Building Wires UL 83 THHN/THWN-2 Building Wire – 600V Copper Conductor, PVC/Nylon UL 83 THHN/THWN-2 Building Wire – 600V Copper Conductor, PVC/Nylon (NEC 2023 Compliant) (For Commercial/Industrial Branch Circuits & Feeders in Dry/Damp/Wet Locations) Product Overview UL-listed general-purpose building wire with dual-... 01/25219Building Wire THHN THWN THWN-2