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$1.77 /ft.

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THHN Stranded Building Wire. Cut to length - sold by the Foot.

Min: 10 ft., Max: 10000 ft. To order multiple lengths, simply enter the desired footage into the quantity fields. Each length will be delivered on its own spool.
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3 AWG THHN/THWN-2 Wire (By-the-foot)


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#3 THHN/THWN-2 Wire

Cut to length - sold by the foot. Enter the desired footage in the QTY box.

Minimum 1' to maximum 5000'. Please call for longer put ups.


Type THHN/THWN-2 building wire is intended for general purpose applications as defined by the National Electrical Code (NEC). Type THHN-THWN-2 is permitted for new construction or rewiring for 600-volt applications. Applications requiring Type THHN or THWN-2, the conductor is appropriate for use in wet or dry locations at temperatures not to exceed 90ºC or not to exceed 75ºC in oil or coolants. Applications requiring Type MTW conductor is appropriate for use in dry locations at 90ºC, or not to exceed 60ºC in wet locations or where exposed to oils or coolants. Applications requiring Type AWM conductor is appropriate for use at temperatures to not exceed 105ºC in dry locations.

Also Known As:

Copper wire, THWN, building wire, hook up wire, conduit wire, bathtub wire, lighting wire, nylon copper wire, construction cable, etc...


Nylon outer jacket for easy pulling. VW-1 rated 14 AWG - 8 AWG. All sizes are rated gasoline and oil-resistant II.


A tough, polyamide, Nylon outer covering per UL-1063 and UL-83.


Underwriters Laboratories Standards UL-83, UL-1063, UL-758

AWM Spec 1316, 1317, 1318, 1319, 1320, 1321

ASTM Stranding Class B3, B8, B787

Federal Specification A-A-59544

Canadian Standards Association C22.2 No. 75

NEMA WC70/ICEA S-95-658

Institute of Electrical and Electronics Engineers



Solid, uncoated copper conductors per ASTM-B3

Stranded, uncoated copper conductors per ASTM-B3, ASTM-B787 and ASTM-B8


Color-coded Polyvinyl Chloride (PVC), heat and moisture-resistant, flame-retardant compound per UL-1063 and UL-8

3 AWG THHN/THWN-2 Specifications*:

Size: 3 AWG
Number of Strands: 19
Cross Section Area: 26.7 mm2
PVC Insulation Thickness (Conductor): 1.020 mm / 0.040 inches
Nylon Jacket Thickness: 0.150 mm / 0.006 inches
Outside Diameter: 8.74 mm / 0.344 inches
Weight: 0.202 lbs per ft
Allowable Ampacity: 85 Amps at 60ºC / 100 Amps at 75ºC / 110 Amps at 90ºC

*Data provided on this page is subject to change based on different manufacturers variances.

More Information
Cable TypeTHHN/THWN-2
Wire Size3 AWG
# of Conductors1 Conductor
Conductor MaterialBare Copper
Stranded or Solid Stranded
Number of Strands19
O.D. (Inches)0.344
Ampacity 110
Temp. Rating90°C
Insulation MaterialPVC - Polyvinyl Chloride
Jacket MaterialNylon
Direct BurialNo
Location UseWet, Dry
Indoor/Outdoor UseIndoor, Outdoor
StandardsUL Listed, CSA Certified
FeaturesWater Resistant, Oil & Gas Resistant, Heat Resistant