Our premium quality and state-of-the-art machinery enables American Bare Conductor to offer high quality building wire products that exceeds industry standards backed by excellent customer service.

THHN/MTW/THHN-2

Specifications and Standards

  • UL Standard 83 - Thermoplastic Insulated Wires and Cables
  • UL Standard 1063 - Machine Tool Wires and Cables
  • UL Standard 66 - Fixture Wire
  • UL Standard 758 - AWM

Construction

  • Soft Annealed bare copper (per ASTM B-3) solid or standard (per UL 83)
  • Insulation of high quality VW-1 or CT rated PVC (polyvinyl chloride) compound
  • Dry rated 90°C, Wet rated 75°C for THWN
  • Wet rated 90°C for THWN-2
  • Outside jacket of clear, heat stabilized, abrasion resistant nylon
  • Rating at 600 Volts

Applications

  • In accordance with National Electrical Code (NEC) 600 volt use in new construction, remodel or repair
  • Used in applications where the maxium operating temperature does not exceed 75°C THWN, 90°C THWN-2 in wet locations and 90°C in dry locations
  • Suitable for use in conduit and raceways installed underground, wet locations and/or where condensation and moisture may occur
  • Suitable for power and lightning in commercial, industrial and residental installations and appliance wire applications
  • Suitable for use in cable trays 1/0 and larger
  • To be used in compliance with NEC article 310 - "Conductors for General Wiring" and article 210 - "Branch Circuits"
Size(AWG or kcmil) Number of Strands Conductor Size(mm2)
Insulation Thickness(inches)
PVC Nylon
Outside Diameter
(inches) (mm)
Allowable
Ampacity
60°C 75°C 90°C
Approx. Net Weight(lbs./1000 ft.)
14 Solid 2.08 .015 .004 .101 2.57 15 15 15 15
12 Solid 3.31 .015 .004 .120 3.05 20 20 20 23
10 Solid 5.26 .020 .004 .149 3.78 30 30 30 37
14 19 2.08 .015 .004 .109 2.77 15 15 15 17
12 19 3.31 .015 .004 .127 3.23 20 20 20 24
10 19 5.26 .020 .004 .160 4.07 30 30 30 38
8 19 8.37 .030 .005 .212 5.39 40 50 55 63
6 19 13.3 .030 .005 .248 6.30 55 65 75 95
4 19 21.2 .040 .006 .317 8.06 70 85 95 153
3 19 26.7 .040 .006 .344 8.74 85 100 110 189
2 19 33.6 .040 .006 .375 9.53 95 115 130 234
1 19 42.4 .050 .007 .435 11.05 110 130 150 299
1/0 19 53.5 .050 .007 .474 12.04 125 150 170 372
2/0 19 67.4 .050 .007 .518 13.16 145 175 195 462
3/0 19 85.0 .050 .007 .568 14.43 165 200 225 572
4/0 19 107 .050 .007 .624 15.85 195 230 260 712
250 37 127 .060 .008 .678 17.23 215 255 290 851
300 37 152 .060 .008 .730 18.55 240 285 320 1010
350 37 177 .060 .008 .777 19.74 260 310 350 1170
400 37 203 .060 .008 .821 20.86 280 335 380 1330
500 37 253 .060 .008 .902 22.91 320 380 430 1650
600 61 304 .070 .009 1.051 26.70 355 420 475 1985