Copperweld THHN/THWN-2 combines an 8000-series aluminum core with a metallurgically bonded copper exterior, bringing the material advantages of both metals together in a single conductor. That bimetallic construction gives commercial and industrial teams a trusted CCA solution to manage material costs, optimize electrical performance and improve installation efficiency.

Copperweld’s CCA THHN/THWN-2 offering spans 12 AWG through 1 AWG, with solid and stranded constructions and a wide range of configurations to serve conductor needs across commercial and industrial electrical systems.

Copperweld CCA THHN/THWN-2 conductors are designed for use in raceway systems for branch circuits, feeders and equipment connections across commercial facilities, industrial plants and select residential applications. The THHN/THWN-2 designation identifies conductors rated for use in both wet and dry locations, subject to applicable NEC requirements. For specific permitted applications, refer to NEC Article 310.

Product Specifications:

• Voltage Rating: 600V
• Conductor Construction: Solid or stranded annealed Copper-Clad Aluminum
• Insulation: Color-coded PVC with a heat-stabilized nylon jacket
• Standards: UL 83, UL 1581 and ASTM B566
• Compliance: RoHS and REACH compliant

Product Offering:

Copperweld CCA UF-B Cable uses 1/6th the amount of copper when upsized two AWG sizes against copper conductors, as is required by the NEC for most electrical circuits. This upsizing provides improved electrical performance to equivalently rated copper conductors while also reducing the financial impact of volatile price fluctuations experienced with copper products.

Availability & Packaging:

• Standard Colors: Black, blue, brown, gray, green, orange, purple, red, white and yellow. Additional colors are available upon request.
• Standard Lengths: 500, 1,000, 2,500 and 5,000 feet.
• Packaging: Hand coils, plastic spools and wooden reels.
• Additional Options: Other stranding, packaging options and denominations are available upon request.

Why Copperweld THHN/THWN-2 Is a Smarter Choice for Commercial and Industrial Applications

• Long conductor runs make voltage drop an important consideration. Copperweld CCA provides less voltage drop than equivalently rated copper.* That advantage becomes increasingly meaningful over longer distances, making CCA particularly well suited to conductor-intensive commercial and industrial applications.
• Every wire must be transported, staged, routed and pulled. That’s why the lighter weight of CCA provides a practical advantage for crews working with substantial conductor quantities across long and complex installations.
• Lower scrap value helps reduce theft incentives. This is an important consideration when substantial quantities of conductor may be staged or installed across commercial and industrial jobsites that are often unattended after hours.

Technical Confidence Behind EverySpecification

For designers and specifiers, Copperweld THHN/THWN-2 provides the documented standards, listings and technical guidance needed to incorporate CCA confidently into the electrical system.

• Standards: Copperweld THHN/THWN-2 is manufactured to UL 83 and UL 1581, while Copperweld CCA conductors used in finished THHN/THWN-2 products are manufactured to ASTM B566.
• Listings: Copperweld THHN/THWN-2 carries UL listings E510284 and E538020 and ETL listing 5021266. Copperweld CCA conductors carry their own UL Recognized Component listing under DVVV2.
• Guidance: Clear identification and technical guidance support connections and terminations in the field. For splicing, look for the CC mark on the connector or packaging, which identifies connectors tested for use with CCA. CC-rated connectors can be used for CCA-to-CCA, copper-to-CCA and copper-to-copper splices, allowing the same connector to accommodate each of these common wiring configurations.

Why Commercial and Industrial Teams Trust Copperweld

For more than a century, Copperweld has pioneered the science of bimetallic conductors. That expertise extends well beyond developing the conductor itself, with manufacturing, testing and technical capabilities built around ensuring consistent performance from production through installation.

Quality is continuously verified throughout manufacturing, with in-line testing built into the production process. Copperweld’s Compliance Lab adds another level of technical validation as both a UL Data Acceptance Program (DAP) laboratory and Intertek ETL Satellite laboratory, with capabilities for qualification, certification and comparative testing.

That combination of bimetallic expertise, manufacturing control and advanced testing gives Copperweld an unusually deep understanding of the conductor technology behind its building wire — and the ability to continually validate how its products perform. Copperweld is the only U.S. manufacturer of CCA building wire, including CCA THHN/THWN-2, bringing that expertise directly to the finished product.

Copperweld also remains actively involved in the codes, standards and technical work surrounding CCA, helping advance understanding of a conductor technology the company has spent generations developing.

For designers, contractors and inspectors, that means confidence extends beyond the product listings. It’s backed by Copperweld’s engineering expertise, manufacturing controls, testing capabilities and technical support — all working together to make CCA easier to specify, understand and put to work.

A Smarter Approach to THHN/THWN-2

For commercial and industrial projects, Copperweld CCA THHN/THWN-2 offers practical advantages over traditional solid-copper conductors from procurement through installation:

• Smarter material spend: Reduced conductor material costs leave more room in the electrical budget to absorb other project expenses or invest where those dollars deliver greater value.
• Cost stability: Reduced reliance on solid copper helps limit exposure to copper price volatility and supports more predictable material costs.
• Lower voltage drop: Copperweld CCA provides less voltage drop than equivalently rated copper, an advantage that becomes increasingly meaningful across longer runs.*
• Installation efficiency: Lighter conductor weight supports easier handling, staging, routing and pulling across conductor-intensive projects.
• Reduced theft incentives: Lower scrap value than solid copper helps reduce theft incentives and the potential for associated replacement costs and schedule disruptions.
• Specification confidence: Established standards, NRTL listings, clear product markings and documented technical guidance support confident specification and installation.
• Bimetallic expertise: More than a century of Copperweld experience, backed by manufacturing controls, advanced testing capabilities and technical support.

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