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Southwire 500 ft. 18/3 Solid Copper Thermostat Wire

Southwire 500 ft. 18/3 Solid Copper Thermostat Wire

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Discover the Southwire 500 ft. 18/3 Solid Copper Thermostat Wire for reliable connectivity, durability, and easy installation in any electrical project.
Southwire MPN 64168845
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $0.99, average $0.39
In-Store Exclusive

This one's worth the trip to the store.

Brands like Weber, Milwaukee, Yeti, and DeWalt restrict where their products can be sold online — and for good reason. In-store buyers get authentic products, full manufacturer warranty, and access to pricing that simply isn't allowed to be advertised on the web.

  • Authorized dealer network · Full manufacturer warranty & support
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  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Experience superior performance and reliability with the Southwire 500 ft. 18/3 Solid Copper Thermostat Wire. Designed to meet the demanding needs of modern electrical installations, this high-quality wire is essential for connecting thermostats and other related devices efficiently.

  • Durable Construction: Crafted from solid copper, this thermostat wire ensures excellent conductivity and longevity, making it suitable for both indoor and outdoor applications.
  • Versatile Use: With an 18-gauge design, the Southwire 500 ft. 18/3 Solid Copper Thermostat Wire is perfect for a variety of heating and cooling systems, ensuring optimal performance in any environment.
  • Direct Burial Rated: This wire is suitable for direct burial, allowing you to install it underground with confidence, knowing it can withstand harsh conditions.
  • Flame Retardant Insulation: Featuring thermoplastic insulation, this wire provides an added layer of safety by resisting flames, making it ideal for residential and commercial applications.
  • Easy Installation: The flexible design of the wire allows for easy handling and installation, saving you time and effort on your projects.

Choose the Southwire 500 ft. 18/3 Solid Copper Thermostat Wire for a reliable and efficient solution to your thermostat wiring needs. Order now and ensure your electrical systems perform at their best!

The Details Specifications

Brand Southwire
SKU 30274
UPC 032886438523
Unit 0
Case Pack Quantity 2 per case
Retail Unit Quantity 500
Unit of Measure 500 SO
Dimensions (L × W × H) 7 × 7 × 6
Weight 10 lbs
Cubic Feet 0.1985 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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What we offer
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$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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