THHN solid wire is a common choice for electrical wiring in homes and buildings. It offers durability, safety, and easy installation for many electrical projects.
THHN stands for Thermoplastic High Heat-resistant Nylon-coated wire. It uses solid copper conductors covered with a tough nylon jacket. This wire handles heat up to 90°C and works well in dry and damp locations. Solid wire means a single copper strand, which provides reliable conductivity and strength.
THHN solid wire comes in various sizes like 12 AWG and 10 AWG, suitable for different electrical needs. It is widely used for lighting, control systems, and grounding. Brands like Southwire, Remington, and Cimple offer trusted options in different lengths and colors. Choosing the right THHN solid wire ensures safety and performance in residential, commercial, or industrial wiring jobs.
Southwire 50 Ft. 12 Black Solid Cu Thhn Wire

The Southwire 11587383 50 ft. 12 Black Solid CU THHN Wire is ideal for professional electricians, contractors, and DIY enthusiasts who require reliable and durable wiring for residential or commercial electrical projects. Those looking for high-quality, heat-resistant wiring that ensures safety and long-term performance will find this product highly suitable.
Pros:
- Made from high-quality solid copper (CU) for excellent conductivity.
- THHN insulation offers superior heat and moisture resistance.
- 50 ft. length provides ample wire for various installations.
- Black color for easy identification in wiring systems.
- Compact dimensions and lightweight design for easy handling and installation.
- Manufactured by trusted brands Southwire and Coleman Cable.
Cons:
- Solid wire may be less flexible compared to stranded wire in tight spaces.
- Limited to indoor or protected outdoor use due to insulation type.
The Southwire 11587383 wire features solid copper conductors that ensure maximum electrical conductivity and minimal power loss. Its THHN insulation is designed to withstand high temperatures and resist moisture, making it a dependable choice for a variety of electrical installations. The 12-gauge thickness balances current capacity with ease of installation, suitable for lighting and outlet circuits.
Additionally, the wire’s black color aids in easy identification during wiring projects, simplifying troubleshooting and maintenance. The product’s compact size and manageable weight make it convenient to handle, reducing installation time and effort. Backed by reputable manufacturers like Southwire and Coleman Cable, this wire offers consistent quality that professionals and DIY users can trust for safe and efficient electrical work.
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Southwire 25 Ft. 12 Green Solid Cu Thhn Wire

The Southwire 25 ft. 12 Green Solid CU THHN Wire is ideal for electricians, contractors, and DIY enthusiasts who require reliable and durable wiring for residential or commercial electrical projects. This product is especially suited for those looking for high-quality 12-gauge copper wire with excellent insulation, suitable for a variety of indoor applications.
Pros:
- Durable solid copper conductor for excellent electrical conductivity
- THHN insulation provides resistance to heat, moisture, and chemicals
- 25 ft. length offers convenience for medium-scale wiring tasks
- Green color for easy identification in wiring setups
- Compact and lightweight design for easy handling and installation
Cons:
- Limited to indoor use due to THHN insulation specifications
- Solid wire may be less flexible compared to stranded wire options
- Only available in green, which might not suit all color-coding needs
The Southwire 25 ft. 12 Green Solid CU THHN Wire is manufactured by Southwire, a trusted brand known for quality electrical products. The wire features a solid copper core that ensures efficient and consistent electrical flow, reducing resistance and heat buildup. The THHN insulation adds an extra layer of protection, making it suitable for dry and damp locations and resistant to heat and chemical exposure, which enhances safety and longevity.
With its 25-foot length and standard 12-gauge size, this wire is perfect for a wide range of wiring applications, from household outlets to commercial circuits. The green color coding simplifies installation by clearly identifying grounding conductors, helping users maintain proper wiring standards. Overall, this product combines reliability, safety, and ease of use, making it a valuable addition to any electrical toolkit.
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Southwire 25 Ft. 12/3 Tri-wire

