This abstract provides a concise overview of the Low Voltage Power Cable series, featuring conductor cross-sections from 4mm² to 35mm², high-purity copper conductors, ethylene propylene rubber (EPR) insulation, and a flexible rubber sheath—engineered specifically for welding and heavy-duty low-voltage power transmission scenarios. Designed to address the unique demands of welding operations (e.g., frequent movement, exposure to heat, mechanical stress, and harsh environments), this cable series balances electrical performance, durability, and flexibility, making it suitable for both industrial welding workshops and on-site construction welding tasks. At the core of the cable’s performance is its high-purity copper conductor, crafted from 99.95% electrolytic copper that meets 100% of the International Annealed Copper Standard (IACS) for conductivity. This high purity minimizes electrical resistance, reducing I²R energy losses during power transmission—critical for welding equipment, which requires stable current delivery to maintain consistent arc quality. The conductor adopts a stranded construction (Class 5 flexibility per IEC 60228), with the number of copper strands scaling with cross-section (e.g., 4mm² uses 56 strands of 0.3mm diameter, while 35mm² uses 133 strands of 0.58mm diameter). This stranded design enhances the cable’s flexibility, allowing it to bend to a minimum radius of 5–8 times its outer diameter (e.g., 25mm for 4mm² cables, 60mm for 35mm² cables)—essential for navigating around welding machines, workbenches, and on-site obstacles, as well as withstanding repeated coiling and uncoiling. The cable’s EPR insulation is a defining feature tailored to welding’s harsh conditions. Ethylene propylene rubber offers superior heat resistance compared to standard PVC insulation, with a continuous operating temperature range of -40°C to 125°C and short-term resistance to 150°C—critical for withstanding radiant heat from welding arcs and proximity to hot metal workpieces. EPR also exhibits excellent chemical resistance, repelling oils, greases, and mild solvents commonly found in industrial settings, while its inherent flexibility prevents cracking or brittleness even after prolonged exposure to temperature fluctuations. Additionally, EPR insulation provides strong dielectric strength (≥20kV/mm), ensuring reliable insulation performance and preventing electrical leakage—vital for operator safety in high-current welding applications. Complementing the EPR insulation is the flexible rubber outer sheath, typically made of chloroprene rubber (CR) or ethylene propylene diene monomer (EPDM) rubber. This sheath enhances the cable’s mechanical resilience, offering abrasion resistance (surpassing IEC 60811-2-1 standards for wear testing) and impact protection—critical for withstanding rough handling, contact with sharp metal edges, and heavy foot traffic in workshops. The rubber sheath also provides weather resistance, making the cable suitable for outdoor welding tasks (e.g., construction sites, pipeline welding) by repelling water, moisture, and UV radiation without degrading. Current-carrying capacity scales proportionally with conductor cross-section, aligning with the cable’s low-voltage rating (typically 600/1000V, suitable for most industrial welding machines) to meet global standards such as IEC 60245, UL 1581, and GB/T 12706. Specific capacity ranges include: 4mm² (28–35A, ideal for light-duty MIG/MAG welding machines), 6mm² (35–45A, for medium-duty TIG welding), 10mm² (45–60A, for heavy-duty stick welding), 16mm² (60–80A, for industrial-grade MIG welders), 25mm² (80–110A, for large-scale structural welding), and 35mm² (110–140A, for high-amperage submerged arc welding). These capacities ensure the cable can handle the peak currents generated by welding equipment, avoiding overheating and ensuring consistent performance. Practical usability is further enhanced by additional design features: color-coded sheaths (e.g., red for positive polarity, black for negative) for easy circuit identification, tinned copper conductors (optional) to prevent corrosion in humid environments, and flame-retardant properties (meeting IEC 60332-1) to reduce fire risk. The cable’s service life ranges from 8–12 years in heavy industrial use, outperforming PVC-insulated cables by 30–50% due to the durability of EPR and rubber materials. In summary, this Low Voltage Power Cable series (4mm²–35mm²) delivers targeted performance for welding applications, combining high-conductivity copper conductors, heat- and chemical-resistant EPR insulation, and a robust rubber sheath. Its flexibility, durability, and compliance with global standards make it a reliable choice for industrial workshops, construction sites, and any scenario requiring heavy-duty, flexible low-voltage power transmission for welding equipment.