1. Product-Specific Details
1.1 Specifications and Parameters
The yellow-green
Electric Wire set for
House Wiring, featuring flexible
Ground Cables in sizes 6mm² to 25mm², is engineered to meet strict safety and performance standards for residential electrical grounding systems. These cables are designed to provide a reliable path for fault currents, ensuring protection against electric shock and equipment damage in household environments.
Conductor Specifications: The core of each cable is a high-purity
Copper Conductor, with purity exceeding 99.95% to ensure excellent electrical conductivity. The conductor is stranded, consisting of multiple fine
Copper Wires twisted together to enhance
Flexibility. For 6mm² cables, the conductor typically comprises 19 strands of 0.64mm diameter wire; 10mm² cables use 19 strands of 0.82mm wire; 16mm² cables have 37 strands of 0.68mm wire; 25mm² cables feature 37 strands of 0.85mm wire. This stranding design allows the cable to bend easily around corners and through tight spaces in wall cavities or conduit systems, a critical feature for house wiring.
Current-Carrying Capacity: The current-handling capability varies with conductor size, aligning with household fault current requirements. A 6mm² cable can carry up to 40A, suitable for small to medium-sized rooms or appliances. The 10mm² variant handles 57A, ideal for larger rooms or kitchens with multiple devices. The 16mm² cable supports 76A, while the 25mm² cable reaches 101A, making it suitable for main grounding connections in larger homes or for linking to distribution boards. These values are tested under ambient temperatures of 30°C; derating factors apply for higher temperatures (e.g., 80% capacity at 40°C) to prevent overheating.
Insulation Properties: The cables are insulated with polyvinyl chloride (PVC), a material chosen for its durability, flame resistance, and resistance to moisture. The insulation thickness ranges from 0.8mm for 6mm² cables to 1.2mm for 25mm² cables, ensuring effective electrical isolation between the conductor and external surfaces.
PVC Insulation has a dielectric strength of ≥18kV/mm, preventing leakage currents and maintaining insulation integrity even in humid conditions common in bathrooms or basements. It also meets flame-retardant standards (e.g., IEC 60332-1), self-extinguishing within 30 seconds of removing a flame source to minimize fire risks.
Voltage Rating: These ground cables are rated for low-voltage applications, typically 450/750V, which matches the standard voltage of household electrical systems. This rating ensures compatibility with residential wiring, where they connect to grounding terminals in outlets, appliances, and distribution boards.
Physical Dimensions: The overall diameter of the cables increases with size: 6mm² cables have a diameter of ~5.2mm, 10mm² ~6.5mm, 16mm² ~7.8mm, and 25mm² ~9.5mm. The minimum bending radius is 4 times the overall diameter for fixed installations (e.g., 20.8mm for 6mm²) and 8 times for flexible use (e.g., 41.6mm for 6mm²), allowing easy routing during installation without damaging the insulation or conductor.
1.2 Special Purpose
The
Yellow-Green Electric Wire set serves as a critical safety component in house wiring, with specialized roles in protecting occupants and equipment:
Primary Grounding Function: These cables create a low-resistance path for fault currents to flow to the earth, preventing dangerous voltage buildup on appliances, metal fixtures, or exposed conductive surfaces. In the event of a short circuit (e.g., a live wire touching a metal washing machine casing), the ground cable diverts the fault current to the earth, triggering the circuit breaker to trip and 切断 power, reducing the risk of electric shock.
Appliance Safety: They are essential for grounding large household appliances such as refrigerators, ovens, air conditioners, and washing machines. These appliances often have metal casings that could become energized if
Internal Wiring fails; the yellow-green ground cable ensures any fault current is safely discharged.
Distribution Board Connections: In residential electrical panels, the cables link the main grounding busbar to external grounding electrodes (e.g., metal rods driven into the earth). This establishes a system-wide ground, ensuring consistent protection across all circuits in the home. The 25mm² cable is particularly suited for this role, handling high fault currents from the main supply.
