Southwire 18-6 Thermostat Wire 18 Awg 6-conductor 250 Ft

Product Description

The SOUTHWIRE 18-6 is a 250-foot reel of 18-gauge, 6-conductor thermostat wire built for low-voltage HVAC control wiring. Stranded copper conductors provide flexibility and reliable conductivity across the full run. PVC insulation resists abrasion, moisture, and temperature swings, keeping conductors protected in wall cavities, conduit runs, and mechanical spaces. Rated to 150 volts, this cable handles the multiple signal paths required by modern thermostats with multi-stage heating, cooling, and fan control. The smooth outer jacket pulls cleanly through conduit and tight wall spaces, reducing labor time on the run.

This wire is used in residential and light commercial HVAC installations where 6-conductor cable is needed to support advanced thermostat wiring configurations. Common applications include multi-stage gas furnaces paired with central air conditioning, heat pump systems requiring auxiliary and emergency heat circuits, and zoning control panels that demand dedicated conductors for each control function. HVAC technicians and low-voltage electricians specify 18-gauge 6-conductor wire when standard 2-, 4-, or 5-conductor cable does not provide enough conductors for the control scheme.

Key Features

• 18 AWG stranded copper conductors for flexibility and low-resistance signal transfer
• 6-conductor configuration supports complex multi-stage and multi-function HVAC control wiring
• PVC insulation rated to 150 volts with resistance to abrasion and moisture
• Smooth outer jacket eases pulling through conduit runs and wall cavities
• 250-foot reel length suits full residential or small commercial system runs

Compatibility

Designed as a standard 18 AWG 6-conductor thermostat cable for residential and light commercial low-voltage HVAC control systems requiring 6-wire thermostat connections.

Installation Notes

This cable is typically installed by licensed HVAC technicians or low-voltage electricians following applicable local codes and NEC Class 2 low-voltage wiring guidelines. De-energize the HVAC system and thermostat circuit before making any connections. Avoid sharp bends that could damage conductor insulation, and do not exceed the cable voltage rating. Secure runs properly to prevent contact with heat sources or moving mechanical components.

Technical Specifications

• Conductor Gauge: 18 AWG
• Number of Conductors: 6
• Conductor Type: Stranded copper
• Insulation Material: PVC
• Voltage Rating: 150 volts
• Reel Length: 250 feet

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 18-6