THW/THW-2-LS/THHW-LS Stranded Copper Electrical Wire 4-14 Gauge PVC Insulation 600V Rated Voltage for Heating Applications​ This versatile range of stranded copper electrical wires, encompassing THW, THW-2-LS, and THHW-LS variants, is engineered to excel in heating applications, blending reliability with safety. Available in 4 to 14 gauge, it caters to diverse power demands, from small residential heaters (14 gauge) to heavy-duty industrial furnaces (4 gauge).​ The THW base variant offers robust PVC insulation, resistant to heat and moisture, ideal for standard heating setups. THW-2-LS enhances safety with low smoke (LS) emission, critical for enclosed spaces, while THHW-LS adds high-heat tolerance, making it suitable for extreme temperature environments. All are rated for 600V, ensuring compatibility with most heating systems.​ Stranded copper construction ensures flexibility, simplifying installation in tight spaces around heating elements. PVC insulation provides durability against abrasion and chemicals, extending lifespan. With 100% copper conductivity, these wires minimize energy loss, boosting heating efficiency. Compliant with industry standards, they balance performance and safety, making them a top choice for contractors and homeowners in heating projects.