiffer Class 1-
4 Conductors. This flexibility allows it to be routed through tight spaces, around corners, and through conduit with minimal effort, making it ideal for complex installations such as industrial machinery with intricate wiring harnesses or retrofitting in existing buildings where access is limited. Unlike solid or lightly
Stranded Conductors, which can crack or fatigue when bent repeatedly, the 196-strand design ensures the wire retains its integrity even after multiple flexing cycles.
The 150mm² large cross-sectional area is another key advantage, catering to high-power applications where smaller earth wires would be insufficient. For example, in a 10MW industrial plant, fault currents can exceed 8kA, requiring a conductor with sufficient ampacity to handle such loads without melting. This wire’s capacity to carry 10kA for 1 second (as per IEC 60865) ensures it can safely dissipate these currents, protecting equipment and personnel.
The yellow-green 双色 insulation is a critical safety feature, providing immediate visual identification as an earth wire. This universal color code is mandated by standards such as EN 60446 and NEC Article 250, reducing the risk of accidental connection to live conductors and ensuring compliance with electrical codes worldwide. In high-stress environments like construction sites or manufacturing facilities, this clear 标识 minimizes human error during installation and maintenance.
Target applications for this earth wire are diverse and focused on high-current grounding scenarios:
Heavy Industry: Grounding for large motors, transformers, and switchgear in steel mills, chemical plants, and automotive factories, where fault currents are high and equipment downtime is costly.
Power Distribution: Main earth conductors in medium-voltage (MV) to low-voltage (LV) substations, connecting switchboards, transformers, and surge arresters to grounding grids.
Transportation Hubs: Airports, railways, and seaports, where grounding systems must support high-power equipment (e.g., runway lighting, train signaling) and ensure safety for passengers and staff.
Healthcare Facilities: MRI machines, X-ray equipment, and other high-power medical devices, where precise grounding prevents electrical interference that could compromise diagnostic accuracy.
1.4 Manufacturing Process
The production of the 150mm² Class 5 earth wire involves a series of steps, each controlled to meet strict quality standards. The process begins with copper rod preparation: high-purity copper rods (99.95% purity) are heated and drawn through diamond dies to reduce their diameter to 0.4mm, forming individual strands. This drawing process work-hardens the copper, increasing its tensile strength to 300-350 N/mm² while maintaining conductivity.
Next, the strands are stranded into the Class 5 conductor using a multi-cage stranding machine. The machine layers strands in concentric circles, with each layer twisted in the opposite direction to the previous one to balance torsional stress. For a 150mm² conductor, 196 strands are arranged in 7 layers: 1 central strand, surrounded by 6, 12, 18, 24, 30, and 105 strands in successive layers. This configuration ensures uniform flexibility and current distribution across all strands.
After stranding, the conductor undergoes annealing—a heat treatment process at 350-400°C in a controlled atmosphere—to relieve internal stresses from stranding, restoring ductility and reducing resistance. Annealing is critical for maintaining flexibility, as unannealed strands would be brittle and prone to breaking during bending.
The
Insulated Conductor is then produced using a tandem extrusion line. The PVC compound is melted in an extruder barrel (temperature 160-190°C) and forced through a crosshead die that applies a uniform layer of insulation around the stranded conductor. The die is precision-engineered to ensure the 1.4mm thickness and concentricity (insulation eccentricity <10%), preventing thin spots that could lead to breakdown.
During extrusion, the yellow and green colorants are injected into the PVC melt in a controlled ratio (30-70%) to form the 双色标识. This is achieved using a dual-color extrusion head that creates either a striped or helical pattern, with the color boundaries clearly defined to meet standards.
After extrusion, the wire is cooled in a water bath to solidify the insulation, then passed through a laser diameter gauge to verify OD and insulation thickness. It is then spooled onto large reels (typically 50m or 100m) for further testing.
Quality control tests include:
Only wires passing all tests proceed to packaging and distribution.
2. General Product Information
2.1 Packaging
The 150mm² Class 5 earth wire is packaged to ensure protection during storage, transportation, and handling. For standard lengths (50m, 100m), it is wound onto heavy-duty wooden or plastic reels with flanges of 300mm-500mm diameter, depending on the length. The reels are designed with a central steel hub to facilitate easy mounting on unwinding stands during installation.
