{"product_id":"18-awg-thermostat-doorbell-hvac-cable-solid-copper-cl3r-300v","title":"18 AWG Thermostat Doorbell HVAC Cable - Solid Copper CL3R 300V","description":"\u003cp\u003eOur review of this 18 AWG thermostat and doorbell cable finds it most useful for homeowners, installers, and DIYers who need a reliable, fully copper low-voltage conductor for thermostats, doorbells and security gear. The single biggest reason to buy is the combination of \u003cstrong\u003esolid pure copper conductors\u003c\/strong\u003e and a \u003cstrong\u003e300V CL3R insulation rating\u003c\/strong\u003e, which together deliver predictable conductivity, durability and a higher safety margin than cheaper tinned or CCA alternatives. Installers will appreciate the easy-pull round jacket and rip cord for faster termination.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Suitable for wiring thermostat controls, HVAC equipment, doorbells, intercoms, alarms and other low-voltage systems, making it a versatile choice for many projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure Copper Conductors:\u003c\/strong\u003e Solid copper cores provide consistent conductivity and long-term reliability compared with aluminum or copper-clad alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300V CL3R Rating:\u003c\/strong\u003e CL3R\/FT4\/CMR riser-rated insulation gives a high safety margin for low-voltage runs and meets Class 3 power-limited standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation-Friendly Jacket:\u003c\/strong\u003e The round, slick outer jacket and smooth edges reduce friction in conduit and bulky runs, while a rip cord helps strip the jacket neatly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunlight Resistant:\u003c\/strong\u003e UV-resistant construction and compliance with UL 1581 sunlight resistance allow for protected outdoor routing when required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS Compliant:\u003c\/strong\u003e Meets RoHS environmental standards, so it avoids restricted hazardous substances during manufacture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis cable is aimed at electricians, HVAC technicians and homeowners installing or replacing thermostat wires, doorbell transformers, smart thermostats and low-voltage signaling equipment who want a fully copper conductor for better performance. It is particularly useful when longer runs or outdoor-exposed sections require a UV-resistant jacket and a riser-rated insulation.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include people who need multi-conductor shielding for audio or data-grade signal runs or very heavy power wiring; for those uses, shielded or larger-gauge specialty cables would be more appropriate. Also, if you require certified wet-location or direct-burial cable, choose a product specifically rated for that environment.\u003c\/p\u003e\n\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 deliver reliable conductivity and are praised by customers for quality and durability.\u003c\/li\u003e\n\u003cli\u003eThe 300V CL3R\/FT4\/CMR riser-rated insulation provides a strong safety margin for low-voltage systems.\u003c\/li\u003e\n\u003cli\u003eInstallation-friendly round jacket and rip cord speed pulls and jacket removal in tight runs.\u003c\/li\u003e\n\u003cli\u003eUV sunlight resistance and RoHS compliance make it suitable for protected outdoor installations and environmentally aware projects.\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 noted mixed impressions of thickness; gauge feel can vary compared with lower-cost alternatives, so expectations should be set for a standard 18 AWG profile.\u003c\/li\u003e\n\u003cli\u003eNot a substitute for shielded cable or conductors rated for direct burial or high-voltage power circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003e100% solid pure copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAWG\u003c\/td\u003e\n\u003ctd\u003e18 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e300V (CL3R)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJacket\u003c\/td\u003e\n\u003ctd\u003eRound UV-resistant outer jacket with rip cord\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFire\/Safety\u003c\/td\u003e\n\u003ctd\u003eFT4 \/ CMR riser-rated, UL\/ETL listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eThermostats, doorbells, alarms, intercoms, HVAC controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eRoHS compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 18 AWG thermostat and doorbell cable is a practical, value-driven choice for anyone wiring HVAC controls, doorbells or low-voltage signaling where solid copper performance and a higher insulation rating matter. It balances ease of installation with durable materials, making it a smart pick for installers and homeowners seeking dependable, long-lasting wiring without overspecifying for heavy industrial needs.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this cable be used outdoors?\u003c\/strong\u003e\u003cbr\u003eYes, the jacket is sunlight resistant and suitable for protected outdoor runs, but avoid direct burial unless a separate burial-rated conduit or cable is used.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable suitable for smart thermostats?\u003c\/strong\u003e\u003cbr\u003eYes, the solid copper conductors and 18 AWG size are appropriate for most smart thermostat and doorbell transformer installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it include a rip cord for stripping?\u003c\/strong\u003e\u003cbr\u003eYes, the jacket includes a rip cord to make jacket removal quicker and cleaner during installation.\u003c\/p\u003e","brand":"Syston Cable Technology","offers":[{"title":"Default Title","offer_id":48199515308251,"sku":"B0BR66GXBR","price":142.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/514Bs82Cp8L._SL1500.jpg?v=1770299598","url":"https:\/\/gearmusthave.com\/products\/18-awg-thermostat-doorbell-hvac-cable-solid-copper-cl3r-300v","provider":"GearMustHave","version":"1.0","type":"link"}