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Southwire 50 ft. 18/2 Solid Copper Thermostat Wire

Southwire 50 ft. 18/2 Solid Copper Thermostat Wire

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Enough solid copper 18/2 wire for a full thermostat or HVAC control run, rated for direct burial and outdoor sun exposure.
Southwire MPN 64162122
Sold Locally Only

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

Typical Store Price i
Typical store price: low $12.99, average $14.99
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.

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Why isn't this online? The whole story →

About Product Overview

Southwire's 18/2 thermostat wire runs low-voltage control signals between thermostats, HVAC equipment, doorbells, and similar systems. The 50-foot coil gives you enough length for most residential runs without leftover waste, and with two solid copper conductors, it handles standard control wiring jobs cleanly. Rated for direct burial and UV resistance, it also works for outdoor runs, not just indoor installs behind walls.

  • 18 AWG, 2-conductor solid copper
  • PVC insulation, flame retardant, UL listed
  • 150V rating, 90°C temperature rating
  • Direct burial and sunlight/UV resistant
  • 50 ft coil, made in the USA

The Details Specifications

Brand Southwire
UPC 032886855986
Case Pack Quantity 4 per case
Retail Unit Quantity 1
Dimensions (L × W × H) 4 × 4 × 3
Weight 1 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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