The Southwire 25 ft. 12/3 Black/White/Green Solid CU THHN Tri-Wire is ideal for homeowners, electricians, and DIY enthusiasts who require durable and reliable wiring for residential or commercial electrical projects. This product is perfect for those seeking high-quality THHN copper wiring that ensures safety and efficiency in electrical installations.
Pros:
- Made with solid copper conductors for excellent conductivity and durability
- THHN insulation provides heat and moisture resistance, increasing wire longevity
- Includes color-coded wires (black, white, green) for easy identification during installation
- 25 ft. length offers flexibility for various wiring needs
- Manufactured by Southwire, a trusted brand in electrical products
Cons:
- Limited to 12/3 gauge, which may not be suitable for higher amperage applications
- Only available in black, white, and green colors, which may not fit all wiring color preferences
The Southwire 12/3 THHN tri-wire is crafted with solid copper conductors, ensuring superior electrical conductivity and minimal resistance. The THHN insulation adds an extra layer of protection against heat, moisture, and abrasions, making it a reliable choice for indoor and outdoor wiring. Its tri-wire configuration with black, white, and green color coding simplifies the wiring process, helping users identify the hot, neutral, and ground wires quickly and safely.
With a length of 25 feet, this wire provides ample reach for various electrical tasks, whether you are wiring outlets, switches, or light fixtures. The robust construction from the renowned Southwire brand guarantees compliance with industry standards, promoting safety and efficiency in every installation. Overall, this product is a practical and dependable option for anyone looking to execute electrical projects with confidence and precision.
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Remington Industries 12sldblathhn100 12 Awg Gauge Solid Thhn Building Wire

The Remington Industries 12SLDBLATHHN100 12 AWG Gauge Solid THHN Building Wire is ideal for electricians, contractors, and DIY enthusiasts who require durable, high-quality wiring for residential or commercial electrical projects. This product is perfect for those who need reliable and efficient wiring solutions that meet industry standards and ensure safety and performance in building applications.
Pros:
- High-quality 12 AWG gauge solid THHN wire suitable for various building wiring needs.
- 600V rating ensures it can handle high voltage safely.
- 100-foot length provides ample wire for larger projects without frequent replacements.
- Durable black insulation for added protection and easy identification.
- Compact and lightweight design (2.0 pounds) for easy handling and installation.
Cons:
- Solid wire may be less flexible compared to stranded wire, which can be challenging in tight spaces.
- Limited to indoor or conduit use as it is THHN rated, not suitable for direct burial or outdoor exposure.
The Remington Industries 12 AWG Solid THHN Wire stands out for its robust construction and dependable performance. Its 12-gauge thickness offers an excellent balance between current-carrying capacity and ease of installation, making it a versatile choice for a wide range of electrical wiring tasks. The THHN insulation provides resistance against heat and moisture, enhancing safety and longevity, especially in conduit or raceway installations.
Additionally, the 600V rating ensures that this wire can safely handle higher voltage applications, offering peace of mind for both professionals and hobbyists. The 100-foot length reduces the need for splicing and multiple wire runs, simplifying project management. Its black color insulation not only aids in circuit identification but also adds durability against abrasion and environmental factors, making it a reliable choice for building wiring needs.
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Thhn Wire 12 Gauge 50 Ft Ofc Electrical Wire

