{"product_id":"syston-18-3-thermostat-doorbell-hvac-control-cable-solid-copper-uv","title":"Syston 18\/3 Thermostat Doorbell HVAC Control Cable - Solid Copper, UV","description":"\u003cp\u003eIn this review of the Syston 18\/3 thermostat cable, the bottom line is simple: installers and DIYers who need a reliable, low-voltage run for thermostats, doorbells, or security panels will appreciate its pure copper conductors and outdoor-rated jacket. The reviewer found the wire easy to pull, robust enough for long runs, and versatile for indoor or outdoor use; the combination of a CL3R\/FT4\/CMR riser rating and 300V insulation makes it a practical choice for most heating, ventilation and low-voltage signaling jobs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e18 AWG 3-conductor:\u003c\/strong\u003e Provides a balanced gauge for thermostat and doorbell circuits that supports common low-voltage controls without excessive bulk.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e100% solid copper conductors:\u003c\/strong\u003e Ensures maximum conductivity and long-term reliability compared with copper-clad alternatives, which helps sensitive thermostats and transformers perform consistently.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e300V CL3R\/FT4\/CMR rating:\u003c\/strong\u003e Offers a high safety margin for low-voltage installations and meets Class 3 power-limited standards for signal and control wiring.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSunlight-resistant jacket:\u003c\/strong\u003e UV-resistant outer jacket lets the cable be used in outdoor or exposed runs while meeting UL sunlight resistance requirements.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eInstallation-friendly design:\u003c\/strong\u003e Round slick jacket with a rip cord and smooth edges makes pulling through walls and conduits easier and quicker.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRoHS compliant:\u003c\/strong\u003e Made without restricted hazardous substances, suitable for environmentally conscious projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Syston 18\/3 cable is aimed at residential and light-commercial electricians, HVAC technicians, and homeowners installing smart thermostats, doorbells, intercoms, and alarm systems. Its solid copper conductors and riser rating make it especially useful when runs need to be durable and reliable, such as connecting a thermostat to a boiler or a doorbell transformer to a chime.\u003c\/p\u003e\n\u003cp\u003eCustomers who need multi-conductor large-gauge power wiring, speaker-level audio runs, or heavy-load mains should look elsewhere; this product is designed for low-voltage control and signal use rather than mains power or high-current applications.\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 deliver consistent conductivity and reliable performance for thermostats and security systems.\u003c\/li\u003e\n \u003cli\u003eOutdoor-rated jacket and UV resistance allow for exposed runs and exterior routing when needed.\u003c\/li\u003e\n \u003cli\u003e300V CL3R\/FT4\/CMR rating offers reassuring insulation quality and compliance with power-limited wiring standards.\u003c\/li\u003e\n \u003cli\u003eRounded slick jacket and rip cord reduce installation time and frustration on long pulls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSome users note mixed impressions of thickness; it may feel thicker than economy cable but thinner compared with heavier multi-conductor industrial wire.\u003c\/li\u003e\n \u003cli\u003eNot intended for mains or high-current uses, so it is limited to low-voltage control and signaling only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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 rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eJacket\u003c\/td\u003e\n\u003ctd\u003eUV-resistant, sunlight resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRatings\u003c\/td\u003e\n\u003ctd\u003eCL3R \/ FT4 \/ CMR riser-rated, UL\/ETL listed\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eThermostats, doorbells, alarms, intercoms, low-voltage controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Syston 18\/3 thermostat cable is a solid, no-surprises choice for anyone wiring thermostats, doorbells, or low-voltage control systems who wants the reliability of solid copper and outdoor durability. It is good value for projects that demand tidy pulls, UL-listed insulation, and long-term performance, though it is not a substitute for high-current or mains wiring.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this cable be run outdoors?\u003c\/strong\u003e\u003cbr\u003eYes, the UV-resistant jacket meets UL sunlight resistance requirements and is suitable for exposed outdoor runs when used for low-voltage applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this suitable for smart thermostats and doorbell transformers?\u003c\/strong\u003e\u003cbr\u003eYes, the solid copper conductors and 18 AWG size work well with smart thermostats and common doorbell transformers for reliable signal and power delivery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used for speaker or mains wiring?\u003c\/strong\u003e\u003cbr\u003eNo, this cable is designed for low-voltage control and signal use and should not be used for mains or high-current speaker power runs.\u003c\/p\u003e","brand":"Syston Cable Technology","offers":[{"title":"Default Title","offer_id":48175165636827,"sku":"B0BNLYHG3T","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51uaJRJsBfL._SL1500_106668d6-3d1e-4325-af14-9e3747c18ff6.jpg?v=1769488840","url":"https:\/\/gearmusthave.com\/products\/syston-18-3-thermostat-doorbell-hvac-control-cable-solid-copper-uv","provider":"GearMustHave","version":"1.0","type":"link"}