THHN 12 Sol Cu We1BkS 2500Sp

SKU: 56528405
600 Volts. Copper Conductor. Thermoplastic Insulation/Nylon Sheath, Heat, Moisture, Gasoline and Oil Resistant II. Rated THHN and THWN. Also rated AWM.
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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.


imperial metric
Stock # 56528405 56528405
Size (AWG or kcmil) 12 AWG 12 AWG
No. of Conductors 1 1
No. of Strands 1 1
Nominal Total Weight (lbs/1000') (kgs/km) 23 34 lbs/1000' kgs/km
Nom. OD (mils) (mm) 118 3.02 mils mm
Allowable Ampacity at 60C 20 20
Allowable Ampacity at 75C 20 20
Allowable Ampacity at 90C 20 20
UPC # 032886224799 032886224799

Standards & References

Southwire® SIMpull THHN® copper conductors comply with the following:

  • ASTM - B3, B8, and B787 (19 Wire Combination Unilay-Stranded)
  • UL Standards 83, 758, 1063, and 1581
  • CSA C22.2 No. 75, T90 Nylon/TWN75 Sizes through 1000 kcmil
  • NOM-ANCE 90° C
  • Federal Specification A-A-59544
  • NEMA WC-70 (ICEA S-95-658) Construction Requirements
  • National Electrical Code, NFPA 70
  • CT Rated in Sizes 1/0 AWG and larger
  • VW-1 - Sizes 14 through 1 AWG
  • FT1 - All Sizes
  • Sunlight Resistant – Sizes 2 AWG and larger
  • AWM - Sizes 14 through 6 AWG
  • MTW - Stranded Constructions Only
  • RoHS/REACH Compliant


Southwire® SIMpull THHN® copper conductors are made with soft drawn copper. Sizes 14 through 4/0 AWG use a combination-unilay stranding while 250 kcmil and larger sizes use a compressed copper stranding. The wire is covered with a tough heat and moisture resistant PVC insulation with an overall nylon jacket utilizing SIMpull® Technology. Available in black, white, red, blue, purple, green, yellow, orange, brown, and gray. Also available in striped configurations. Some colors are subject to economic order quantity. Marked as THHN in all sizes. Also marked as THWN-2 in sizes 8 AWG and larger or marked as THWN in sizes 14, 12, and 10 AWG. Marked sunlight resistant in sizes 2 AWG and larger. Sizes 14, 12, and 10 AWG are available with SIMpull® Technology only in SIMpull BARREL™ cable drum or SIMpull® CoilPAK™ configurations.