“The industry standard for lightweight, cost-effective subpanel feeds, commercial equipment power connections, and branch circuit wiring. Engineered for reliable power distribution inside conduit and raceways, this 4 AWG compact-stranded aluminum wire features dual THHN (dry) and THWN-2 (wet) temperature ratings. Protected by a heat- and moisture-resistant PVC insulation and a slick, abrasion-resistant nylon outer jacket, it pulls smoothly without requiring pulling lubricant.”

Key Features & Benefits: 4 AWG Aluminum THHN / THWN-2 Building Wire

4 AWG Aluminum THHN/THWN-2 electrical wire delivers dependable 600V power distribution for secondary panels, heavy equipment, and branch circuits at a fraction of the weight and cost of copper conductors. Designed for installation in conduit, cable trays, and approved raceways, it provides a reliable, code-compliant solution for commercial buildings, workshop circuits, and agricultural equipment.

Featuring compact-stranded AA-8000 series aluminum alloy conductors, 4 AWG THHN offers exceptional flexibility and long-term connection reliability. The durable PVC insulation and slick nylon jacket provide high resistance against heat, moisture, gasoline, oil, and mechanical friction during tough conduit pulls.

• Dual 90C Wet/Dry Rating: Dual-rated as THHN for dry locations up to 90C and THWN-2 for wet or dry locations up to 90C (600V maximum).

• AA-8000 Series Aluminum Alloy: Manufactured with high-grade compact-stranded AA-8000 series aluminum for dependable electrical conductivity, reduced weight, and easier handling.

• Low-Friction Nylon Outer Jacket: Abrasion-, heat-, and moisture-resistant PVC insulation encapsulated in a clear, slick nylon jacket that allows installation without pulling lubricant.

• Cut to Length by the Foot: Order only the exact footage required for your run, eliminating jobsite waste and unused spools.

Technical Specifications: 4 AWG Aluminum THHN / THWN-2 Wire

• Part Number Reference: 4-01AL-THHN

• Application: General-purpose 600V building wire applications in new construction or rewiring for wet or dry locations.

• Conductor Size: 4 AWG.

• Conductor Material: Compact Bare AA-8000 Series Aluminum (Class B Stranded).

• Conductor Diameter: 0.213 inches.

• Voltage Rating: 600 Volts Maximum.

• Insulation Material: Polyvinyl Chloride (PVC).

• Insulation Thickness: 0.040 inches.

• Jacket Material: Clear Abrasion, Heat, & Moisture-Resistant Nylon.

• Jacket Thickness: 0.006 inches.

• Overall Diameter: 0.305 inches.

• Net Weight: 62 lbs per 1,000 ft.

• Ampacity (60C Conductor Rating – NEC): 55 Amps.

• Ampacity (75C Conductor Rating – NEC): 65 Amps.

• Ampacity (90C Conductor Rating – NEC): 75 Amps.

• Compliance & Standards: UL 83, UL 1685, CUL, CSA C22.2 No. 75, NEC, CEC, NEMA WC-70/ICEA S-95-658, ASTM B800, ASTM B801, ASTM B836, Federal Spec AA-59544, VW-1/FT1 Flame Test, Sunlight Resistant, Gas & Oil Resistant II.

Common 4 AWG THHN / THWN-2 Applications

• Subpanel Feeder Runs: Power feeders connecting main service disconnects to secondary subpanels in workshops, detached garages, sheds, and commercial spaces.

• Commercial Equipment & Machinery Feeds: Dedicated power runs for large HVAC units, industrial air compressors, electric welders, and commercial machinery disconnects.

• Conduit & Underground Raceway Runs: Power distribution pulled through PVC, EMT, or rigid metal conduit for outdoor equipment, exterior lighting runs, and underground branch circuits (when installed in wet-rated conduit).

• Agricultural & Utility Power Circuits: Feeder circuits for barn distribution subpanels, commercial well systems, solar array combiner box connections, and secondary utility controls.

Technical Note:All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.

**Ampacities shown are for general use as specified by the National Electrical Code 2017 Edition, Section 310.15 and 240.4(D). Unless the equipment is marked for use at higher temperatures, the conductor ampacities shall be limited to the follwing per NEC 110.14(C): 60C – When terminated to equipment for circuits rated 100 amperes or less marked for 14 through 1 AWG conductors. 75C – When terminated to equipment for circuits rated over 100 amperes or marked for conductors larger than 1 AWG. 90C – THHN dry locations and THWN wet or dry locations for ampacity adjustment purposes using NEC section 310.15.