The THHN Wire 12 Gauge 50 FT OFC Electrical Wire is ideal for homeowners, electricians, and industrial professionals who require a reliable and durable wiring solution. This wire is perfect for those involved in residential wiring, CNC machinery setups, grounding applications, and various industrial uses, especially where a high-quality, solid copper wire is essential for safety and efficiency.
Pros:
- High-quality 12 AWG solid copper ensures excellent conductivity and durability.
- Rated up to 600V, suitable for a wide range of electrical applications.
- Nylon jacket provides enhanced protection against abrasion and environmental factors.
- 50 feet length offers flexibility for multiple wiring projects.
- White color for easy identification and neat installation.
Cons:
- May be thicker and less flexible compared to stranded wire options.
- Limited to 12 gauge size, not suitable for heavier current loads requiring thicker wire.
The THHN Wire 12 Gauge features a solid copper core that ensures superior electrical conductivity, making it highly efficient for transmitting power with minimal resistance. The wire’s nylon jacket adds a robust layer of protection, resisting wear, moisture, and chemical exposure, which is crucial for maintaining safety and longevity in both residential and industrial environments. Its white color coding simplifies identification during installation and maintenance, helping professionals organize wiring systems effectively.
This wire is rated for up to 600 volts, making it versatile enough to handle various electrical demands, including CNC machinery and grounding applications. The 50-foot length offers ample wire for typical projects without needing frequent splicing, which enhances the overall reliability of the electrical system. Whether you are upgrading your home wiring or working on an industrial setup, this 12 AWG solid copper wire combines strength, safety, and performance in one package.
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The Cimple Co 10 Feet Insulated Solid Copper Thhn/thwn Wire

The THE CIMPLE CO 10 Feet (3 Meter) Insulated Solid Copper THHN/THWN Wire is ideal for homeowners, electricians, and contractors looking for a reliable and durable electrical wire for residential, commercial, and industrial applications. This wire is perfect for those who need a high-quality 14 AWG copper wire rated for 600 volts that ensures safe and efficient grounding and wiring solutions.
Pros:
- Made in the USA ensuring high manufacturing standards and quality control
- Solid copper conductor offers excellent conductivity and durability
- Insulated THHN/THWN coating provides superior resistance to heat, moisture, and chemicals
- Versatile use suitable for residential, commercial, and industrial wiring projects
- Rated for 600 volts, supporting a wide range of electrical applications safely
- Green color insulation makes it easy to identify for grounding purposes
Cons:
- Only available in a 10 feet (3 meter) length, which may require purchasing multiple units for larger projects
- Solid copper wire is less flexible compared to stranded wire, which can make installation in tight spaces more challenging
The THE CIMPLE CO 14 AWG THHN/THWN wire features a solid copper conductor that ensures excellent electrical conductivity and long-lasting performance. Its insulated coating is designed to withstand harsh environmental conditions, including heat and moisture, making it a dependable choice for indoor and outdoor wiring needs. The 600-volt rating adds an extra layer of safety and reliability, allowing it to handle various electrical loads efficiently.
Additionally, the wire’s green insulation color is specifically used for grounding, which simplifies identification and compliance with electrical codes. Whether you are working on a new installation or upgrading existing wiring, this wire’s robust construction and versatile applications make it a valuable component for ensuring secure and efficient electrical systems. The compact 10 feet length offers convenience for smaller projects or targeted wiring tasks.
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12 Awg Thhn Wire 50ft

The 12 AWG THHN Wire 50FT is ideal for electricians, contractors, and DIY enthusiasts who require a reliable and durable wire for various electrical applications such as panel wiring, grounding, lighting circuits, and control systems. This product is perfect for those looking for a high-quality, single bare copper conductor wire with excellent insulation properties to ensure safety and efficiency in their electrical projects.
Pros:
- Durable Nylon Insulation provides enhanced protection against abrasion and moisture.
- High Conductivity due to the single bare copper conductor ensuring efficient electrical flow.
- Versatile Application suitable for panel wiring, grounding, lighting circuits, and control systems.
- 50FT Length offers ample wire for various residential and commercial projects.
- Green Color easily identifies grounding wire for safety compliance.
Cons:
- May require professional installation for complex wiring setups.
- Limited to specific electrical applications due to color coding.
The 12 AWG THHN Wire from XRDS-RF features a robust single bare copper conductor that ensures superior electrical conductivity, which is essential for reducing energy loss and maintaining circuit efficiency. The nylon insulation is designed to withstand mechanical damage and resist moisture, making it a reliable choice for both indoor and outdoor installations. Its green color coding clearly designates it for grounding purposes, helping users maintain safety standards and simplify identification during installation or maintenance.
Furthermore, the wire’s 50-foot length provides flexibility for various project sizes, whether wiring a small control panel or installing lighting circuits across multiple rooms. The combination of high-quality materials and thoughtful design makes this wire an excellent investment for anyone looking to ensure long-lasting, safe, and efficient electrical connections in their building or renovation projects.
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Remington Industries 12sldwhithhn100 12 Awg Gauge Solid Thhn Building Wire

