Thermostat Cable

Our thermostat cable collection is designed for safe and reliable low-voltage power transmission in both residential and commercial settings. Each cable is built with solid bare copper conductors to provide excellent conductivity and long-term performance. The riser-rated (CMR) brown PVC jacket meets safety requirements for vertical installations, and all products are UL listed for assured compliance. These cables are ideal for thermostats, HVAC systems, and other home automation devices that rely on 18 AWG or 20 AWG wiring. With multiple conductor options and fast shipping, these thermostat cables offer a dependable and convenient solution for low-voltage wiring projects.

18/2 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
18/2 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$102.00
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Ships in 1-3 Business Days (Estimated)
TC-18-2-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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18/3 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
18/3 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$148.50
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Ships in 1-3 Business Days (Estimated)
TC-18-3-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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18/4 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
18/4 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$189.00
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Ships in 1-3 Business Days (Estimated)
TC-18-4-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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18/5 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
18/5 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$238.50
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Ships in 1-3 Business Days (Estimated)
TC-18-5-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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18/6 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
18/6 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$291.00
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Ships in 1-3 Business Days (Estimated)
TC-18-6-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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18/8 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 250ft
18/8 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 250ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$189.00
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Ships in 1-3 Business Days (Estimated)
TC-18-8-US-250

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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20/2 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
20/2 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$67.50
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Ships in 1-3 Business Days (Estimated)
TC-20-2-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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20/5 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft
20/5 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 500ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$157.50
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Ships in 1-3 Business Days (Estimated)
TC-20-5-US-500

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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20/8 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 250ft
20/8 Riser Rated (CMR) Thermostat Cable Solid Copper PVC - BROWN - 250ft

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.

$127.50
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Ships in 1-3 Business Days (Estimated)
TC-20-8-US-250

Our thermostat cable is perfect for providing power to your home automation devices such as your thermostats or any other low voltage device that can be powered by a 18AWG wire.  Our thermostat cable is riser rated (CMR), made of pure solid copper, and is UL listed.
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QuickTreX® Heavy Duty Folding Cable Reel Caddy for Deploying Fiber Optic, Ethernet, Coaxial, Electrical, Audio, and other Cable Reels up to 20 Inches in Diameter by 18 Inches Wide up to 90 Lbs
QuickTreX® Heavy Duty Folding Cable Reel Caddy for Deploying Fiber Optic, Ethernet, Coaxial, Electrical, Audio, and other Cable Reels up to 20 Inches in Diameter by 18 Inches Wide up to 90 Lbs

$54.95
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6 Unit(s) available
QT-CC-20-18-90
Within 24 Business Hours

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Built for Your Application

This group of thermostat cables is tailored for low-voltage wiring jobs where safety, performance, and code compliance are essential. Whether you're running power to a smart thermostat, wiring HVAC controls, or connecting automation systems, these cables offer the durability and flexibility needed for clean and secure installations. The riser-rated jacket allows safe use in vertical pathways between floors, making them especially useful for whole-building or multi-zone systems.

Key Features & Benefits:

  • CMR Riser Rated: Approved for in-wall and between-floor installations in residential and commercial structures

  • 100% Solid Copper Conductors: Provides superior conductivity and long-term reliability

  • UL Listed: Certified to meet industry standards for fire safety and performance

  • Durable PVC Jacket: Protects the conductors while remaining flexible enough for easy routing

  • Brown Color Jacket: Industry standard for thermostat cables, making identification simple

  • Fast Turnaround: Most products ship within 24 business hours

  • Multiple Conductor Options: Choose the conductor count that matches your system needs

Available Configurations for These Products

These thermostat cables are stock products and are available in multiple convenient configurations:

  • Conductor Gauge: 18 AWG or 20 AWG solid bare copper

  • Conductor Count Options: 2, 3, 4, 5, 6, and 8 conductor options available

  • Standard Lengths: Most options come in 500 ft or 250 ft spools

  • Jacket Type: Brown PVC, riser-rated (CMR) for vertical and in-wall applications

  • Customization: These are not customizable. For users needing custom lengths, colors, or specifications, we offer custom cable solutions elsewhere on our site.

Common Uses for Thermostat Cable

  • Powering residential or commercial thermostats

  • Connecting HVAC controls and relays

  • Low-voltage wiring for home automation and smart home systems

  • Wiring alarm systems, sensors, and intercoms

  • Zone control in building management systems

FAQ

What does CMR mean in thermostat cable?

CMR stands for “Communications Riser.” A CMR-rated cable is approved for use in vertical riser shafts between building floors and meets strict fire-resistance standards.

Can I use thermostat cable for other applications?

Yes, these cables are often used for security systems, alarm circuits, door sensors, and other low-voltage control applications, in addition to thermostats.

What’s the difference between 18 AWG and 20 AWG?

18 AWG is thicker and better for longer runs or devices that draw more power. 20 AWG is suitable for shorter runs or less demanding applications.

Is this cable plenum-rated?

No, this is a riser-rated (CMR) cable. For use in plenum spaces, a CMP-rated or plenum-rated cable is required.

Are the conductors color-coded?

Yes, the individual conductors are color-coded according to industry standards for easy identification during installation.

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