18AWG Thermostat Cable | UL Certified CL2 CMR Low Voltage HVAC Control Wire

Product Overview

Our preminum thermostat cable is engineered for low-voltage HVAC control system, smart thermostat installations and residential&Commercial temperature control wiring, Available in 2/3/4/5/6/7/8 multi-core specifications with standard 18AWG solid copper conductors, this thermostat wire fully adapts to mainstream smart thermostats as well as heat pump and multi-stage HVAC systems, manufactured in compliance with UL.CL2 and CMR industry standards, it delivers stable signal transmission, excellent environmental adaptability and hassle-free DIY or professional installation, solving the most common wiring pain points for global HVAC users and electricians,

Core customer pain points &targeted solutions

Based on global search trends and user feedback from google, ETC we have summarized and solved the most frequent problems encountered in the thermostat cable installation and use:

1.No C wire for smart thermostats

Pain point: most old HVAC systems lack a C(common)wire, causing smart thermostats to fail to power on, frequently shut down or work abnormally, many users struggle with imcompatible wiring and have to purchase additional C wire adapers

Our solution:Our Multi-core (5/6/8 CORE) themostat cable reserves an independent C wire channel, It supports directly C wire power supply for all smart thermostat models, eliminates the need for extra adapters, and perfectly matches the power supply requirements of modern smart temperature control systems,

2.Uncertain wire Gauge&Core Number Selection

Pain point: Users cannot distinguish 18AWG vis 20AWG applicability, and often chooose insufficient cores, reulting in failure to support multi-stage heating/cooling and heat pump system, or inability to reserve space for future system upgrades

Our solution: we Adopt the industry-standard 18Awg thickened solid copper gauge, the most universal spcification for 0-100ft long-distance wiring, multiple core options(2-8 cores)cover basic single-stage systems and advanced multi-stage heat pump systems, The extra reserved core support future HVAC system upgrades without re-wiring

3. Signal Instability & System Malfunctions

Pain Point:Inferior cables have high resistance and poor anti-interference performance, causing thermostat signal delay, fan stuck operation, frequent system cycling, and inaccurate temperature sensing.

Our Solution: pure solid copper conductors ensure ultra-low resistance and stable current transmission. The optimized low-capacitance design effectively reduces signal attenuation and external electromagnetic interference, ensuring real-time and accurate signal transmission for long-distance wiring, and avoiding various HVAC system failures caused by poor wiring.

4. Non-compliant Safety Standards & Environmental Damage

Pain Point:Ordinary cables lack formal certification, fail fire safety tests, are not UV-resistant or moisture-proof, and are prone to aging, cracking and short circuits in complex indoor and outdoor environments, bringing hidden safety hazards.

Our Solution:Fully compliant with UL 13, CL2 and CMR riser-rated safety standards and NEC 725 electrical specifications. The premium PVC/XLPE insulation and outer sheath features flame retardant, moisture-proof, UV-resistant and anti-aging properties, adapting to -20°C to +60°C working environments, meeting residential and commercial building safety codes.

5. Difficult Installation & Wiring Confusion

Pain Point:Unmarked cable colors lead to wrong wiring; hard sheath is difficult to strip, resulting in low DIY installation efficiency and high error rate.

Our Solution:Strict industry standard color-coded conductors (R/W/Y/G/C) correspond to power, heating, cooling, fan and common wire functions one by one, avoiding wiring mistakes. The flexible outer sheath comes with a rip cord for fast and clean stripping, greatly improving DIY and professional installation efficiency.

Premium Product Performance Features

·  Solid Pure Copper Conductor:Adopts high-purity solid copper core with excellent electrical conductivity, low voltage drop and oxidation resistance. It ensures continuous and stable power supply and signal transmission, far superior to stranded copper or aluminum alloy wires, and extends the overall service life of the HVAC system.

· Full Safety Certification Compliance:Passes UL, ETL, CL2, CMR and RoHS certifications, compliant with North American low-voltage electrical codes. It can be legally used in indoor riser pipelines, residential buildings and commercial office spaces with zero safety risks.

· Strong Environmental Adaptability:High-quality flame-retardant PVC insulation layer resists corrosion, moisture, ultraviolet rays and low-temperature aging. It maintains stable performance in high-temperature rooms, humid basements and ventilated pipeline environments, and is not easy to crack or deform.

· Stable Long-Distance Transmission:Optimized low-interference and low-capacitance design supports stable wiring up to 100 feet. No signal delay or power loss occurs in long-distance laying, fully meeting the wiring needs of large houses and commercial spaces.

· Humanized Installation Design:Standard color-coded wires support quick identification of all thermostat wiring functions. The flexible cable body is easy to bend and lay, matching various wall pipe wiring scenarios, suitable for amateur DIY installation and professional engineering construction.

· Wide System Compatibility:Fully compatible with all mainstream smart thermostats (Nest, Honeywell, Ecobee), traditional mechanical thermostats, single/multi-stage heating and cooling systems, heat pump systems and zone control HVAC systems.

Product Specifications

· Wire Gauge:18AWG (industry standard for HVAC thermostat wiring)

· Core Options:2/3/4/5/6/7/8 conductor multi-spec optional

· Conductor Material: solid pure copper

· Insulation & Jacket:Flame-retardant PVC/XLPE

· Rated Voltage:150V low voltage

· Working Temperature:-20°C ~ +60°C

· Safety Rating:CL2, CMR, UL 13 certified, NEC 725 compliant

· Features:Flame retardant, UV resistant, moisture proof, anti-aging, easy to strip