THW vs THWN Wire: The Engineering Difference of a Nylon Jacket
THW and THWN belong to the same UL 83 family of thermoplastic-insulated wires. Both are rated 600V. Both carry a 75°C conductor temperature rating. The only difference in their designation is a single letter—”N” for nylon jackets. That one letter changes three things in real-world engineering: how the wire pulls through conduit, how long it […]