The Remington Industries 12SLDWHITHHN100 12 AWG Gauge Solid THHN Building Wire is ideal for electricians, contractors, and DIY enthusiasts who require reliable and durable wiring for residential or commercial electrical projects. This product is perfect for those looking for a high-quality, easy-to-install wire that meets industry standards for safety and performance.
Pros:
- Manufactured by Remington Industries, ensuring trusted quality and durability.
- Rated for 600V, suitable for a wide range of electrical applications.
- Comes in a convenient 100′ length, reducing the need for multiple splices.
- 12 AWG gauge solid copper conductor provides excellent conductivity and strength.
- White color insulation allows for easy identification during installation.
Cons:
- The solid wire may be less flexible compared to stranded wire options.
- Limited color options may not suit all wiring identification needs.
- Weight of 2.0 pounds might be slightly heavy for extended handling in tight spaces.
This 12 AWG gauge solid THHN building wire is designed with durability and safety in mind. Its solid copper conductor ensures excellent electrical conductivity and mechanical strength, making it a dependable choice for wiring circuits up to 600 volts. The wire’s insulation is specifically rated to withstand heat and mechanical wear, which adds an extra layer of protection and longevity to your electrical installations.
Additionally, the 100-foot length spool minimizes the need for frequent cuts and splices, streamlining the installation process and reducing potential points of failure. Its compact dimensions and manageable weight make it convenient to transport and handle on job sites, enhancing overall efficiency. Whether for new construction or repair work, this wire offers a balance of performance, reliability, and ease of use.
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The Cimple Co 50 Ft – 10 Awg Solid Copper Wire

The THE CIMPLE CO 50 FT – 10 AWG Solid Copper Wire is ideal for electricians, contractors, and DIY enthusiasts who require a reliable and durable grounding wire for industrial or residential electrical projects. If you need a high-quality, 10 gauge wire with excellent conductivity and insulation for safe grounding applications, this product is a perfect fit.
Pros:
- Made from solid copper for superior electrical conductivity and durability
- 50 feet length provides ample wire for various grounding tasks
- THHN/THWN insulation ensures resistance to heat, moisture, and chemicals
- Green color coding clearly identifies it as grounding wire for safety compliance
- Compact dimensions and lightweight design make handling and installation easier
Cons:
- Limited to grounding applications, not suitable for power transmission
- Fixed length may require purchasing additional wire for larger projects
This 10 AWG solid copper wire by THE CIMPLE CO is engineered to meet industrial standards with its robust THHN/THWN insulation, which protects against environmental factors such as heat and moisture. This makes the wire highly reliable for grounding systems, ensuring electrical safety and preventing potential hazards. The solid copper core enhances conductivity, providing efficient grounding performance crucial for any electrical setup.
Additionally, the wire’s green insulation offers clear visual identification, which is essential for compliance with electrical codes and helps prevent wiring mistakes. The 50-foot length is sufficient for many standard grounding installations, and the wire’s manageable dimensions and weight contribute to easier handling and faster installation, saving time and effort for professionals and hobbyists alike.
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Southwire 500 Ft. 12/1 Thhn Solid Wire White

