Copper THHN Wire | 8–14 AWG Stranded & Solid | In Stock

Copper THHN Wire — 8 to 14 AWG | Stranded & Solid | In Stock

Photovoltaic Cable LLC supplies stranded and solid copper THHN wire in 8, 10, 12, and 14 AWG — available in Black, Red, White, and Green. THHN (Thermoplastic High Heat-Resistant Nylon-Coated) wire is the standard specification for conduit and raceway installations in residential, commercial, and industrial buildings. All inventory ships same day from our fulfillment center in LaPorte, Texas.

Available products

Technical specifications

Stranded vs solid — which to choose

Stranded copper THHN is more flexible and easier to pull through conduit — the preferred choice for most installations where the wire will be routed through bends or longer runs. Solid copper THHN offers a more rigid conductor that holds its shape, making it the standard for short runs and terminations at breaker panels. Both are suitable for residential and commercial conduit installations per NEC Article 310.

Recommended applications

• Residential and commercial building wiring in conduit
• Raceway and tray installations in industrial facilities
• Panel board and switchboard wiring
• AC wiring in solar installations (inverter to main panel)
• Motor control and machine tool wiring
• Branch circuit wiring in commercial buildings

Shipping & availability

All sizes are in stock and ship same day from our fulfillment center in LaPorte, Texas. Most orders arrive within 1–3 business days. Free shipping on THHN orders over $400 USD — applied automatically at checkout.

Frequently asked questions

Can THHN wire be used for direct burial?
No. THHN wire is rated for conduit and raceway installations only. For direct burial, UF-B cable or UL4703 PV wire (for solar DC applications) is required.

What is the difference between THHN and THWN?
THHN is rated for dry locations at 90°C. THWN-2 is also rated for wet locations at 75°C. Many wires carry a dual THHN/THWN-2 rating, making them suitable for both environments.

Is THHN wire used in solar installations?
THHN is used for AC wiring on the output side of the inverter (inverter to main panel). For DC wiring between solar panels, UL4703 PV wire is required. See our Copper PV Wire collection.

Do you offer volume pricing on THHN wire?
Yes. Contact our sales team at +1 305 842-6291 for project-specific pricing.

Questions? Call +1 305 842-6291 or email sales@photovoltaiccable.com