Each reel is wrapped in a moisture-resistant polyethylene film to protect against dust and humidity, and the flanges are labeled with detailed product information:
For bulk orders (e.g., 500m-1000m), the wire is supplied on steel reels with reinforced flanges, capable of supporting up to 500kg. These reels are palletized using wooden pallets, with steel straps securing the reels to prevent movement. Each pallet is labeled with the total length, number of reels, and handling instructions.
Smaller cut lengths (e.g., 1m-10m) for sample or repair use are packaged in sealed plastic bags with labels matching the reel information, then placed in cardboard boxes with foam padding to prevent damage during transit.
2.2 Transportation and Handling
Transporting the 150mm² earth wire requires careful handling to preserve its flexibility and insulation integrity. The wire is classified as non-hazardous for transportation, but its weight (approximately 1.7kg/m) and bulk require proper lifting equipment.
During loading/unloading, reels must be lifted using forklifts or cranes with slings placed around the central hub—lifting by the flanges is prohibited, as this can cause flange damage and wire tangling. Reels should be transported horizontally (on their flanges) in trucks or containers, with wooden spacers between reels to prevent rolling.
For road transport, trucks should be covered with a tarp to shield the wire from direct sunlight (which can cause PVC degradation) and rain. For sea transport, containers must be ventilated to prevent condensation, which could lead to insulation moisture absorption. The wire should not be exposed to temperatures below -20°C or above 60°C during transport, as extreme cold can make the insulation brittle, and extreme heat can soften it, leading to deformation.
On-site handling involves mounting reels on rotating stands to unwind the wire smoothly, avoiding twisting or kinking. Pulling the wire from a stationary reel can cause excessive tension, stretching the conductor or damaging the insulation. When cutting the wire, sharp, insulated tools (e.g., cable cutters) should be used to ensure clean cuts without fraying strands.
Storage must be in a dry, well-ventilated area with temperatures between 5°C and 30°C and relative humidity <70%. Reels should be stored on racks, not directly on the floor, to prevent moisture contact. The wire should be used within 3 years of production to ensure optimal flexibility and insulation performance.
2.3 Ordering, Delivery, and Sample Policy
Customers can order the 150mm² earth wire through authorized distributors, manufacturer sales teams, or online portals. Orders require specifying length (standard or custom), quantity, and any additional certifications (e.g., UL, CSA for North American markets). Custom lengths (e.g., 250m) are available with a minimum order quantity of 10 reels.
Lead times for standard orders are 3-5 business days if in stock; for out-of-stock or custom lengths, lead times extend to 2-3 weeks to allow for production and testing. Upon order confirmation, customers receive a pro forma invoice with details of specifications, pricing, delivery terms (EXW, FOB, CIF), and payment terms.
Delivery is via reputable logistics providers, with options for express (24-48 hours), standard (3-5 days), or economy (7-10 days) shipping. International shipments include all necessary documentation: commercial invoice, packing list, certificate of conformity (CoC), and material safety data sheet (MSDS) for PVC insulation. Tracking numbers are provided once shipped, enabling real-time delivery monitoring.
Sample requests are encouraged for qualification testing. Samples are available in 1m-5m lengths, free of charge, with customers covering shipping costs. To request a sample, customers provide company details, intended application, and required certifications. Samples are shipped within 2 business days and include a test report with key parameters (conductor resistance, insulation thickness, flame test results).
2.4 After-Sales Service and Warranty
The 150mm² earth wire is backed by a 10-year warranty from the date of purchase, covering defects in materials and workmanship. The warranty excludes damage from improper installation (e.g., over-bending, incorrect termination), misuse (e.g., using as a live conductor), or exposure to chemicals/extreme temperatures beyond specified limits.
To file a warranty claim, customers contact the after-sales team with proof of purchase, photos of the defect, and a description of the issue. The team assesses the claim within 3 business days; valid claims result in replacement or refund within 5-7 days.
Technical support is available for installation guidance, including:
For large projects (e.g., industrial plants, substations), the manufacturer offers on-site technical support to verify installation compliance with standards (e.g., IEC 60364, NEC 250), ensuring the grounding system meets safety requirements.