The SOUTHWIRE COMPANY LL 11588158 Southwire 500 Ft. 12/1 Thhn Solid Wire White is ideal for professional electricians, contractors, and DIY enthusiasts who require a reliable and durable electrical wire for various residential or commercial wiring projects. This product is best suited for those needing high-quality 12-gauge, 1-conductor solid wire that ensures safety and compliance with electrical standards.
Pros:
- High-quality THHN insulation provides excellent resistance to heat and abrasion.
- 500 feet length offers ample wire for extensive wiring projects without frequent replacements.
- Solid wire ensures superior conductivity and minimal electrical resistance.
- White color insulation makes it easy to identify and organize wiring setups.
- Manufactured by Southwire, a trusted brand known for durable and reliable electrical products.
Cons:
- Solid wire is less flexible compared to stranded wire, which may make installation in tight spaces more challenging.
- Relatively heavy at 11.5 pounds, which can be cumbersome for carrying and handling.
The SOUTHWIRE COMPANY LL 11588158 wire features robust THHN insulation, which protects the conductor from heat, moisture, and mechanical damage, making it suitable for use in dry and damp locations. This insulation ensures safety and longevity, reducing the risk of electrical faults. Additionally, the solid copper conductor provides excellent electrical conductivity, which translates into efficient power transmission with minimal loss.
With a generous 500-foot length, this wire allows for large-scale wiring projects without the inconvenience of multiple splices or joints, saving time and effort during installation. Its white insulation color aids in easy identification during complex wiring tasks, helping professionals maintain organized and code-compliant installations. Overall, this product combines reliability, durability, and ease of use to meet the demands of various electrical applications.
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Frequently Asked Questions
What Is Thhn Solid Wire Used For?
THHN solid wire is used in residential, commercial, and industrial electrical wiring. It handles up to 600 volts safely. It’s ideal for conduit and cable trays, providing reliable power distribution and grounding.
How Do I Choose The Right Gauge For Thhn Wire?
Choose THHN wire gauge based on current load and circuit length. For example, 12 AWG suits most residential circuits. Larger gauges like 10 AWG handle higher currents. Always follow electrical codes for safety.
Can Thhn Wire Be Used For Grounding Purposes?
Yes, green THHN solid wire is specifically designed for grounding. It ensures safe path for electrical faults, protecting equipment and people. Grounding wire size must comply with electrical code requirements.
What Colors Are Available For Thhn Solid Wire?
THHN solid wire comes in black, white, green, and multi-conductor options. Colors help identify hot, neutral, and ground wires. This simplifies installation and maintenance for electricians.
Is Thhn Wire Suitable For Outdoor Installation?
THHN wire is primarily for dry, indoor use but can be used outdoors inside conduit. For direct outdoor exposure, THWN or THHN/THWN rated wire is better due to moisture resistance. Check product ratings before use.
How Long Are Typical Thhn Solid Wire Lengths Sold?
THHN solid wire is commonly sold in lengths from 10 to 500 feet. For example, Southwire offers 25, 50, 100, and 500-foot options. Length choice depends on project size and installation needs.
Conclusion
Choosing the right THHN solid wire is important for safe and effective electrical work. The Southwire and Remington wires offer reliable options in different lengths and colors, like black, green, and white. These wires have strong copper conductors and durable nylon jackets that protect against heat and moisture.
Whether you need wire for residential, commercial, or industrial use, these products meet standard voltage ratings up to 600 volts. Solid THHN wires are easy to install and help maintain good electrical flow. They also provide good grounding and control circuit performance.
Selecting the correct gauge and length ensures your electrical project runs smoothly. Overall, these THHN solid wires combine quality, safety, and flexibility for many wiring needs. This makes them a smart choice for electricians and DIYers alike. Proper wiring helps keep homes and buildings safe and efficient.
Solid wire with proper insulation is a dependable solution for your electrical tasks.
About The Author
Jeff Grill
administrator
Hi, I’m Jeff Grill — a certified welding expert and instructor based in Long Island, NY.
With over three decades in the industry, I’m passionate about combining theoretical knowledge with hands-on experience to train the next generation of skilled welders.
I specialize in all forms of arc welding, including GMAW, GTAW, GMAW, FCAW & SAW. But my experience isn’t limited to just those—I’m also knowledgeable in oxyfuel gas welding and plasma arc cutting.
My years as a welding inspector and supervisor have honed my ability to ensure the highest standards in welding quality and safety, making me adept at executing and overseeing complex welding operations.