Room-Specific Applications:
Bathrooms: Where water increases shock risks, 6mm² or 10mm² ground cables connect to grounded outlets, light fixtures, and heated towel rails.
Kitchens: With multiple high-power appliances, 16mm² cables ground stoves, dishwashers, and microwave ovens, preventing voltage leakage.
Compliance with Safety Standards: The yellow-green color coding is universally recognized (per IEC 60446) as the identifier for
Ground Wires, ensuring electricians can quickly distinguish them from live or neutral wires during installation and maintenance, reducing the risk of misconnection.
1.3 Materials and Styles
Conductor Material: High-purity copper is used for its superior conductivity (≥58 MS/m), ensuring minimal resistance in fault current paths. Copper’s malleability allows the conductor to be stranded, enhancing flexibility without compromising conductivity. Unlike aluminum, copper is resistant to corrosion in moist environments, ensuring long-term performance in hidden wall or floor cavities.
Chemical Resistance: Unaffected by common household cleaners, oils, or detergents, maintaining integrity in kitchens or utility rooms.
Color Coding: The yellow-green striped insulation is not just cosmetic but a safety critical feature. The alternating stripes (typically 15-30mm wide) comply with international standards, making the ground wire instantly identifiable. This prevents accidental connection to live or neutral circuits, a key safety measure during wiring or repairs.
Style Variants: The set includes cables in 6mm² to 25mm² sizes, allowing customization based on specific household needs. All variants are single-core and round, ensuring compatibility with
Standard Cable clips, conduits, and terminal blocks used in house wiring. The flexibility of the
Stranded Conductor makes them suitable for both exposed (e.g., surface-mounted) and concealed (e.g., within walls) installations.
1.4 Production Process
The manufacturing of yellow-green electric wires for house wiring involves precision steps to ensure safety and performance:
Copper Conductor Preparation: High-purity copper rods are drawn through diamond dies to form thin wires (0.64mm to 0.85mm diameter, depending on the final size). These wires are then stranded using a twisting machine, which rotates the wires around a central axis to form a
Flexible Conductor. The stranding process is computer-controlled to ensure uniform tension and lay length (the distance over which a wire completes one full twist), critical for maintaining flexibility and conductivity.
Insulation Extrusion: The stranded conductor is fed into an extrusion line where molten PVC (mixed with flame-retardant additives and yellow-green pigments) is applied. The extrusion die shapes the insulation into a uniform layer around the conductor, with thickness controlled by the line speed and material flow rate. For 6mm² cables, the extrusion speed is ~100m/min; larger sizes run slower (~60m/min for 25mm²) to ensure even insulation coverage.
Cooling and Curing: After extrusion, the cable passes through a water bath to cool and solidify the PVC insulation. This step ensures the insulation adheres tightly to the conductor, preventing delamination. The yellow-green color is verified using optical sensors to ensure stripe width and contrast meet standards.
Quality Testing: Each batch undergoes rigorous testing:
Cutting and Spooling: Passed cables are cut to standard lengths (e.g., 50m, 100m, or 250m) and spooled onto plastic or cardboard reels, ready for packaging.
2. General Product Information
2.1 Packaging
The yellow-green electric wire set is packaged to protect the cables during storage and transportation while ensuring ease of handling for electricians:
Reel Packaging: Cables are spooled onto lightweight, recyclable cardboard reels (for 50m-100m lengths) or sturdy plastic reels (for 250m+ lengths). Reels have flanges to prevent the cable from slipping off and a central core for easy unwinding during installation. Each reel is labeled with:
Protective Wrapping: Reels are wrapped in transparent plastic film to shield the cable from dust, moisture, and UV exposure during storage. For bulk orders, multiple reels are packed into corrugated cardboard boxes with dividers to prevent damage from friction.
