Southwire 25 ft 12/3 THHN Tri-Wire - Durable 12 AWG Copper Wiring

In this review of the Southwire 25 ft. 12/3 Black/White/Green Solid CU THHN Tri-Wire, the bottom line is straightforward: this is a practical, no-nonsense length of 12 AWG copper THHN suitable for small commercial or residential electrical runs. The reviewer found it especially useful when installing devices that require a standard 12/3 cable, and its 600-Volt rating and solid copper conductors make it a reliable choice for outlets, switches and other loads. Ease of pull and overall wire quality are the single biggest reasons many choose this product.

Key Features

• 12 AWG construction: Provides the capacity and durability expected for common outlet and switch circuits in light commercial and residential settings.
• Solid CU conductors: Solid copper wires ensure consistent conductivity and good termination when used with standard connectors.
• 25 ft length: A convenient spool size for short runs that avoids excess waste while covering typical installation distances.
• Black/White/Green color set: Includes clear conductor colors for hot, neutral and ground to simplify identification during installation.
• 600-Volt THHN rating: Rated for higher-voltage environments than basic building wire, providing a margin of safety for many applications.
• Easy to pull: Users report it slides through conduit and raceways with less effort than some alternatives.

Who It's For

This wire is best for electricians, contractors and knowledgeable DIYers who need a short, ready-to-use 12/3 run for outlets, switches, or to feed a small appliance or HVAC component. The 25 ft length fits jobs where a single spool covers the distance without unnecessary excess.

Those who need long continuous runs, multi-conductor cable assemblies other than THHN, or stranded conductors for flexible connections should look elsewhere. Likewise, users without experience terminating THHN should consult an electrician.

Pros & Cons

Pros

• Wire quality is consistently praised, with solid copper conductors that terminate cleanly and reliably.
• Value for money compared with alternatives, offering a useful 25 ft length at a competitive price point.
• Ease of pull through conduit and raceways reduces installation time for short runs.
• Functionality demonstrated in real installs, including work on HVAC and mini split connections.

Cons

• Solid conductors are less flexible than stranded wire, so they are not ideal where high flex or vibration resistance is required.
• 25 ft length may be too short for larger projects that need longer continuous runs.

Specifications

Product	25 ft 12/3 Solid CU THHN Tri-Wire
Gauge	12 AWG
Conductors	Copper (CU) solid
Colors	Black / White / Green
Length	25 ft
Rating	600-Volt THHN
Intended use	Outlets, switches and other loads

Our Verdict

The Southwire 25 ft 12/3 Solid CU THHN Tri-Wire is a sensible purchase for anyone needing a short, dependable 12 AWG run with solid copper conductors and a 600-Volt rating. It offers good value, easy installation for conduit runs, and solid performance for outlets, switches and small appliance or HVAC connections; skip it only if you need stranded conductors or longer lengths.

Frequently Asked Questions

Is this wire suitable for conduit runs?
Yes, reviewers reported it pulls easily through conduit and is commonly used for conduit-fed circuits.

Are the conductors solid or stranded?
The product contains solid copper conductors, not stranded, which affects flexibility but improves termination consistency.

What voltage is this rated for?
This THHN wire is rated for 600-Volt applications.