Southwire 552030507 Thermostat Cable 20 Awg 3 Conductor

Product Description

The SOUTHWIRE 552030507 is a 20 AWG, 3-conductor thermostat cable designed for low-voltage control wiring in HVAC systems. The cable features a brown PVC jacket rated for sunlight resistance, making it suitable for both indoor runs and exposed outdoor routing between equipment. At 0.121 inches in overall diameter, it pulls cleanly through conduit or staples directly to framing. This cable is sold in 1-foot cut increments with a 250-foot minimum cut length, drawn from a 2,000-foot coil. HVAC technicians and installers use it for thermostat wiring, zone control, and similar 24-volt signal applications.

This thermostat cable is used in residential and light commercial HVAC installations where a 3-conductor, low-voltage wire run is required. Typical applications include connecting a thermostat to a furnace, air handler, or heat pump control board, as well as zone valve wiring and humidifier control circuits. The sunlight-resistant PVC jacket extends service life on runs that pass through attic spaces, crawlspaces, or short exterior segments between disconnect and equipment.

Key Features

• 20 AWG stranded conductors suited for low-voltage thermostat and control circuits
• 3-conductor configuration covers common heating, cooling, and common wire runs
• Brown PVC jacket provides sunlight resistance for mixed indoor and outdoor routing
• 0.121-inch overall diameter fits standard low-voltage staples and bushings
• Sold in 1-foot increments with a 250-foot minimum cut length from a 2,000-foot coil

Compatibility

Designed as an OEM-style replacement and new-installation thermostat cable for residential and light commercial low-voltage HVAC control wiring applications requiring a 3-conductor, 20 AWG cable.

Installation Notes

Installation is typically performed by licensed HVAC technicians or electricians following NEC low-voltage wiring guidelines. Always de-energize the HVAC system and set the thermostat to the off position before connecting or replacing thermostat cable. Avoid sharp bends that could kink conductors, and use appropriate low-voltage staples or cable guides to secure runs without crushing the jacket. Do not use this cable as a substitute for line-voltage wiring.