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Southwire 250 ft. 18/7 Solid Copper Thermostat Wire

Southwire 250 ft. 18/7 Solid Copper Thermostat Wire

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

250 feet of 18/7 solid copper wire handles multi-stage HVAC control runs indoors or buried underground.
Southwire MPN 64170444
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 $0.99
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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About Product Overview

This 250-foot spool of Southwire 18/7 thermostat wire gives HVAC installers and DIYers enough length to run multi-stage thermostats, zone control boards, or other low-voltage control wiring without splicing mid-run. Seven solid copper conductors under a thermoplastic jacket handle everything from basic heat/cool systems to setups needing extra wires for humidifiers or dampers. It's rated for direct burial and holds up outdoors as well as indoors, so it works for underground runs to detached units or straightforward indoor wiring.

  • 18-gauge, 7-conductor solid copper wire
  • 250-foot length
  • Direct burial rated, UV and sunlight resistant
  • Flame retardant thermoplastic insulation and jacket
  • UL listed, 150V rating, -20° to 60°C temperature range
  • Made in the USA

The Details Specifications

Brand Southwire
UPC 032886438608
Case Pack Quantity 2 per case
Retail Unit Quantity 250
Dimensions (L × W × H) 7 × 7 × 6
Weight 11 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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