AWG 4/0 Xhhw Wire Aluminum Xhhw-2 Fr Sr Cable Xlp Insulation Building Wire 600V​ The AWG 4/0 XHHW Aluminum Cable—including XHHW-2, FR (Flame Retardant), and SR (Sunlight Resistant) variants—represents a heavy-duty solution for 600V building wiring. Crafted from 1350-H19 aluminum (61% IACS conductivity), its 19-strand (2.1mm diameter) design delivers 230A continuous current at 90°C (XHHW-2) and 195A at 75°C (standard XHHW).​ XLPE insulation ensures exceptional durability: 1.8mm thickness with 22kV/mm dielectric strength, resisting chemicals, moisture, and abrasion. XHHW-2 handles -40°C to 90°C, while FR variants meet UL 94 V-0 flammability, and SR models feature 2.0% carbon black for UV resistance (10,000-hour sunlight endurance).​ Compliant with UL 44 and ASTM B230, this 4/0 AWG cable (3.8kg/m) suits heavy-load applications: main service entrances, large motor feeds, and commercial building distribution. Its flexibility (8× OD bend radius) facilitates conduit/tray installation, offering 40% cost savings over copper, making it ideal for industrial and high-rise construction.