Southwire 18-4CS 18 Awg 4 Conductor Thermostat Wire 250 Ft

Product Description

The SOUTHWIRE 18-4CS is a 4-conductor, 18 AWG thermostat and low-voltage control wire packaged in a 250-foot speedbag coil for easy jobsite dispensing. This wire is designed for use in low-voltage control circuits where multiple signal conductors are required in a single jacket. It is a standard choice for HVAC thermostat wiring, zone control systems, and similar low-voltage applications. Licensed HVAC technicians and electricians install this type of wire during equipment commissioning, thermostat replacements, and zone controller upgrades in both residential and light commercial settings.

This 4-conductor control wire is well suited for systems that require multiple low-voltage signal runs in one cable run, such as conventional thermostat wiring with separate conductors for cooling, heating, fan, and common. The speedbag packaging keeps the coil contained and reduces tangling during installation, making it practical for attic runs, wall pulls, and conduit work. It is commonly used where a single multi-conductor cable replaces multiple individual wires.

Key Features

• 4 conductors in a single jacket simplifies multi-signal low-voltage wiring runs
• 18 AWG conductor gauge meets standard requirements for thermostat and control circuit wiring
• 250-foot speedbag coil format reduces tangling and improves jobsite handling
• Designed for low-voltage control circuit applications in HVAC and zone control systems

Compatibility

Designed as a standard low-voltage thermostat and control wire replacement suitable for conventional HVAC thermostat wiring and zone control applications requiring 4-conductor, 18 AWG cable.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician in accordance with applicable NEC requirements for low-voltage wiring. Power down the HVAC system and thermostat circuit at the breaker before making any wire connections. Avoid routing low-voltage control wire in the same conduit or raceway as line-voltage conductors unless the wire is rated for that application. Verify local code requirements before running wire through walls, ceilings, or unconditioned spaces.

Technical Specifications

• Conductor Gauge: 18 AWG
• Number of Conductors: 4
• Cable Length: 250 feet
• Application: Low-voltage thermostat and control circuits
• Packaging: Speedbag coil

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 18-4CS