UL 83  Cable Code Designation

Trade Name Thermoset Thermoset Moisture-resistant thermoset Moisture-resistant thermoset Moisture-resistant thermoset Moisture-resistant thermoset Heat-resistant thermoplastic Moisture- and heat-resistant thermoplastic Moisture- and heat-resistant thermoplastic Moisture- and heat-resistant thermoplastic Moisture- and heat-resistant thermoplastic Moisture- and heat-resistant thermoplastic Moisture-resistant thermoplastic

Type Letter XHH XHHN XHHW XHHW-2 XHWN XHWN-2 THHN THHW THW THW-2 THWN THWN-2 TW

Maximum Operating Temperature 90°C 90°C 90°C 90°C 75°C 90°C 90°C 75°C 75°C 90°C 75°C 90°C 60°C

Application Provisions Dry and damp locations Dry and damp locations Dry and damp locations, Wet locations Dry and Wet locations Dry and Wet locations Dry and Wet locations Dry and damp locations Wet location Dry and wet locations Dry and damp locations Dry and damp locations Dry and damp locations Dry and damp locations

Insulation Flame-retardant thermoset Flame-retardant thermoset Flame-retardant, moisture-resistant thermoset Flame-retardant, moisture-resistant thermoset Flame-retardant, moisture-resistant thermoset Flame-retardant, moisture-resistant thermoset Flame-retardant, heat-resistant thermoplastic Flame-retardant, moisture- and heat-resistant thermoplastic Flame-retardant, moisture- and heat-resistant thermoplastic Flame-retardant, moisture- and heat-resistant thermoplastic Flame-retardant, moisture- and heat-resistant thermoplastic Flame-retardant, moisture- and heat-resistant thermoplastic Flame-retardant, moisture- resistant thermoplastic

Outer Covering None Nylon jacket or equivalent None None Nylon jacket or equivalent Nylon jacket or equivalent Nylon jacket or equivalent None None None Nylon jacket or equivalent Nylon jacket or equivalent None

Trade Name Type Letter Maximum Operating Temperature Application Provisions Insulation Outer Covering
Thermoset  XHH 90°C Dry and damp locations Flame-retardant thermoset None
Thermoset  XHHN  90°C Dry and damp locations Flame-retardant thermoset Nylon jacket or equivalent
Moisture-resistant thermoset XHHW 90°C Dry and damp locations, Wet locations Flame-retardant, moisture-resistant thermoset None
Moisture-resistant thermoset XHHW-2 90°C Dry and Wet locations Flame-retardant, moisture-resistant thermoset None
Moisture-resistant thermoset XHWN  75°C Dry and Wet locations Flame-retardant, moisture-resistant thermoset Nylon jacket or equivalent
Moisture-resistant thermoset XHWN-2 90°C Dry and Wet locations Flame-retardant, moisture-resistant thermoset Nylon jacket or equivalent
Heat-resistant thermoplastic THHN 90°C Dry and damp locations Flame-retardant, heat-resistant thermoplastic Nylon jacket or equivalent
Moisture- and heat-resistant thermoplastic THHW 75°C Wet location Flame-retardant, moisture- and heat-resistant thermoplastic None
Moisture- and heat-resistant thermoplastic THW 75°C Dry and wet locations Flame-retardant, moisture- and heat-resistant thermoplastic None
Moisture- and heat-resistant thermoplastic THW-2 90°C Dry and damp locations Flame-retardant, moisture- and heat-resistant thermoplastic None
Moisture- and heat-resistant thermoplastic THWN  75°C Dry and damp locations Flame-retardant, moisture- and heat-resistant thermoplastic Nylon jacket or equivalent
Moisture- and heat-resistant thermoplastic THWN-2 90°C Dry and damp locations Flame-retardant, moisture- and heat-resistant thermoplastic Nylon jacket or equivalent
Moisture-resistant thermoplastic TW  60°C Dry and damp locations Flame-retardant, moisture- resistant thermoplastic None