Technical Brief: 3+1 Three-Phase Four-Wire Power CableThe 3+1 three-phase four-wire power cable is a specialized low-voltage power transmission component, configured with 3 equal-gauge phase conductors (L1/L2/L3) and 1 reduced-gauge neutral conductor (N). Engineered for 50/60Hz AC systems, it facilitates balanced three-phase load distribution while providing a return path for unbalanced currents. Typical specifications range from 35 to 185 mm² (conductor cross-section), with XLPE insulation and PVC/PE outer sheathing for electrical insulation and mechanical protection. It is predominantly deployed in industrial power distribution (e.g., motor drives, heavy-duty equipment) due to its optimized current-carrying capacity and simplified wiring topology.