Electrical Wiring Harness Solutions | Custom HV & Medical Grade

Electrical wiring harnesses are the nervous system of modern machinery, transmitting power and signals reliably across various industries. At Dongguan Nangu Di Electronics Co., Ltd., we have honed this craft for nearly two decades, evolving from a domestic manufacturer to a global partner for customized wiring solutions. Our journey began in 2006, and today we stand as a national high-tech enterprise and a “Little Giant” in Guangdong Province, recognized for our specialization, sophistication, and innovation.
Our production facilities in Humen, Dongguan span 12,000 square meters, with an additional 10,000 square meters dedicated to production. This scale allows us to handle diverse projects, from small-batch, high-precision medical devices to large-volume automotive wiring harnesses. Our team of 350+ professionals, including 35 R&D engineers, each with over a decade of experience, ensures that every harness we produce meets international standards. We hold ISO9001, ISO13485, IATF16949, and UL certifications, which are pillars of our quality assurance system.
The manufacturing process at Nangudi is a blend of precision and efficiency. We begin with meticulous design, using advanced CAD and simulation software to optimize routing and connector selection. This step is crucial to minimize signal interference and electromagnetic compatibility issues. For example, in our EV battery harnesses, we employ 1000V-rated cables with 300A current capacity, featuring tin-plated copper conductors to ensure conductivity and corrosion resistance. The insulation, whether PTFE, PVC, or neoprene, is chosen based on the thermal, chemical, and mechanical demands of the application.
Our production lines are equipped with automatic crimping machines, laser marking, and continuous testing systems. Each harness undergoes 100% electrical testing, including continuity, insulation resistance, and high-voltage tests, to guarantee reliability. We maintain a 98% qualified rate across our product lines, a testament to our rigorous quality control. For instance, our medical-grade harnesses, used in smart home healthcare devices, go through additional validation for biocompatibility and sterilization resistance, adhering to ISO13485 standards.
Beyond manufacturing, we excel in customization. Clients bring us their specifications—whether it's a 24P connector assembly for medical equipment or a rugged neoprene cable for industrial power distribution. We respond with rapid prototyping, often within 72 hours, and proceed to mass production with seamless scalability. Our dual production bases in Dongguan allow us to accommodate sudden demand surges without compromising lead times.
Our global reach is supported by our Hong Kong subsidiary, facilitating logistics and customer support for international markets. We export to over 30 countries, serving industries from renewable energy and electric vehicles to medical and automation. For example, a European automotive supplier trusted us to deliver 500,000 wiring harnesses annually, which were integrated into hybrid electric vehicles, achieving a 40% reduction in assembly time compared to their previous supplier.
Sustainability is also a priority. We implement energy-efficient practices and use recyclable materials wherever possible. Our UL-certified solar harnesses, for instance, are designed to withstand harsh UV exposure for over 25 years, reducing replacement frequency and environmental waste.
In summary, Nangudi is not just a manufacturer; we are an engineering partner. Our commitment to innovation is reflected in our 40+ patents, including unique connector designs and cable assembly techniques. Whether you need a simple 2-wire harness or a complex high-voltage network, our electrical wiring harness solutions are built to power your success.