Southwire 553020507 18 Awg 2-conductor Thermostat Cable

Product Description

The SOUTHWIRE 553020507 is an 18 AWG, 2-conductor thermostat cable designed for low-voltage control wiring in heating and cooling systems. The cable features a PVC jacket with a 0.132-inch diameter and is rated sunlight resistant, making it suitable for both interior runs and exposed exterior routing. It is sold in 1-foot cut increments with a 250-foot minimum cut length and comes on a 2000-foot total coil. HVAC technicians use this cable to connect thermostats, zone controls, and other low-voltage components to furnaces, air handlers, condensers, and heat pump systems.

This cable is well suited for residential and light commercial HVAC installations where 18 AWG, 2-conductor low-voltage wiring is required. Typical applications include thermostat-to-furnace wiring, transformer secondary circuits, and simple on-off control loops. The sunlight-resistant PVC jacket extends service life in attic spaces, exterior walls, or any run with incidental UV exposure. The brown and white conductor color coding supports straightforward termination during installation.

Key Features

• 18 AWG, 2-conductor construction for standard low-voltage thermostat circuits
• 0.132-inch overall diameter PVC jacket keeps the cable compact for tight routing
• Sunlight-resistant jacket rated for runs with UV exposure
• Brown and white conductor colors for easy field identification
• Sold in 1-foot cut increments starting at a 250-foot minimum, reducing waste on custom-length jobs
• 2000-foot coil length supports large-scale or multi-unit installations

Compatibility

Designed as a standard low-voltage thermostat cable for use in residential and light commercial HVAC control wiring applications requiring 18 AWG 2-conductor cable.

Installation Notes

This cable is typically installed by licensed HVAC technicians working on low-voltage control circuits. Always de-energize the transformer and disconnect low-voltage wiring before making or breaking connections. Route cable away from high-voltage conductors and follow NEC Article 725 requirements for Class 2 low-voltage wiring. Avoid sharp bends that could damage the PVC jacket or deform the conductors.