{"product_id":"syston-18-3-thermostat-doorbell-hvac-control-cable-solid-copper","title":"Syston 18\/3 Thermostat Doorbell HVAC Control Cable - Solid Copper","description":"\u003cp\u003eIn this review of the Syston 18\/3 thermostat cable, the bottom line is straightforward: this is a reliable, fully copper 18 AWG cable built for technicians and DIYers who need a durable wire for thermostats, doorbells and low-voltage control systems. The single biggest reason to buy is its solid pure copper conductors combined with a 300V CL3 rating and sunlight-resistant jacket, which together deliver dependable conductivity and safety for both indoor and outdoor routing.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid Pure Copper Conductors:\u003c\/strong\u003e Ensures maximal conductivity and lower resistance so thermostats and doorbell transformers run without signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300V CL3 Rating:\u003c\/strong\u003e The 300V power-limited rating provides superior insulation and compliance with Class 3 standards for safe low-voltage use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiser-Rated Jacket (CMR \/ FT4):\u003c\/strong\u003e Riser-rated construction helps meet building requirements for vertical runs between floors in many installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunlight Resistant Jacket:\u003c\/strong\u003e UV resistance allows for outdoor exposure where needed and helps prevent premature jacket degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation-Friendly Design:\u003c\/strong\u003e A round slick jacket with smooth edges and a rip cord makes pulling through conduit and trimming the jacket faster and cleaner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Low-Voltage Use:\u003c\/strong\u003e Sized for thermostat controls, HVAC equipment, doorbells, alarms and intercoms, making it a general-purpose control cable.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Syston 18\/3 cable is aimed at HVAC technicians, electricians, and homeowners installing or replacing thermostat and doorbell wiring who want a full-copper conductor for reliable performance. It is particularly useful for smart thermostat installs and when running cable outdoors to a doorbell transformer because of its sunlight-resistant jacket and 300V rating.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include installers needing multi-conductor stranded cable for frequent flexing or where smaller gauge stranded wire is required by a specialty device. Also, if you need a bundled cable with a communications shield or extra pairs, choose a cable specified for those functions instead.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFull solid copper conductors offer consistent conductivity and durability compared with copper-clad alternatives.\u003c\/li\u003e\n\u003cli\u003e300V CL3 and riser-rated jacket provide a high safety margin and meet common building use cases.\u003c\/li\u003e\n\u003cli\u003eSunlight-resistant and RoHS compliant for reliable outdoor and environmentally safe installations.\u003c\/li\u003e\n\u003cli\u003eEasy-to-pull slick jacket and rip cord speed up installation in conduit and tight runs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers note mixed impressions about thickness; it is solid 18 AWG so it may feel thicker than low-cost thin alternatives or thinner than heavier specialty cables.\u003c\/li\u003e\n\u003cli\u003eNot intended for applications that require shielded or stranded conductors for constant flexing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003e100% solid copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGauge\u003c\/td\u003e\n\u003ctd\u003e18 AWG, 3 conductors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e300V (CL3 power-limited)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJacket Rating\u003c\/td\u003e\n\u003ctd\u003eCMR riser-rated \/ FT4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSunlight Resistance\u003c\/td\u003e\n\u003ctd\u003eUL 1581 sunlight resistant for outdoor use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eRoHS compliant, UL\/ETL listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Syston 18\/3 thermostat cable is a practical, value-oriented choice for anyone wiring thermostats, doorbells or other low-voltage control systems who needs solid copper conductors and a rugged, sunlight-resistant jacket. It balances safety ratings, ease of installation and durability, making it a smart pick for most residential and light commercial HVAC and security wiring tasks.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this cable be used outdoors?\u003c\/strong\u003e\u003cbr\u003eYes, the jacket is sunlight resistant and suitable for outdoor exposure in low-voltage applications when routed according to local code.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this cable suitable for smart thermostats?\u003c\/strong\u003e\u003cbr\u003eYes, the solid copper 18 AWG conductors and 300V CL3 rating provide reliable connectivity for smart thermostats and associated transformers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it include a rip cord for easy jacket removal?\u003c\/strong\u003e\u003cbr\u003eYes, the installation-friendly jacket includes a rip cord and smooth edges to make stripping and pulling easier.\u003c\/p\u003e","brand":"Syston Cable Technology","offers":[{"title":"Default Title","offer_id":48627346702555,"sku":"B0BNLYXG3N","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51uaJRJsBfL._SL1500_29490f81-8953-4713-8819-b2c84855e1d4.jpg?v=1778524069","url":"https:\/\/gearmusthave.com\/products\/syston-18-3-thermostat-doorbell-hvac-control-cable-solid-copper","provider":"GearMustHave","version":"1.0","type":"link"}