Southwire 31155512 18 Awg 4C Plenum Cable 500 Feet

Product Description

The SOUTHWIRE 31155512 is an 18 AWG, 4-conductor unshielded multiconductor cable rated for plenum installations. It carries a CMP/FT6 plenum rating, making it suitable for installation in air-handling spaces where building codes require low-smoke cable. The conductors are stranded bare copper, which provides reliable conductivity and low voltage drop across low-voltage control and signal circuits. The cable ships in a 500-foot coil with countdown length markings printed on the jacket, allowing technicians to track usage and remaining stock without measuring. HVAC controls technicians and low-voltage electricians are the primary installers of this cable type.

This cable is used in commercial and residential HVAC control wiring, building automation, fire alarm signal circuits, and other low-voltage multiconductor applications where plenum-rated cable is required by the International Mechanical Code or local AHJ. The 4-conductor configuration suits common thermostat, zone control, and sensor wiring layouts. The unshielded construction keeps the cable profile compact and flexible for routing through tight plenum spaces and conduit runs.

Key Features

• CMP/FT6 plenum-rated jacket meets code requirements for air-handling plenum spaces
• Stranded bare copper conductors provide flexibility and reliable low-voltage conductivity
• Low-smoke PVC insulation and plenum PVC jacket reduce smoke output in fire conditions
• Durable rip cord simplifies jacket stripping during termination
• Countdown length markings allow accurate tracking of remaining cable on the coil
• Rated for 300 volts and a temperature range of -20 degrees C to 75 degrees C

Compatibility

Designed for use as plenum-rated low-voltage multiconductor cable in HVAC control, building automation, and signal wiring applications where CMP-rated cable is specified.

Installation Notes

Installation should be performed by a licensed low-voltage or journeyman electrician in accordance with NEC Article 800 and applicable local codes. Confirm with the AHJ that CMP rating satisfies the plenum space requirement before pulling cable. De-energize all control circuits before making terminations. Use the built-in rip cord to strip the jacket cleanly and avoid nicking conductor insulation during prep.

Technical Specifications

• Conductor Size: 18 AWG
• Number of Conductors: 4
• Stranding: Stranded
• Shielding: Unshielded
• Voltage Rating: 300 volts
• Temperature Rating: -20 degrees C to 75 degrees C
• Jacket Rating: CMP/FT6 Plenum
• Conductor Material: Bare Copper
• Nominal Total Weight: 29 pounds per 1000 feet
• Cable Length: 500 feet

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 31155512