Maintenance guidelines include:
2.5 Compliance and Certifications
The 150mm² earth wire complies with a range of international and regional standards to ensure safety and performance:
These certifications are validated through annual audits by third-party laboratories (e.g., SGS, Intertek), ensuring ongoing compliance. The wire also meets national standards in key markets, such as GB 50169 (China) for grounding engineering and AS/NZS 3000 (Australia/New Zealand) for electrical installations.
3. Environmental and Sustainability Considerations
Manufacturers of the 150mm² earth wire are increasingly focusing on sustainability throughout the product lifecycle. The copper conductor is 100% recyclable, with up to 70% of the copper used derived from recycled sources (e.g., scrap
Electrical Cables), orming individual strands. These strands are then cleaned to remove oxides and contaminants, ensuring optimal conductivity and bonding with the insulation.
The stranding process follows, where the 196 strands are twisted in concentric layers using high-speed stranding machines. Each layer is twisted in the opposite direction to the previous one (right-hand lay for the first layer, left-hand for the second, etc.), creating a balanced structure that resists kinking and maintains flexibility. The stranding pitch (distance between consecutive twists) is carefully controlled—typically 16-20 times the diameter of the stranded conductor—to ensure uniform distribution of stress during bending.
Next, the stranded conductor undergoes pre-heating to 80-100°C, which removes moisture and prepares the surface for insulation adhesion. The PVC insulation is then extruded over the conductor using a tandem extrusion line, where the molten PVC compound (heated to 160-190°C) is forced through a crosshead die that shapes it into a uniform layer around the conductor. The extrusion speed is synchronized with the conductor feed rate (typically 60-80 meters per minute) to maintain the specified insulation thickness.
During extrusion, the yellow and green colorants are injected into the PVC compound in precise proportions, creating the required striped pattern. This is achieved using dual-color extrusion dies that ensure the color ratio remains within the 30-70% range specified by IEC 60446. After extrusion, the wire is cooled in a water bath to solidify the insulation, followed by a drying process to remove surface moisture.
Quality control checks are integrated throughout the manufacturing process:
Once certified, the wire is spooled onto steel or wooden reels, with lengths ranging from 50m to 500m, depending on customer requirements. Each reel is labeled with the product code, conductor size, class, voltage rating, length, batch number, and compliance marks.
2. General Product Information
2.1 Packaging
The 150mm² Class 5 earth wire is packaged to ensure protection during storage, transportation, and handling. For bulk orders, the wire is wound onto heavy-duty steel reels with flanges made from 5mm thick steel, reinforced with radial ribs to withstand the weight of the wire (a 500m reel typically weighs 250-300kg). The reel core has a diameter of 300mm, with a central steel axle (50mm diameter) to facilitate lifting with forklifts or cranes.
The wire is wrapped in a moisture-resistant polypropylene film before winding, preventing contact with dust and moisture. Between layers, a thin layer of non-abrasive paper is inserted to reduce friction during unwinding, which could damage the insulation. The reel flanges are labeled with durable, weather-resistant stickers containing:
For smaller quantities (50m-100m), the wire is supplied in compact wooden reels or heavy-duty cardboard spools, wrapped in shrink film to maintain cleanliness. These are packed into corrugated cardboard boxes lined with foam inserts to prevent movement during transit.
Palletization is used for multiple reels, with each reel secured to a wooden pallet (1200x800mm) using steel straps (25mm width) with edge protectors to avoid damage to the reel flanges. Pallets are wrapped in stretch film (120μm thickness) to protect against moisture and dust, with a maximum of 4 reels per pallet to ensure safe handling.
2.2 Transportation and Handling
Transporting the 150mm² earth wire requires careful handling due to its weight and the sensitivity of the insulation to mechanical damage. The wire is classified as non-hazardous for transportation (UN number not required), but carriers must follow specific guidelines to prevent damage:
Loading/unloading: Reels must be lifted using forklifts with extended tines (minimum 1.2m length) or cranes with slings placed around the central axle. Lifting by the flanges is prohibited, as this can cause flange deformation and wire loosening. Reels must be transported horizontally (on their flanges) and secured with chains or ratchet straps to prevent rolling.
