Southwire 553080407 18/8 Thermostat Cable 250 Ft Non-plenum CL2

Product Description

The SOUTHWIRE 553080407 is an 18 AWG, 8-conductor solid thermostat cable rated CL2 for class 2 power-limited circuit applications. Supplied on a 250-foot spool in brown jacket, this non-plenum cable is built for low-voltage thermostat control wiring in residential and light commercial HVAC systems. The solid conductor construction supports reliable, low-resistance connections at standard thermostat terminals and control boards. HVAC technicians and electricians install this cable when running new thermostat circuits or replacing damaged wiring between a furnace, air handler, or heat pump and its wall-mounted thermostat.

This cable is suited for residential and light commercial HVAC control wiring where a non-plenum, in-wall or conduit installation is appropriate. The 8-conductor count accommodates multi-stage systems, heat pump applications with auxiliary and emergency heat circuits, and zoning configurations that require additional control wires. The 250-foot spool length covers most single-system residential runs and many light commercial jobs without splicing. It is not rated for use in air-handling spaces or plenum return air plenums.

Key Features

• 18 AWG solid conductors for dependable low-voltage thermostat control circuits
• 8 conductors support multi-stage, heat pump, and zoning control wiring
• CL2 class 2 power-limited circuit rating per NEC Article 725
• Non-plenum jacket suitable for in-wall, conduit, and open-air installations outside air-handling spaces
• Brown jacket for field identification and color-coding of multiple thermostat runs
• 250-foot spool reduces waste and simplifies inventory for service vehicles and job sites

Compatibility

Designed as a standard CL2-rated, 18 AWG 8-conductor thermostat cable for use with conventional and communicating low-voltage HVAC control systems in non-plenum residential and light commercial installations.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician in accordance with NEC Article 725 governing class 2 power-limited circuits. De-energize all equipment at the disconnect or breaker before making any thermostat wiring connections. Route cable away from high-voltage conductors and protect runs through framing or conduit as required by local code. This cable is not approved for installation in plenum or other environmental air spaces.