Sigma Wire & Cable | Bulk, Thermostat 18/3 CMR; 18AWG, 3C, Unshielded, 500ft Reel (Brown)
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SKU: 660-226
In stock
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The Sigma Wire Thermostat wire is a high-quality 18 gauge 3 conductor solid copper CMR (communications, multimedia, and riser) wire that is specifically designed for your heating and HVAC needs. The wire's solid copper construction ensures excellent conductivity and durability, while the CMR rating ensures that it is suitable for use in residential and commercial installations.
This thermostat wire is perfect for connecting thermostats to your heating and cooling systems, as well as for use in other HVAC applications. It is UL listed and meets all relevant safety standards, so you can trust that it will provide reliable performance for years to come.
The Sigma Wire Thermostat wire comes in a convenient spool, making it easy to cut and install as needed. It is also coated in a durable and flexible insulation, which helps to protect it from damage and makes it easy to route through walls and ceilings.
Rated 150-Volt
CMR Rated
Sunlight resistant (-20-Degree C to 60-Degree C)
18 gauge bare copper 2 conductors
Length - 500FT
Green compliant RoHS
low voltage
HVAC
alarm systems
Why Pros Buy Direct from Conversions Tech
Engineered in the USA. Our U.S.-based engineering team designs and specifies our core product lines, and every product we carry — designed in-house or built to our exact specifications by certified partner factories — is quality-verified before it ships. UL/CSA listed where required, NEC compliant.
Cross-reference savings. Direct equivalents to Burndy, Hubbell, and other OEM part numbers at up to 30% less — same specs, same certifications, without the big-brand markup.
Real technical support. Need a torque spec, die reference, or an OEM quote? You’ll speak directly with the Conversions Tech engineering desk — not a script reader — for instant answers, custom kitting, and private-label options.
Fast US fulfillment. Orders in by 2PM ET ship same day from our US warehouse, nationwide ground and expedited.
