Details
Winna Yellow-Green Grounding Wire Harness (High Conductivity Safety Ground Wire) is a high-performance grounding connection component designed for industrial electrical systems, power equipment, and new energy devices. It uses high-quality yellow-green dual-color insulation sheath and high-conductivity copper core conductor to ensure low resistance and high reliability grounding path, effectively preventing static accumulation, leakage, and lightning damage. Widely used in distribution cabinets, photovoltaic inverters, electric vehicle charging piles, data center cabinets, and building electrical grounding systems, meeting global safety standards.
Technical Specifications
| Conductor Material | High-purity oxygen-free copper (copper content ≥99.95%) |
| Insulation Sheath | Yellow-green dual-color PVC/TPE (temperature resistance -40°C to +105°C) |
| Cross-sectional Area Range | 1.5mm² – 50mm² (AWG 16 – AWG 1/0) |
| Rated Voltage | 600V / 1000V (depending on wire gauge) |
| Standard Length | 0.3m – 5m (customizable) |
Product Features
- High Conductivity: Multi-strand stranded copper core design with extremely low resistivity ensures stable and reliable grounding loop.
- Dual Safety Identification: International standard yellow-green dual-color sheath clearly distinguishes ground wire, avoiding misconnection risk.
- Weather Resistance and Flame Retardancy: Insulation material passes UL VW-1 flame retardant test, oil-resistant, acid-alkali resistant, UV-resistant.
- Flexible and Easy to Install: Wire harness has high flexibility, suitable for wiring in narrow spaces, supports terminal pre-crimping or custom connectors.
Application Scenarios
Industrial Power Distribution and Control Systems
Used for grounding busbar connection in distribution cabinets, MCC cabinets, PLC control cabinets, ensuring operator and equipment safety, complying with IEC 60364 grounding standards.
New Energy and Electric Vehicle Facilities
Grounding circuit for photovoltaic inverters, energy storage systems, charging piles, effectively discharging lightning-induced current and fault current, improving system EMC performance.
Frequently Asked Questions
What is the difference between yellow-green grounding wire harness and ordinary black wire?
Yellow-green dual color is the internationally recognized ground wire identification (IEC 60446), used to distinguish phase wire (L) and neutral wire (N), avoiding misconnection during maintenance or installation. Winna products use high-conductivity copper core and special sheath, with lower grounding resistance and much higher safety than ordinary wire.
Does Winna grounding wire harness support custom length and terminals?
Yes, we provide OEM/ODM services. Custom wire harness length, stripping length, crimping terminal type (such as O-type, Y-type, fork type), and cable color identification can be customized according to customer drawings, with flexible minimum order quantity.
Does the product have international safety certifications?
Winna yellow-green grounding wire harness has passed CE, FCC, UL, RoHS, and ISO 9001 quality management system certifications, complying with EU Low Voltage Directive (LVD) and North American UL 758 standard, exportable to global markets.
Will wire harnesses age after long-term use? How to extend service life?
Under normal operating conditions, this wire harness has a service life of 10~15 years for silicone rubber material and 5~8 years for PVC material. Factors affecting service life: ① Operating temperature — long-term operation at the upper limit of rated temperature will accelerate aging (service life halved); ② Bending frequency — for frequent bending applications, choose high-flexibility wire harnesses (bending life ≥10 million cycles); ③ Environmental factors — UV, ozone, and chemical solvents will accelerate aging of the silicone rubber outer layer. Recommendations to extend service life: leave a 20% margin in operating temperature, avoid contact with chemical solvents, install protective sleeves during fixed wiring, and regularly check whether the terminal crimp area is heating.
What after-sales services are available after purchasing wire harnesses?
Yingna Technology wire harness products have a standard warranty of 2 years. During the warranty period, free repair or replacement is provided for damage not caused by human factors. Domestic customers receive 48-hour response and repair completion within 7 working days; overseas customers can arrange repair by DHL/FedEx. Products beyond the warranty period are provided paid repair services (cost approximately 30~50% of a new product). Lifetime technical support is provided, including wire harness selection consultation, terminal processing solutions, and quality problem diagnosis. Annual framework agreement customers enjoy value-added services such as priority production scheduling, free samples, and factory inspection support.
Can wire harnesses be processed with terminals? Which terminal types are supported?
