Liberty AV 1000' White Commercial Grade General Purpose 14 AWG 4-Conductor Plenum Cable Reel - 14-4C-P-WHT

Product Overview

The Liberty AV 14-4C-P-WHT is a 1000ft reel of 14 AWG 4-conductor plenum-rated cable designed for commercial AV installations requiring CL3P/CMP compliance in air-handling ceiling spaces. With four independently insulated stranded copper conductors under a single plenum-rated PVC jacket, this cable is the standard specification for dual-voice-coil speaker wiring, bi-amplified speaker installations, 4-conductor AV control runs, and multi-channel distributed audio infrastructure in commercial buildings. The white plenum PVC jacket carries NEC CL3P and CEC CMP FT6 ratings, qualifying it for installation in plenum air-handling spaces without conduit under NFPA 90A.

Product Description

The 14-4C-P-WHT is Liberty AV's commercial-grade 4-conductor plenum cable at 14 AWG, built for AV integrators deploying complex speaker infrastructure in commercial spaces with open plenum ceiling environments. Four conductors in a single jacket reduces cable count and conduit fill compared to pulling two separate 2-conductor cables, which is significant in high-density commercial AV installations where plenum ceiling space is shared with HVAC, data, and power infrastructure.

This cable directly addresses several specific commercial AV wiring scenarios: dual-voice-coil (DVC) subwoofer or ceiling speaker installations where two independent voice coils require four conductors to a single enclosure; bi-amplified speaker systems where separate high-frequency and low-frequency amplifier channels drive a single cabinet; and distributed audio zones where a single cable run provides both speaker-level left and right channels to a stereo zone amplifier output. At 14 AWG with stranded annealed bare copper conductors, this cable provides the flexibility for routing through ceiling grid openings and plenum cavities while maintaining the conductor mass needed for commercial amplifier output impedance matching and PoE-adjacent high-current audio applications.

The plenum-rated PVC alloy insulation on each conductor and the plenum PVC jacket meet NFPA 90A smoke density and flame propagation requirements for air-handling spaces. NEC CL3P covers Class 2 and Class 3 remote-control, signaling, and limited-energy power circuits under NEC Article 725 in addition to speaker-level audio under Article 640 — allowing this cable to serve multi-function AV control and audio runs in a single cable pull. The 1000ft reel is the commercial standard for bulk horizontal cable infrastructure, and the white jacket facilitates visual identification in mixed-cable plenum ceiling environments.

Key Features

• 4-Conductor, Single Jacket — Four independently insulated 14 AWG conductors in one cable reduce conduit fill and installation labor compared to two 2-conductor cables when four conductors are needed to a single endpoint.
• CL3P Plenum Rating — NEC CL3P and CEC CMP FT6 rated for air-handling plenum space installation without conduit, satisfying NFPA 90A low-smoke and flame-spread requirements for the most fire-sensitive building spaces.
• 14 AWG Stranded Bare Copper — 14 AWG stranded conductors provide the flexibility for plenum ceiling routing with the conductor mass needed for commercial amplifier output loads, dual-voice-coil wiring, and extended 70V distribution runs.
• Plenum-Rated PVC Alloy Insulation — Each conductor individually insulated with plenum PVC alloy maintains dielectric integrity and flame performance under NEC CMP requirements for air-handling environments.
• Twisted, Unshielded Construction — Twisted construction provides common-mode noise rejection for speaker-level signal distribution in commercial AV environments without the added cost of shielding.
• Dual-Voice-Coil Speaker Compatible — Four conductors to a single location enable wiring of DVC subwoofers and ceiling speakers where each voice coil requires a separate conductor pair from the amplifier.
• Bi-Amp and Stereo Zone Applications — Supports bi-amplified speaker cabinets (separate HF/LF amplifier channels) and stereo distributed audio zones with a single cable pull from the amplifier rack.
• Class 2 and Class 3 Rated — CL3P covers NEC Article 725 Class 2 and Class 3 circuits, enabling multi-purpose use for AV control wiring alongside audio signal distribution in commercial AV infrastructure.
• White Jacket, 1000ft Reel — White plenum jacket facilitates cable identification in mixed-cable ceiling environments; 1000ft reel minimizes splice points and per-foot cost on commercial projects.
• RoHS Compliant — EU RoHS-2 2011/65/EU compliant for commercial and government projects with environmental substance compliance requirements.

