SOUTHWIRE 555080423 Solid Copper Thermostat Hvac Plenum Wire 250FT 18/8 18AWG 8/C

( Brand: Southwire ), ( Manufacturer Part Number: 555080423 ), ( Part Type: Thermostat Hvac )

Review SOUTHWIRE 250ft 18/8 Solid Copper Thermostat Hvac 18awg 8/c Plenum Wire White Usa

The Southwire 555080423 is a high-performance 250-foot roll of 18/8 solid copper thermostat and HVAC plenum wire. This wire is specifically designed for use in heating, ventilation, and air conditioning (HVAC) systems, where it is routed through the plenum space above the ceiling or below the floor.

The 18-gauge (18AWG) 8-conductor (8-C) wire is composed of 18 strands of solid copper, which allows for excellent electrical conductivity and reliability. Solid copper wire also provides greater resistance to corrosion and oxidation compared to stranded wire.

Each conductor in this wire is individually insulated with a low-smoke, zero halogen (LSZH) thermoplastic jacket. This type of insulation is highly resistant to burning and produces minimal smoke and toxic fumes when heated, making it an ideal choice for use in plenum spaces. The LSZH jacket also offers excellent flexibility, allowing the wire to be easily bent and maneuvered during installation.

The Southwire 555080423 wire is rated for use in thermostat circuits and HVAC applications, and it conforms to the applicable National Electrical Code (NEC) and Underwriters Laboratories (UL) standards. The wire is also RoHS compliant, meaning it contains no restricted hazardous substances.

This wire is suitable for use in both new construction and renovation projects, and it is available in a convenient 250-foot roll. The wire is shipped on a spool, making it easy to unwind and install. With its excellent electrical performance, high-quality insulation, and compliance with industry standards, the Southwire 555080423 250-foot roll of 18/8 solid copper thermostat and HVAC plenum wire is an excellent choice for any HVAC application.

Pros and Cons of Buying Southwire 555080423 250ft 18/8 Solid Copper Thermostat HVAC 18AWG 8/C Plenum Wire

The Southwire 555080423 250ft 18/8 Solid Copper Thermostat HVAC 18AWG 8/C Plenum Wire is a popular choice for HVAC (Heating, Ventilation, and Air Conditioning) installations due to its high-quality solid copper conductors. In this analysis, we'll discuss the advantages and disadvantages of purchasing this wire.

1. High-quality solid copper conductors: Copper is an excellent electrical conductor, and solid copper conductors offer better conductivity than stranded wires. This results in less voltage drop, which is essential for efficient power transmission in HVAC systems.

2. UL listed for plenum installations: The wire is UL (Underwriters Laboratories) listed for plenum installations, making it suitable for use in the air handling spaces of HVAC systems. This listing ensures the wire meets specific safety standards.

3. Flexibility: Despite being solid copper, this wire still offers some flexibility, making it easier to install in complex HVAC systems.

4. Long length: With a length of 250 feet, this wire provides ample length for most residential HVAC installations.

5. 18 AWG (American Wire Gauge) size: This wire size is commonly used in HVAC applications and is suitable for most thermostat wiring needs.

1. Cost: Solid copper wires, especially in long lengths, can be more expensive compared to stranded wires or other materials.

2. Stiffer than stranded wires: Solid copper wires are stiffer than stranded wires, making them more challenging to work with in complex installations.

3. Not suitable for high-flex applications: Due to its solid construction, this wire may not be suitable for applications with frequent bending or flexing, such as in industrial settings or HVAC ductwork with frequent turns.

The Southwire 555080423 250ft 18/8 Solid Copper Thermostat HVAC 18AWG 8/C Plenum Wire is an excellent choice for HVAC installations requiring high-quality, efficient power transmission and UL listed plenum wiring. While it may be more costly and stiffer than other options, its benefits, such as improved conductivity and safety, make it a worthwhile investment for many applications.

If you're looking for a high-quality, reliable, and UL listed plenum wire for your HVAC installation, the Southwire 555080423 250ft 18/8 Solid Copper Thermostat HVAC 18AWG 8/C Plenum Wire is an excellent option to consider. Its solid copper conductors provide improved conductivity and efficiency, ensuring your HVAC system runs smoothly and efficiently. However, keep in mind that its cost, stiffness, and limited flexibility may be drawbacks for some applications. Weigh the pros and cons carefully before making your purchase to ensure this wire is the best fit for your specific needs.

Details:

Strands Solid. Rhos-3 Complies with Latest Directive. UL 13 Power-Limited Circuit Cables. Plenum Rated.

Jacket Color: White. UL 444 CMP/CL2P. ASTM B3 Soft or Annealed Copper Wire.

part #: 555080423 prices

• $124.99-$228.99

specifications thermoditto:

• brand: Southwire
• mpn: 555080423
• part type: Thermostat Hvac

returns thermoditto:

• policy: No Returns

shipping thermoditto:

• type: Fixed
• service: Standard, Expedited
• transit: 3-7 Days
• class: Standard, Expedited
• cost: $0.00

payments thermoditto:

• other
• wallet: Paypal
• credit card: Diners-club

offer thermoditto:

• availability: In Stock
• started: February 4, 2026
• sold: 0
• quantity: 4
• options: Ship-to-home

general thermoditto:

• Heating, Cooling Air > Thermostats > Programmable Thermostats
• condition: New

seller thermoditto:

• rating: 99.7%
• city: Fort Smith, Arkansas
• # reviews: 29518

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