Yingna Technology provides wire harness terminal processing services and supports multiple terminal types: pre-insulated terminals (O-type/U-type/tube-type), bare terminals (OT/SC/GT), flag terminals, closed-end terminals, spade terminals, etc. Terminal crimping uses fully automatic crimping machines, and the crimp tensile strength complies with UL 486A. Customer-supplied materials (wire + terminals) processing or designated brand and model terminals are both acceptable. After terminal crimping, adding heat-shrink tubing or insulating sleeves can further improve insulation performance and mechanical strength.
How to judge the quality of wire harnesses?
3 methods to quickly identify wire harness quality: ① Visual inspection — the insulation surface is smooth with no marks, no bubbles, and no color difference or eccentricity; ② Bending test — after repeated bending 100 times, the insulation has no cracks (silicone rubber) and no obvious whitening (PVC); ③ Flame test — for high-quality wire harnesses, self-extinguishing time after removal from flame is ≤30 seconds (UL VW-1/FT2 standard); inferior wire harnesses continue burning with drippings. Also measure insulation thickness (whether it meets UL standard) and conductor resistance (≤ UL specified maximum). Before bulk purchasing, it is recommended to require the supplier to provide samples for comprehensive quality confirmation.
Can the color of the wire harness be customized?
Any color can be customized; usually provide a Pantone color number or color swatch for color matching. Common stock colors: black, white, red, blue, yellow, green (shipped within 24~48 hours). Custom color MOQ depends on specifications (usually from 1000 meters), lead time extended by 3~5 working days. Printing/marking service: model, LOGO, certification mark, etc. can be printed on the wire harness surface as required; both heat transfer printing and inkjet coding processes are supported. Please provide a printing draft before confirming the printing content to avoid errors.
What is the minimum order quantity for custom wire harnesses? How is the sampling fee calculated?
The minimum order quantity (MOQ) for standard wire harness products is 1000 meters/specification; for simple customization (such as color and printing), the MOQ can be as low as 500 meters. For first-time cooperation, sampling can be arranged: sample length 1~5 meters, sampling fee 200~500 yuan (including UL certification label), and the sampling fee will be refunded from the bulk order after the samples are qualified. The lead time for bulk orders is usually 7~15 working days (depending on quantity and complexity). Rush orders can be scheduled for insertion into production (rush fee about 15%), with lead time compressed to 3~5 working days.
What is the temperature resistance range of the wire harness? Can it be used long-term in high-temperature environments?
The temperature resistance range of the wire harnesses in this machine varies by insulation material: silicone rubber insulation -60℃~+200℃ (short-term peak 250℃), PVC insulation -20℃~+105℃. In high-temperature environments (such as automotive engine compartments, around industrial furnaces, and inside new energy vehicle battery packs), silicone rubber wire harnesses must be selected; PVC material will accelerate aging and crack the insulation layer in such scenarios. For low-temperature environments (such as extremely cold outdoor areas) and high-low temperature cycling applications, silicone rubber wire harnesses are also recommended.
What is the minimum bending radius of the wire harness? Can it be used for wiring in confined spaces?
The minimum bending radius of this wire harness is 5 times the wire diameter, far smaller than the 10 times wire diameter requirement for ordinary PVC wire. Due to the stranded structure of multiple extra-fine tinned copper wires, the harness offers excellent flexibility and can be routed flexibly in confined spaces such as mobile phones, sensors, automotive door panels, and LED luminaires, and repeated bending is unlikely to break the core. If a smaller bending radius is required (such as robot drag chains), a high-flexibility drag-chain-specific wire harness can be selected.
What is the flame retardant rating of the wire harness? Does it comply with the UL VW-1 standard?
The flame retardant rating of this wire harness reaches UL VW-1 (vertical burn test), which is the minimum flame retardant requirement of the UL 758 electronic wire standard. Higher flame retardant ratings are optional: UL VW-1 + vertical burn, UL FT2 (horizontal burn), UL VW-1 + FT2 dual certification. Significance of flame retardant standards: For a wire harness that passes VW-1, in the vertical burn test, after 5 times of 15-second burning, the flame self-extinguishes within 60 seconds, does not ignite the cotton cloth below, and has no burning drips. For applications with high fire protection requirements (such as inside new energy vehicle battery packs and medical devices), it is recommended to select a wire harness with a higher flame retardant rating.
About Winna Technology
Winna Technology specializes in power adapters, AC/DC cable harness customization, and ultrasonic metal welding equipment R&D and manufacturing, providing one-stop OEM/ODM services.
Our products are CE/UL/FCC/CCC/RoHS certified, with an annual return rate below 0.02%, serving customers in 50+ countries and regions worldwide.
