Southwire® THHN copper conductors are made with soft drawn copper. Combination-
unilay stranding. The wire is covered with a tough heat and moisture resistant PVC
insulation with an overall nylon jacket. Marked as THWN.
Size (AWG or kcmil) 12 AWG
No. of Conductors 1
No. of Strands 19
Nom. OD (mils) 132 mils
Insulation Thickness (mils) 15 mils
Jacket Thickness (mils) 5 mils
Nominal Total Weight (lbs/1000′) 25 lbs/1000′
Allowable Ampacity at 60C 20
Allowable Ampacity at 75C 20
Allowable Ampacity at 90C 20
UPC # 032886229008
THHN copper conductors are primarily used in conduit and cable trays for services,
feeders and branch circuits in commercial or industrial applications as specified in the
National Electrical Code. Voltage for all applications is 600 volts.
THWN- Wet locations not to exceed 75° C or dry locations not to exceed 90° C or
locations not to exceed 75° C when exposed to oil.
