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Which conductor insulation type is typically used in dry and damp locations but not wet locations?

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  1. THHN
  2. THWN
  3. XHHW

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References

  1. EC&M: Conductors for General Wiring www.ecmweb.com/national-electrical-code/article/20902784/conductors-for-general-wiring Checked 2026-10-10.
  2. EC&M: Conductors for General Wiring www.ecmweb.com/national-electrical-code/article/20902784/conductors-for-general-wiring Checked 2026-10-10.

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