18/3 Thermostat Doorbell HVAC Wire, True Gauge 18 AWG 3 Conductor Solid Copper Control Cable, ETL Listed CL3R/CMR Riser Rated Flame-Retardant, RoHS, for 0-30V Low Voltage Systems - 30FT
18/3 Thermostat Doorbell HVAC Wire, True Gauge 18 AWG 3 Conductor Solid Copper Control Cable, ETL Listed CL3R/CMR Riser Rated Flame-Retardant, RoHS, for 0-30V Low Voltage Systems - 30FT
Couldn't load pickup availability
- 24/7 Customer Support
- Risk-Free 30-Day Returns
- Fast & Reliable U.S. Shipping
Contact Information
Contact Information
30-Day Hassle-Free Returns
30-Day Hassle-Free Returns
Not satisfied? Return your order within 30 days for a full refund or exchange — simple and easy.
✔ Easy return process
✔ Fast refunds
✔ No hidden conditions
Fast U.S. Shipping
Fast U.S. Shipping
We ship within the United States only — no international delays.
✔ Processing time: 1–2 business days
✔ Delivery time: 3–7 business days
✔ Real-time tracking available
👉 Track your order anytime from the header via Track Order
About This
- ⚡【True Gauge 18 AWG – Approx. 1.02mm / 0.04in Solid Copper】This 18/3 thermostat wire uses true gauge 18 AWG 3-conductor solid copper conductors with an approx. 1.02mm / 0.04in diameter, helping deliver reliable conductivity, reduced voltage drop, and stable signal transmission for low-voltage thermostat and HVAC control wiring.
- 🔥【ETL Listed to UL 13 – CL3R/CMR Riser-Rated Flame-Retardant Jacket】This thermostat wire is ETL Listed to UL 13 standards and built with a CL3R/CMR riser-rated flame-retardant jacket, designed to help limit flame spread in vertical riser spaces, in-wall cable runs, and Class 3 power-limited low-voltage control installations.
- 🏠【Ideal for Thermostat, HVAC, Doorbell and Low-Voltage Control Applications】Designed for thermostat wire replacement and new 0–30V low-voltage control wiring, this 18 AWG thermostat cable is ideal for HVAC systems, furnaces, heating and air conditioning controls, thermostat connections, doorbell wiring, alarm systems, and general multi-conductor low-voltage control applications.
- ☀️【UV-Resistant PVC Jacket & RoHS Compliant Materials】This 18/3 thermostat wire features a durable UV-resistant PVC jacket designed to meet UL 1581 sunlight resistance requirements, helping resist aging, cracking, and sun exposure in indoor and protected outdoor low-voltage control installations. Made with RoHS compliant materials for reliable long-term control wiring.
- 🛠️【Class 3 300V Rated + Bonus Installation Kit】Rated for Class 3 power-limited low-voltage control circuits, this thermostat wire provides a 300V insulation safety margin for control wiring, not high-voltage power use. Includes 1 roll of premium electrical tape and 10 wire nuts designed to meet UL 486C requirements for convenient thermostat and HVAC installation.
Overview
- Color : 18/3 Brown
- Brand : Voltic Stone
- Material : Copper, Polyvinyl Chloride
- Number of Cable Strands : 3
- Number of Items : 1

WE MAKE SMART LIVING SIMPLE.
OUR TEAM HELPS SECURE YOUR HOME.
SmartHomeValueHub helps homeowners create safer, smarter, and more convenient living spaces with trusted smart home solutions built for everyday life.
From smart security cameras and smart locks to video doorbells, thermostats, lighting, and home automation essentials — we focus on products that improve real comfort, safety, and efficiency.
Our goal is simple: better protection, lower energy costs, and smarter daily living for every home.
Why Homeowners Trust SmartHomeValueHub
✔ Easy Setup
✔ Matter Compatible
✔ Smart Security
✔ Energy Saving
50K
HaSMART DEVICES INSTALLEDppy Clients
15+
YEARS OF SMART HOME EXPERTISE
98%
CUSTOMER SATISFACTION RATE
365
RELIABLE SUPPORT YEAR-ROUND
Smarter Security. Lower Bills. Easier Living.
SMART HOME FAQ
Yes — many modern devices support multiple platforms.
Matter-certified devices can work across Alexa, Google Home, and Apple HomeKit at the same time.
Not always.
Smart bulbs, plugs, cameras, and video doorbells are often easy DIY installations, while full security systems may need professional setup.
Many devices still work manually or through local control.
You may lose remote app access, but locks, lights, and thermostats often continue basic functions.
Security depends on the device and setup.
Use strong passwords, trusted brands, firmware updates, and secure Wi-Fi for better protection. Privacy and unauthorized access are common concerns in smart homes.
Most homeowners start with:
Smart Security Cameras
Smart Door Locks
Smart Thermostats
Smart Plugs
Video Doorbells
Yes.
Smart thermostats and smart plugs help reduce wasted energy by automating heating, cooling, and power usage.
It depends on your ecosystem.
Alexa → widest compatibility
Google Home → strong for Android users
Apple HomeKit → best privacy
Home Assistant → advanced control
Smart Home Tips, Trends & Buying Guides