Environmental protection: During transit, reels must be covered with waterproof tarps to protect against rain, snow, or direct sunlight. Prolonged exposure to sunlight (UV radiation) can cause the PVC insulation to degrade, reducing flexibility and increasing brittleness.
Temperature control: The wire should not be exposed to temperatures below -20°C or above 50°C during transportation, as extreme cold can make the insulation brittle, while high heat can soften it, leading to deformation.
On-site handling guidelines include:
Unwinding: Use a reel stand or rotator to hold the reel, allowing the wire to unwind freely without twisting. Pulling the wire directly from a stationary reel can cause kinks, which damage the insulation and reduce flexibility.
Storage: Store reels in a dry, well-ventilated area with a temperature range of 5°C to 30°C and relative humidity below 70%. Reels should be placed on pallets or racks, not directly on the ground, to prevent moisture absorption.
2.3 Ordering, Delivery, and Sample Policy
Customers can order the 150mm² Class 5 earth wire through authorized distributors, manufacturer sales teams, or online portals. Orders require specifying:
Length per reel (50m, 100m, 250m, 500m, or custom lengths)
Standard lead times are 3-5 business days for in-stock items, or 2-3 weeks for custom lengths. A confirmation document is sent within 24 hours of ordering, including specifications, pricing, delivery terms (EXW, FOB, CIF), and payment details.
Delivery options include:
International shipping: 7-14 days, with all necessary customs documentation (commercial invoice, packing list, certificate of conformity) provided.
Sample requests are available for customers to verify quality before bulk orders. Samples are 1-3m lengths, provided free of charge, with customers covering only shipping costs. Samples include a test report with key parameters (conductor resistance, insulation thickness, flame retardancy results) and are shipped within 48 hours of the request.
2.4 After-Sales Service and Warranty
The 150mm² Class 5 earth wire is backed by a 10-year warranty from the date of purchase, covering defects in materials and workmanship. The warranty excludes damage caused by:
To file a warranty claim, customers must provide:
The manufacturer’s technical team reviews claims within 3 business days, and approved claims result in replacement or refund within 7 days.
Technical support includes:
On-site support: For large projects (e.g., industrial plants, substations), technical engineers can be dispatched to supervise installation at a nominal fee.
2.5 Compliance and Certifications
The earth wire complies with international and regional standards to ensure safety and performance:
These certifications are validated through annual audits by third-party laboratories (e.g., SGS, Intertek), ensuring ongoing compliance with standards.
3. Environmental and Sustainability Considerations
Manufacturers of the 150mm² earth wire are increasingly focusing on sustainability throughout the product lifecycle:
Material recycling: The copper conductor is 100% recyclable, with 70% of the copper used in production derived from recycled sources (e.g., scrap cables, industrial waste). At end-of-life, the wire can be stripped of insulation, and the copper recycled without loss of conductivity.
PVC sustainability: The PVC insulation uses recycled content (15-20% post-industrial recycled PVC) where possible, reducing reliance on virgin materials. Manufacturers are also exploring bio-based plasticizers (e.g., from vegetable oils) to replace phthalates, reducing environmental impact.
Energy efficiency: Production facilities use energy-efficient extrusion machines and renewable energy (solar, wind) to reduce carbon emissions, with some achieving carbon-neutral status for manufacturing.
Conclusion
The 150mm² Class 5 Flexible Copper PVC Insulated Earth Wire (Yellow/Green, 450/750V) combines high conductivity, flexibility, and durability to meet the demands of critical grounding applications. Its large cross-sectional area, Class 5 flexibility, and universal yellow-green 标识 make it indispensable in heavy industry, power distribution, and infrastructure projects where safety and reliability are paramount.
Comprehensive packaging, transportation protocols, and after-sales support ensure the wire reaches customers in optimal condition and performs reliably throughout its service life. Compliance with international standards and a focus on sustainability further enhance its appeal as a responsible choice for modern electrical systems.
Whether in a steel mill, data center, or renewable energy facility, this earth wire plays a vital role in protecting equipment, personnel, and infrastructure from electrical hazards, making it a cornerstone of safe and efficient power systems.
Español
Portugues
Pусский
Français
العربية
ไทย
Türk dili
Indonesia
Tiếng Việt
Phone
E-mail