Best 8 AWG THHN 500 Ft Wires for Electrical Projects
This guide highlights top 8 AWG THHN building wires in 500-foot lengths, ideal for panel wiring, circuits, and general electrical installations. We compare colors, materials, and construction to help you pick a reliable 500-foot spool that meets UL standards and offers durable insulation for 600V systems. The selections emphasize stranded copper for flexibility and nylon-coated THHN insulation for heat resistance, moisture protection, and long-term performance.
| Product | Brand | Length | Conductor | Color |
|---|---|---|---|---|
| Building Wire, THHN, 8 AWG, Red, 500ft | Southwire | 500 ft | 19/Stranded | Red |
| Southwire 500 ft. 8/1 THHN Stranded Wire Red | Southwire | 500 ft | 8 AWG, Stranded | Red |
| Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V Black | Nassau Electrical Supply | 500 ft | 8 AWG, Stranded Copper | Black |
| Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V White | Nassau Electrical Supply | 500 ft | 8 AWG, Stranded Copper | White |
| Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V Green | Nassau Electrical Supply | 500 ft | 8 AWG, Stranded Copper | Green |
Product highlights below cover five strong choices that meet typical electrical code and performance expectations for 600V THHN cable. Each entry includes length, conductor type, insulation, and typical applications, enabling straightforward side-by-side comparisons.
Building Wire, THHN, 8 AWG, Red, 500ft
Brand: Southwire. This 8 AWG THHN wire uses a PVC insulation jacket with a Nylon outer jacket for added abrasion resistance. It is rated up to 600VAC and features a 19-strand configuration, delivering flexibility for panel wiring, control circuits, and general 600V installations. The spool length is 500 ft, with a nominal outside diameter of roughly 0.213 inches. Temperature rating reaches 194 degrees Fahrenheit, meeting common building and electrical installation standards.
Key features: Stranded construction for easier pulling; 19 strands; Nylon jacket; Red color for circuit identification; UL listed; 500 ft spool; 600V rating; 194°F temp rating.
Southwire 500 ft. 8/1 THHN Stranded Wire Red
Brand: Southwire. This 8 AWG THHN stranded wire is designed for comprehensive electrical work where flexibility matters. The 19-strand conductor supports good conductivity and ease of routing through conduits and panels. It is specified for 600V operation and is appropriate for residential, commercial, and light industrial installations. The 500 ft length provides substantial supply for projects with multiple circuits or longer runs.
Key features: 19 strands; 8 AWG conductor; 500 ft length; Red insulation; 600V rating; Stranded design for flexibility.
Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V Black
Brand: Nassau Electrical Supply. This THHN/THWN2 rated copper wire offers a durable stranded copper conductor with 600V capability. The black jacket provides standard identification for circuits requiring dark-colored insulation. With a total weight around 30 pounds for the 500 ft spool, it suits branch circuits, panel wiring, and interior building installations where reliable copper conductors are needed.
Key features: Copper conductor; THHN/THWN2 rating; 600V; Stranded copper; 500 ft length; Black color.
Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V White
Brand: Nassau Electrical Supply. This 8 AWG THHN stranded copper wire is listed for 600V operation and uses copper as the conductor material. The white jacket is commonly used for color-coding in electrical panels and wiring runs. The spool size is 500 ft, providing ample length for multiple branch circuits or larger projects requiring THHN insulation.
Key features: 8 AWG copper; Stranded; THHN/THWN2; 600V rating; 500 ft; White jacket.
Nassau Electrical Supply 500FT 8 AWG THHN Stranded Copper Building Wire 600V Green
Brand: Nassau Electrical Supply. This green THHN-insulated copper wire is designed for 600V systems with a stranded copper conductor. The color aids in circuit identification and safety practices in panels and wiring layouts. The 500 ft spool offers a practical supply for medium to large projects, ensuring consistent insulation, temperature resistance, and compliance with standard building codes.
Key features: 8 AWG copper; Stranded; THHN/THWN2; 600V rating; 500 ft; Green jacket for identification.
Building Wire, Thhn, 8 Awg, Blue, 500Ft
Brand: Southwire. This blue 8 AWG THHN wire is designed for industrial and building wiring needs, featuring a nylon-coated insulation suitable for damp or challenging environments. The 500 ft spool supports longer runs and fewer spool changes. It aligns with typical 600V electrical requirements and is suitable for panel wiring and other high-heat applications where THHN insulation is advantageous.
Key features: Nylon-coated THHN insulation; 8 AWG; 500 ft; Blue jacket; 600V rating; Southwire branding.
8 AWG THHN Stranded Bare Copper Wire 100FT Green Grounding Wire
Brand: XRDS -RF. This 8 AWG stranded bare copper wire uses THHN insulation for 600V applications, and is explicitly marketed for grounding and panel wiring. The product emphasizes high conductivity through bare copper conductors and THHN insulation for durability in challenging environments. Length is 100 ft, which suits grounding runs or smaller projects requiring a copper grounding conductor.
Key features: Bare copper conductor; THHN insulation; 8 AWG; 100 ft; 600V rating; Green jacket for grounding use.
Buying Guide
When selecting an 8 AWG THHN 500 ft wire, consider these factors:
- Conductor composition: Copper is common for reliability; copper-clad alternatives may differ in conductivity.
- Insulation and jacket: Nylon-coated THHN offers heat and moisture resistance; color-coding aids safety and organization.
- Voltage rating: Most building wires are rated for 600V; confirm compatibility with your system.
- Stranded vs solid: Stranded wires are easier to route in crowded panels and conduits; solid wires are stiffer and oriented for longer runs.
- Colors and identification: Color coding (red, black, white, green/blue) helps distinguish circuits and grounding paths.
- Quantity and length: 500 ft spools reduce splicing and replacements; ensure you have adequate length for a given project.
- Compliance: Look for UL listing and compliance with local electrical codes and standards.
- Application environment: Consider temperature ratings and outdoor or indoor exposure, moisture, and potential chemical exposure.