Riyadh Cables 10 AWG (5.26 mm²) THHN/THWN single-core building wire, rated 600V, manufactured with a soft annealed stranded copper conductor, PVC insulation and a durable nylon protective jacket. The wire is blue in colour and is suitable for general-purpose electrical wiring in wet or dry locations, including conduit, ducts and recognized raceways. THHN is rated for 90°C dry locations and THWN for wet/dry applications.