Typical Applications

• Boardroom
• Conference Room
• House of Worship
• Government Space
• Commercial Meeting Space
• Multi-Purpose Room
• All-Hands Room
• Training Room
• Auditorium

Technical Specifications

Frequently Asked Questions

What is the primary advantage of 4-conductor cable over two separate 2-conductor cables?

Using one 4-conductor cable instead of two 2-conductor cables reduces conduit fill, simplifies cable management, and lowers installation labor when four conductors are needed to a single endpoint. In plenum ceilings, reducing the number of individual cables also simplifies NEC fill calculations and improves airflow management. For dual-voice-coil speakers and bi-amplified cabinets, the single cable pull from the amplifier rack to the speaker location is the primary practical benefit.

Can this cable be used for dual-voice-coil subwoofers in a commercial AV installation?

Yes. Dual-voice-coil (DVC) subwoofers and ceiling speakers have two independent voice coils, each requiring a positive and negative conductor from the amplifier — four conductors total to a single speaker location. The 14-4C-P-WHT routes all four conductors in a single cable pull, with pairs assigned to each voice coil at termination. Consult the amplifier's wiring diagram for the correct series, parallel, or independent channel DVC wiring configuration for your target impedance.

Is this cable suitable for 70V distributed audio systems?

Yes. The 14 AWG 4-conductor format works with 70V and 100V constant-voltage distributed audio systems. In a 70V distribution application, one pair can carry the 70V signal and return, with the remaining pair used for a second zone, second channel, or control function — reducing total cable count in multi-zone commercial audio infrastructure. Consult your 70V amplifier manufacturer's wiring documentation for recommended cable gauge at your target run length and total wattage load.

What does "plenum-rated PVC alloy" mean for the insulation?

Plenum-rated PVC alloy is a specifically formulated polyvinyl chloride compound that achieves the low-smoke density and limited flame propagation required for cables installed in air-handling plenum spaces under NFPA 90A. Standard PVC (used in riser or general-purpose cables) produces more smoke and has higher flame propagation when burned, which is unacceptable in air-handling spaces where combustion products would be distributed through the building HVAC system. The CL3P and CMP FT6 ratings on this cable confirm it has been tested and certified to the applicable plenum flame and smoke performance standards.

Can I use this cable for AV control wiring alongside speaker-level audio?

Yes. The NEC CL3P rating covers Class 2 and Class 3 remote-control, signaling, and limited-energy power circuits under NEC Article 725, in addition to speaker-level audio under NEC Article 640. This means the cable can serve dual-purpose functions in a commercial AV installation — for example, routing two conductors as speaker signal and two conductors as relay control or DC power for a room device — provided the circuit voltage and current remain within NEC Article 725 Class 2/3 limits. Verify the specific application with your AHJ for code compliance.

How does 14 AWG 4-conductor compare to 16 AWG 4-conductor for commercial speaker wiring?

14 AWG has approximately 40% lower DC resistance per foot than 16 AWG, which matters for longer commercial speaker runs where cable resistance can affect amplifier damping factor and reduce power delivery to the speaker. For most commercial AV installations with run lengths under 100ft, either gauge is acceptable. For runs of 100–200ft or for high-power amplifier outputs driving 4-ohm loads, 14 AWG is the more appropriate specification. The higher cost of 14 AWG cable is generally justified for commercial backbone audio runs where the cable is difficult to replace after installation.

Is this cable approved for in-wall installation in plenum spaces without conduit?

Yes. The NEC CL3P rating qualifies this cable for in-wall and open-air installation in air-handling plenum spaces without conduit, as permitted by NFPA 90A and the National Electrical Code. CL3P is the highest fire rating for Class 3 audio cable and can substitute for CL2P, CL3R, or CM-rated cables anywhere in the building. Always confirm the specific plenum designation of your ceiling space with the building's mechanical drawings and verify with the AHJ that CL3P cable satisfies local code requirements for the installation environment.