THW TW THHN THWN Flame and Fire Resistance Electrical Wires 14 12 10 Awg Solid Cable Summary​ THW, TW, THHN, and THWN electrical wires, available in 14, 12, and 10 AWG solid configurations, are engineered with exceptional flame and fire resistance, making them pivotal in safe electrical installations. These wires cater to diverse environments, from residential to industrial settings, ensuring reliable performance under varying conditions.​ The solid construction in 14, 12, and 10 AWG (American Wire Gauge) sizes offers consistent conductivity and structural stability. Smaller 14 AWG is ideal for low-power applications like lighting circuits, while 12 AWG suits medium loads such as household appliances. The robust 10 AWG handles higher currents, perfect for heavy-duty equipment or subpanels.​ THW wires, with PVC insulation, excel in wet/dry locations and resist heat up to 75°C (wet) and 90°C (dry). TW variants, also PVC-insulated, are rated for 60°C in both wet and dry areas, fitting general-purpose indoor use. THHN/THWN wires feature thermoplastic insulation with nylon jackets, boasting 90°C resistance in dry (THHN) and wet (THWN) conditions, ideal for conduit or hazardous zones.​ All variants prioritize fire safety, meeting strict flame-retardant standards to slow fire spread and minimize damage. Their compatibility with standard electrical systems and adherence to industry regulations make them trusted choices for electricians and builders aiming for code-compliant, long-lasting installations.