{"product_id":"18-5-250ft-thermostat-wire-cable-solid-copper-made-in-usa","title":"18\/5 250Ft Thermostat Wire Cable - Solid Copper, Made in USA","description":"\u003cp\u003eOur review of the 18\/5 250ft thermostat cable finds it best suited for contractors and serious DIYers who need reliable low-voltage wiring for HVAC and doorbell systems. The single biggest reason to buy is the combination of \u003cstrong\u003e100% solid copper conductors\u003c\/strong\u003e and a US factory origin, which deliver clean signal transmission and peace of mind about material quality. Installers who value predictable conductivity and a clear warranty will appreciate this cable, while those needing heavy-duty abrasion resistance should consider specialty jacketed options.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Manufactured in New York since 1972, the cable carries craftsmanship standards and domestic supply-chain visibility for professionals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh conductivity:\u003c\/strong\u003e Each conductor is premium solid copper for consistent low-voltage signal transfer to thermostats and HVAC controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e The construction resists common installation stresses so connections remain reliable during normal use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple conductors:\u003c\/strong\u003e Five conductors support multi-wire thermostat setups and doorbell or control circuits without splicing extra runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCL2 ETL listed:\u003c\/strong\u003e Rated for low-voltage use in walls and protected spaces, making it appropriate for residential and commercial installs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifetime warranty:\u003c\/strong\u003e Backed by a long-term guarantee that simplifies replacement or support questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis cable is designed for HVAC contractors, electricians, and informed DIY homeowners who need a dependable 18\/5 run for thermostats, zone controls, and doorbells. The solid copper conductors and CL2 listing make it a natural choice for standard in-wall installations and smart thermostat hookups where signal integrity matters.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for environments that demand heavy mechanical protection or frequent outdoor exposure; users needing armored or UV-resistant jacketed cable should look at specialty products instead.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolid copper conductors provide excellent signal transmission and compatibility with modern thermostats.\u003c\/li\u003e\n\u003cli\u003eMade in the USA with a documented manufacturing history, which appeals to buyers who prioritize domestic production.\u003c\/li\u003e\n\u003cli\u003eCL2 ETL listing and a lifetime warranty reduce uncertainty about safety and long-term support.\u003c\/li\u003e\n\u003cli\u003eFive conductors simplify multi-wire installations without running additional cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report the jacket and conductor assembly can feel fragile during rough handling, so careful installation is advised.\u003c\/li\u003e\n\u003cli\u003eNot intended for outdoor direct-burial or areas needing heavy mechanical protection without additional conduit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor type\u003c\/td\u003e\n\u003ctd\u003e100% solid copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGauge and count\u003c\/td\u003e\n\u003ctd\u003e18 AWG, 5 conductors (18\/5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e250 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListings\u003c\/td\u003e\n\u003ctd\u003eCL2 ETL listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eThermostat, doorbell, HVAC low-voltage control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in USA (New York)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLifetime satisfaction warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 18\/5 250ft thermostat cable is a practical, value-oriented choice for contractors and homeowners who need reliable low-voltage wiring with \u003cstrong\u003esolid copper conductors\u003c\/strong\u003e and US manufacturing. It delivers dependable conductivity and a useful CL2 safety rating, though installers should handle the cable with care during rough pulls or where extra mechanical protection is needed.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this cable be used with smart thermostats?\u003c\/strong\u003e\u003cbr\u003eYes; the solid copper conductors and multiple cores support typical smart thermostat connections and power-signal runs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the cable rated for in-wall installation?\u003c\/strong\u003e\u003cbr\u003eYes, it is CL2 ETL listed for low-voltage in-wall use in residential and commercial settings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the warranty cover installation damage?\u003c\/strong\u003e\u003cbr\u003eThe lifetime warranty covers manufacturing defects and satisfaction issues; damage from improper installation is generally not covered, so check warranty terms.\u003c\/p\u003e","brand":"NATIONAL Wire\u0026Cable","offers":[{"title":"Default Title","offer_id":48611869524187,"sku":"B0CSPSB7LZ","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61kI2MLDXML._SL1500.jpg?v=1778426011","url":"https:\/\/gearmusthave.com\/products\/18-5-250ft-thermostat-wire-cable-solid-copper-made-in-usa","provider":"GearMustHave","version":"1.0","type":"link"}