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Building Wire

Aluminum THHN THWN-2 Wire 600V

600V Aluminum THWN-2 PVC+Nylon Building Wire — UL-83, 90°C Wet+Dry, AWG 1/0-800 MCM

Voltage: 600V, UL-83 Listed, NEC service entrance & feeder rated
Conductor: Compacted stranded aluminium alloy, 19-96 strand, ~50% weight of copper THHN
Insulation: PVC (0.76-1.27mm) + Nylon jacket (0.13-0.25mm) — same build as copper THHN
THWN-2 Rating: 90°C wet AND dry — single ampacity column (vs copper THWN 75°C wet)
Range: 12 sizes AWG 1/0-800 MCM (50-400mm²), 157-1,300 kg/km
1000m/roll: Standard reel length for all sizes, export wooden case
Standard: UL-83 (aluminium conductor), NEC Article 310 compliant

Product Overview

Aluminum THHN THWN-2 Wire 600V is a stranded aluminium conductor building wire with PVC+Nylon insulation manufactured to UL-83 — the aluminium counterpart to the copper THHN/THWN wire that has dominated North American conduit and raceway installations for decades. The THWN-2 designation (aluminium-specific rating) provides 90°C operation in both wet and dry locations — superseding the standard THWN 75°C wet rating that applies to copper THHN/THWN — giving aluminium THWN-2 the same 90°C ampacity regardless of installation environment. For equivalent current-carrying capacity, aluminium THWN-2 is approximately half the weight of copper THHN (2.70 vs 8.89 g/cm³) and roughly one-third the conductor material cost, making it the dominant choice for feeder circuits, service entrance conductors, and large distribution wiring where the larger cross-section required for the same ampacity is acceptable within the allocated conduit space.

The three-layer construction mirrors the copper THHN build: (1) a compacted stranded aluminium alloy conductor per UL-83 aluminium conductor requirements — compacted stranding with count codes 7, 19, 37, 61 ranging up to 84-strand and 96-strand compact configurations for the largest sizes, which reduce the conductor diameter versus standard concentric-lay stranded aluminium for the same cross-section, (2) a colour-coded PVC insulation layer providing the primary dielectric strength with insulation thickness matching copper THHN of equivalent AWG (0.76mm for AWG 8-2, 1.02mm for AWG 1-4/0, 1.27mm for 250-500 MCM), and (3) an extruded Nylon (polyamide) outer jacket providing mechanical toughness. The range covers 12 sizes from AWG 1/0 (≈50mm²) to 800 MCM (≈400mm²) — aluminium THWN-2 is manufactured only in sizes where the weight advantage materially benefits the installer: below AWG 1/0, the weight saving is negligible and copper's superior termination convenience dominates. Standard reel lengths are 1000m per spool across all sizes, with export wooden case packaging.

Aluminum THHN THWN-2 Wire — multi-strand silver-grey aluminium conductor with dark green PVC+Nylon insulation, stripped end showing concentric strand rings

Outer Insulation — Dark forest green PVC+Nylon, cylindrical with 3D gradient shading, thin grey strip marks the stripped section boundary at right
Aluminium Conductor — Silver-grey stranded core, multiple concentric rings visible at stripped end, longitudinal strand lines create ribbed texture — visibly lighter in colour than copper's reddish-brown
Stripped-End Cross-Section — Inner + outer concentric rings of circular strand ends confirm multi-layer compact stranding (19+ strand configuration)

Stranded Aluminium (Compacted)

Compacted stranded aluminium alloy — 7 to 96 strands with compact lay. ~50% weight of copper THHN same AWG. THWN-2 90°C wet+dry rating.

PVC + Nylon 3-Layer Build

PVC insulation (0.76-1.27mm) + Nylon jacket (0.13-0.25mm). Same mechanical protection as copper THHN. Gasoline, oil, and abrasion resistant per UL-83.

THWN-2: 90°C Wet + Dry

Aluminium THWN-2 rated 90°C in BOTH wet and dry locations — unlike copper THWN at 75°C wet. Single 90°C ampacity column for all installation environments.

12 Sizes AWG 1/0 - 800 MCM

50mm²-400mm², aluminium-only range — manufactured where weight advantage matters. 84 & 96-strand compact for largest sizes.

~50% Weight vs Copper THHN

Al 2.70 g/cm³ vs Cu 8.89 g/cm³. 100m of 500 MCM aluminium THWN-2 weighs ~80 kg vs ~145 kg for copper — a meaningful handling difference on the job site.

UL-83 Listed (Aluminium)

UL Listed per UL-83 aluminium conductor requirements. NEC compliant for service entrance, feeder, and branch circuit applications per Article 310.

Technical Characteristics

Rated Voltage	600V
THWN-2 Rating (Aluminium)	90°C — wet AND dry locations
Conductor Material	Compacted stranded aluminium alloy per UL-83 aluminium conductor requirements
Construction	3-layer: aluminium core → PVC insulation → Nylon jacket
Flame Resistance	UL-83 VW-1 vertical flame test
Standard Length	1000m per spool (all sizes)
Standard	UL-83

Applicable Standard

Standard	Scope
UL-83	UL standard for thermoplastic insulated wires and cables — covers both copper and aluminium conductor THHN/THWN/THWN-2 construction, testing, and listing per NEC Article 310.

