Rockwell Automation 1336T Wiring and Grounding Guide, (PWM) AC Drives - Manual (Page 135)

Rockwell Automation Publication DRIVES-IN001M-EN-P - March 2014 135
Glossary
THWN Thermoplastic heat and water-resistant nylon-coated. A U.S. designation for a
specific insulation material, temperature rating, and condition of use (wet
locations) for electrical wire and cable.
Unshielded Cable containing no braided or foil sheath surrounding the conductors. Can be
multi-conductor cable or individual conductors.
UTP Unshielded twisted-pair cable.
Wet Locations with moisture present – see Damp .
XHHW-2 Cross-linked polyethylene high heat-resistant water-resistant. A U.S. designation
for a specific insulation material, temperature rating, and condition of use (wet
locations) for electrical wire and cable.
XLPE Cross-linked polyethylene.
UL Underwriters Laboratories