Retail Packaging: For smaller quantities (e.g., 5m-10m), cables are sold in sealed plastic bags with printed labels, suitable for DIY projects or small repairs. These bags include installation instructions and safety warnings.
2.2 Transportation
Transportation is designed to prevent physical damage and maintain cable integrity:
Domestic Shipping: For local deliveries, reels are loaded onto palletized trucks. They are secured with shrink wrap and straps to prevent movement during transit. Trucks are covered to protect against rain or snow, which could damage the PVC insulation.
International Shipping: Cables are packed into ISO containers (20ft or 40ft) with wooden pallets. Reels are stacked vertically to maximize space, with dunnage (padding) between layers to absorb shocks. Containers are climate-controlled to avoid extreme temperatures (below -15°C or above 70°C), which could make the PVC brittle or soft.
Handling Guidelines: Shipping documents include instructions to avoid dropping reels, as impact could damage the conductor or insulation. Forklifts or pallet jacks are used for loading/unloading, with lifting points marked on reels to prevent tilting.
2.3 Delivery
The delivery process is streamlined to meet the needs of contractors and homeowners:
Order Processing: Upon receiving an order, the manufacturer verifies stock availability. In-stock items (e.g., 6mm², 10mm²) ship within 24-48 hours; larger sizes (25mm²) may take 3-5 days. Custom lengths are processed within 7-10 days.
Tracking and Notifications: Customers receive a tracking number via email or SMS, allowing them to monitor shipment progress through the carrier’s portal. Delivery updates (e.g., “out for delivery”) are sent to ensure someone is available to receive the order.
Delivery Timescales:
Receipt Inspection: Upon delivery, customers are advised to check reels for damage (e.g., cracked flanges, torn plastic wrap) and verify the cable length and size against the order. Any discrepancies must be reported within 48 hours for resolution.
2.4 Samples
Manufacturers provide samples to enable customers to evaluate quality before bulk purchases:
Sample Availability: Samples are 1m-2m lengths of each size (6mm² to 25mm²), cut from production batches to ensure they represent the final product. They include the yellow-green insulation and
Stranded Copper Conductor.
Request Process: Samples can be requested via the manufacturer’s website, email, or sales team. Customers provide their details (name, company, address) and specify required sizes. Samples are typically free, with customers covering only shipping costs (≈\(5-\)15 for domestic, \(20-\)50 for international).
Shipping: Samples are sent via express couriers (e.g., DHL, FedEx) and arrive within 3-5 days (domestic) or 7-10 days (international). They are packaged in small cardboard tubes to prevent bending or crushing.
Testing Support: Manufacturers include a certificate of compliance with each sample, detailing test results (insulation resistance, flame retardancy) to assist customers in verifying performance.
2.5 After-sales Service
Comprehensive after-sales support ensures customer satisfaction and safety:
Technical Assistance: A dedicated team of engineers provides guidance on installation, including:
Warranty Coverage: The cables come with a 10-year warranty against manufacturing defects (e.g., insulation cracks, conductor breakage due to poor stranding). Warranty claims require proof of purchase and photos of the defect; manufacturers may send replacement cables or arrange refunds.
Field Support: For large projects (e.g., new home developments), manufacturers offer on-site inspections to verify installation quality, ensuring compliance with safety standards. This service is often complimentary for orders over a certain value (e.g., $10,000).
Feedback and Improvement: Customers are encouraged to provide feedback via surveys or direct contact. Common issues (e.g., difficulty stripping insulation) are addressed in product updates, such as adjusting PVC formulation for easier handling.
Training Resources: Online tutorials, videos, and manuals are available to educate electricians on proper installation and maintenance, reducing the risk of improper use that could compromise safety.
In summary, the yellow-green electric wire set for house wiring combines precise engineering, safety-focused design, and robust support to ensure reliable grounding in residential environments. From manufacturing to after-sales, every aspect is tailored to meet the demands of household electrical systems, protecting occupants and equipment for decades.
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