100 Feet 12 AWG Solid Copper THHN/THWN Wire - Grey Jacket

In this review of the 100 ft 12 AWG Solid Copper THHN/THWN Wire, the bottom line is simple: this is a dependable, American-made building and grounding conductor suited for long runs and mixed residential, commercial, and industrial use. The reviewer found the solid copper core and PVC+nylon grey jacket deliver low voltage drop and reliable grounding performance, while the 600 V / 90 C rating and UL listing make it appropriate for indoor and outdoor installations where a robust, heat- and moisture-resistant conductor is required.

Key Features

• Length and conductor: Includes 100 ft (30 m) of solid copper conductor, offering ample reach for many home or light commercial runs without splicing.
• Insulation: PVC and nylon jacket provides high heat and moisture resistance, helping the wire retain performance in varied environments.
• Ratings: Electrical rated to 600 V and 90 C, making it suitable for common branch circuits and grounding applications up to 20 A where 12 AWG is appropriate.
• Certifications: UL listed and CSA certified, with multiple safety certifications that support code-compliant installations.
• Versatility: Marked THHN/THWN so it fits conduit, cable trays, feeders, and grounding uses across residential, commercial, and industrial settings.
• Made in USA: Manufactured in the United States, which can be important for buyers prioritizing domestic production and consistent quality control.

Who It's For

This wire is aimed at electricians, contractors, and knowledgeable DIYers who need a dependable 12 AWG solid copper conductor for grounding, branch circuits, or long conduit runs in homes, offices, and light industrial projects. Its THHN/THWN rating and robust jacket make it useful where runs may be exposed to heat or occasional moisture and when a continuous solid conductor is preferred for minimal voltage drop.

People who should look elsewhere include those needing stranded conductors for high-flexibility applications or smaller hobby projects where lighter, unjacketed cable is acceptable. Also, this single-conductor product is best paired with proper conduit or assembly rather than used alone where multi-conductor cables are required.

Pros & Cons

Pros

• Solid copper core offers low voltage drop and reliable grounding characteristics for long installation runs.
• PVC and nylon grey jacket is UV tolerant for indoor and outdoor rated installations and resists heat and moisture.
• UL listed and CSA certified, supporting safe, code-conscious electrical work.
• Proudly made in the United States, indicating consistent manufacturing standards.

Cons

• As a solid conductor, it is less flexible than stranded wire and can be harder to route in tight bends or high-flex situations.

Specifications

Length	100 ft (30 m)
Conductor	Solid Copper (SC)
Gauge	12 AWG
Insulation	THHN / THWN PVC + Nylon jacket, grey
Voltage & Temperature	600 V, 90 C (194 F)
Certifications	UL listed, CSA certified, RoHS compliant
Applications	Building wire, grounding, conduit, feeders, residential/commercial/industrial

Our Verdict

The 100 ft 12 AWG Solid Copper THHN/THWN Wire is a practical choice for installers who need a reliable, code-ready conductor for grounding and branch circuits. With solid copper construction, a durable PVC and nylon jacket, and recognized safety listings, it delivers good value for most residential and light commercial projects, though users requiring maximum flexibility should consider stranded alternatives.

Frequently Asked Questions

Is this wire suitable for outdoor use?
Yes, the THHN/THWN jacket is rated for indoor and outdoor use and is resistant to heat and moisture when installed per code.

Can this be used for grounding?
Yes, the solid copper conductor is appropriate for grounding applications where 12 AWG is specified by the installation requirements.

Is this wire code compliant?
The product is UL listed and CSA certified, which supports code-compliant installations when used according to local electrical codes.