Honeywell 18/8cl2 Thermostat Wire 250 Ft 18 Awg 8 Conductor CL2

Product Description

The HONEYWELL 18/8cl2 is a 250-foot reel of 18 AWG, 8-conductor solid thermostat wire rated CL2 for low-voltage control wiring in HVAC and related applications. The brown PVC jacket provides durable insulation and sunlight resistance, making this wire suitable for both indoor and exposed routing where UV degradation is a concern. With an outside diameter of 0.204 inches and solid conductor construction, it pulls cleanly through conduit and behind walls without the kinking common in stranded alternatives. Licensed HVAC technicians and electricians reach for this wire when running control circuits between thermostats, air handlers, furnaces, condensing units, and zone controllers.

This thermostat cable is rated for heating and air conditioning equipment wiring, doorbell circuits, and other low-voltage control applications. The CL2 rating designates it for in-wall installation in residential and light commercial environments. The 8-conductor count supports multi-stage and heat pump systems that require additional conductors for auxiliary heat, reversing valve, dehumidification, or communicating thermostat functions. It ships on a reel, making it straightforward to dispense cleanly on the job site without tangling.

Key Features

• 250-foot reel provides enough run length for most residential and small commercial control wiring jobs
• 18 AWG solid conductors for clean termination at thermostat terminals and control boards
• 8 conductors support multi-stage, heat pump, and communicating thermostat wiring configurations
• CL2-rated PVC jacket approved for in-wall low-voltage wiring per NEC Article 725
• Sunlight-resistant jacket suitable for exposed routing in equipment rooms and exterior chases
• Brown jacket with 0.204-inch outside diameter for easy identification and conduit sizing

Compatibility

Designed for low-voltage thermostat control wiring in residential and light commercial HVAC systems, including heating and air conditioning equipment, zone controllers, and doorbell circuits requiring CL2-rated 18 AWG multi-conductor cable.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician in accordance with NEC Article 725 governing Class 2 low-voltage wiring. Power down the HVAC system at both the thermostat and the disconnect before terminating any conductors. Avoid routing low-voltage thermostat wire in the same conduit as line-voltage wiring to prevent interference and code violations. Strip conductors carefully at terminal connections to avoid nicking the solid copper core, which can cause wire breakage during tightening.

Technical Specifications

• Length: 250 feet
• AWG: 18
• Conductors: 8
• Conductor Type: Solid
• Outside Diameter: 0.204 inches
• Jacket Material: PVC
• Jacket Color: Brown
• Rating: CL2
• Application: HVAC, Low Voltage Thermostat Control
• Package Type: Reel

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: 18/8cl2