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Southwire 500 ft. 18/2 Solid Copper Thermostat Wire

Southwire 500 ft. 18/2 Solid Copper Thermostat Wire

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

500 feet of solid copper 18/2 wire built for direct burial and wet locations, with UL-listed flame-retardant insulation.
Southwire MPN 64162144
Sold Locally Only

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

In-Store Exclusive

This one's worth the trip to the store.

This Southwire item is one you'll find in stores rather than online — and that's often the better way to buy. In store you get the genuine article, full manufacturer warranty, and real advice from someone who's actually handled it — no counterfeits, no gray-market resellers.

  • Authorized dealer network · Full manufacturer warranty & support
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Why isn't this online? The whole story →

About Product Overview

Running a new thermostat or low-voltage control circuit? This Southwire 18/2 thermostat wire gives you 500 feet of solid copper conductor rated for the job, from HVAC hookups to doorbells and other low-voltage signal work. The thermoplastic insulation is flame retardant and UL listed, and the wire is rated for direct burial and wet locations, so it holds up whether you're running it through a wall cavity or outside to a remote sensor.

  • 18 AWG, 2-conductor solid copper wire, 500 ft. spool
  • Flame-retardant thermoplastic insulation, UL listed
  • Rated for direct burial and wet locations, -20°F to 60°F
  • 150V rating, suitable for thermostat, bell, and speaker circuits

The Details Specifications

Brand Southwire
Model / MPN 64162144
UPC 032886855320
Weight 7 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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