Aluminum THWN-2 vs Copper THHN — the ampacity trade-off: For the same AWG size, aluminium THWN-2 carries approximately 78-82% of the ampacity of copper THHN due to aluminium's higher resistivity (2.82 vs 1.68 μΩ·cm). Example: 2/0 AWG aluminium = 150A vs copper = 175A. To match copper's 175A, you would specify 3/0 AWG aluminium (165A) or 4/0 AWG aluminium (180A) — one to two AWG sizes larger. The weight savings still hold because aluminium's density advantage (2.70 vs 8.89 g/cm³) outweighs the larger size penalty for all practical conductor sizes. The THWN-2 90°C wet+dry rating is unique to aluminium — copper THWN is limited to 75°C wet unless specifically manufactured as THWN-2. Aluminium's 90°C wet rating eliminates the dual-column ampacity table, simplifying circuit design to a single 90°C value.

Technical Specifications

Compacted stranded aluminium alloy per UL-83. PVC+Nylon insulation. THWN-2 ampacity = 90°C. All 12 sizes stranded only — aluminium is not manufactured in solid conductor form for distribution sizes. Standard length 1000m per spool. Stranding codes: 7, 19, 37, 42, 61, 84, 96 — higher strand counts with compact lay reduce conductor diameter.

Size (AWG/MCM)	mm²	Stranding	Insul. PVC (mm)	Nylon (mm)	O.D. (mm)	Insul. Res. (MΩ/km)	Amp 90°C (A)	Weight (kg/km)
1/0	50	19	1.02	0.13	13.2	0.0082	120	157
2/0	60	19	1.02	0.13	14.1	0.0082	135	203
3/0	80	19	1.02	0.13	15.5	0.0082	155	257
4/0	100	19	1.02	0.13	17.2	0.0082	180	293
250 MCM	125	37	1.27	0.18	19.5	0.0082	205	398
350 MCM	175	37	1.27	0.18	22.2	0.0082	250	579
400 MCM	200	37	1.27	0.18	24.0	0.0082	270	662
500 MCM	250	37	1.27	0.20	25.3	0.0082	310	890
600 MCM	300	61	—	—	27.2	0.0082	340	971
625 MCM	310	42	1.27	0.25	30.0	0.0082	365	1,008
700 MCM	350	61	1.27	0.25	31.0	0.0082	375	1,138
800 MCM	400	96	1.27	0.25	33.2	0.0082	405	1,300

Compacted stranding — the OD reduction advantage: 96-strand compacted aluminium conductor (800 MCM) achieves a smaller overall diameter than standard concentric-lay 61-strand would at the same cross-section — the compacted strands are partially trapezoidal rather than circular, filling the inter-strand voids and reducing the conductor OD by 5-8%. This enables aluminium THWN-2 to fit within the same conduit diameter as the equivalent-ampacity copper THHN (which is one to two AWG sizes smaller) — the compact stranding compensates for aluminium's inherently larger conductor diameter at equal ampacity. The 84 and 96-strand compact constructions are unique to the aluminium THWN-2 product line — no copper THHN equivalent exists because copper's lower resistivity already achieves the necessary OD with conventional stranding. 600 MCM row lacks PVC and Nylon thickness data (—) on the reference page — these are typically the same as adjacent sizes (1.27mm / 0.25mm).

Packaging & Delivery

Parameter	Standard
Package	1000m per spool, export wooden case & pallet (all 12 sizes)
Spool Marking	Manufacturer, THWN-2, 600V, AWG/MCM, aluminium, 90°C, length, weight, batch, UL marks
Colour Options	Standard NEC THHN colours: black, white, red, blue, green, yellow, brown, orange, grey
Conductor Marking	AL THWN-2, AWG size, 600V, 90°C, UL mark printed on Nylon jacket
Delivery Condition	Factory-new, tested per UL-83 aluminium conductor requirements, UL Listed

Typical Applications

Aluminum THWN-2 wire is the standard aluminium building wire for North American feeder circuits, service entrances, and large distribution wiring where weight and material cost savings justify one or two AWG size increases:

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Service Entrance Conductors

Standard aluminium THWN-2 for overhead and underground service entrance — 90°C wet+dry rating qualifies for any service environment. The dominant aluminium building wire application by installed tonnage.

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Feeder Circuits

Large feeder circuits from main switchboard to distribution panels — AWG 1/0 to 800 MCM covers every commercial and industrial feeder size. ~50% weight advantage vs copper simplifies handling and installation.

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Commercial Distribution Wiring

Cost-effective aluminium for building distribution where the larger AWG size (for equivalent ampacity) is accommodated in the conduit design. Significant material cost savings on large commercial projects.

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Feeder & Branch Circuits

General wiring for feeder and branch circuits per NEC Article 310. UL Listed for full conduit fill and cable tray installation per NEC requirements.

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North American NEC Markets

UL-83 Listed for all US and Canadian jurisdictions. THWN-2 90°C rating eliminates the dual-column ampacity table — one ampacity, all environments.

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Cost-Optimised Projects

Aluminium THWN-2 with 96-strand compact lay matches copper conduit dimensions at equivalent ampacity — the economic sweet spot for competitive-bid commercial electrical projects.

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Frequently Asked Questions

1. What is your minimum order quantity (MOQ)?

As a factory, we offer flexible MOQ depending on the cable type. For standard stock items, MOQ is low; for customized specifications, please contact our sales team for a detailed quote.

2. Do your cables meet international certification standards?

Yes, Qiangli cables are manufactured in compliance with international standards such as UL, CE, TUV, and VDE. We provide full test reports and certificates upon request.

3. Can you provide customized cable solutions (OEM/ODM)?

Absolutely. We have a dedicated R&D team that can customize cable structure, material, color, and printing to meet your specific project needs.

4. What is the typical lead time for an order?

For standard products, lead time is usually 7-15 days. For large-scale project orders or customized products, it typically ranges from 20 to 30 days.

5. Do you offer free samples for quality testing?

Yes, we provide free samples for most standard cables. You only need to cover the international courier costs. Contact us to arrange your sample shipment.