12 AWG Solid Copper THHN/THWN Wire 100 ft - Durable Yellow Jacket

Our review of this 12 AWG solid copper THHN/THWN wire finds it best suited for installers, electricians, and handy homeowners who need a reliable, long run of building wire with solid grounding capability. The bottom line: this 100 ft roll delivers consistent, industry-standard construction with a tough PVC and nylon jacket rated to 600 volts and 90 C, making it a straightforward choice when flexibility, moisture resistance, and long installation runs matter most.

Key Features

• Solid copper conductor: Provides dependable conductivity and mechanical strength for grounding and feeder circuits in residential and commercial settings.
• THHN/THWN insulation: Dual-rated PVC and nylon jacket gives heat and moisture resistance for indoor and outdoor use, reducing concern about environmental exposure.
• 600 V electrical rating: Rated for standard building circuits up to 600 volts and 20 amp service at 90 C, suitable for many installations.
• Works with conduits and trays: The solid construction feeds easily through conduits and table trays for services, feeders, branch circuits, and equipment wiring.
• Made for varied environments: Built to meet UL and CSA expectations so it can be used across residential, commercial, and industrial installations.

Who It's For

This wire is primarily for licensed electricians, contractors, and skilled DIYers who need a reliable 100 ft length of 12 AWG solid copper for grounding, control circuits, appliances, or equipment feeds. It is especially useful where a yellow jacket is required for identification, or when runs pass through conduit and need the ruggedness of THHN/THWN insulation.

Those who need greater flexibility for frequent bending or push-in terminations might prefer a stranded conductor instead, and buyers who require lengths longer than 100 ft in a single piece should consider buying multiple rolls or a different packaging option.

Pros & Cons

Pros

• High quality solid copper offers excellent conductivity and durability for grounding and branch circuits.
• The THHN/THWN PVC and nylon jacket resists heat, moisture, and common jobsite contaminants.
• Works well with conduits, trays, appliances, and control circuits for versatile use across installations.

Cons

• As a solid conductor, it is stiffer than stranded wire and can be harder to route in tight bends.
• Length is fixed at 100 ft per roll, which may not suit projects needing longer continuous runs without splices.

Specifications

Length	100 ft (30 m)
Conductor	Solid copper
Gauge	12 AWG
Insulation	THHN / THWN PVC with nylon jacket
Voltage rating	600 V
Temperature rating	90 C / 194 F
Certifications	UL Listed, CSA certified, RoHS compliant

Our Verdict

The 12 AWG solid copper THHN/THWN 100 ft roll is a solid value for electricians and homeowners who need durable, code-friendly building wire for grounding and standard circuits. It balances robust insulation, recognized certifications, and practical length, making it a dependable choice when a stiff, long-lasting conductor is preferred over stranded alternatives.

Frequently Asked Questions

Is this wire rated for outdoor use?
Yes. The THHN/THWN PVC and nylon jacket provides moisture and heat resistance suitable for many outdoor and indoor installations when run in conduit as required.

Can it be used for grounding antenna installations?
Yes. Customers report it works well for grounding antennas and similar applications where a solid copper conductor is appropriate.

What ampacity does 12 AWG support?
It is commonly used for 20 amp circuits and the product is specified for 600 V at 90 C, matching typical 12 AWG applications.