Liberty AV 1000' White Tight Tube Plenum 14 AWG 2-Conductor Speaker Cable Reel

Product Overview

The Liberty AV 14-2C-TTP-WHT (also catalogued as 14-2C-P-WHT-1000) is a 1000ft reel of 14 AWG 2-conductor tight tube plenum-rated speaker cable designed for commercial AV audio distribution in air-handling ceiling spaces. Rated NEC CL3P and CEC CMP FT6, this plenum speaker cable satisfies NFPA 90A and National Electrical Code requirements for installations in plenum air-handling spaces without conduit. The tight tube construction with plenum-rated PVC jacket and 41-strand annealed bare copper conductors makes it appropriate for high-wattage commercial audio systems, 70V distributed speaker infrastructure, and class 2/3 low-voltage circuits in commercial buildings where code compliance is non-negotiable.

Product Description

The 14-2C-TTP-WHT is Liberty AV's commercial-grade plenum 2-conductor speaker cable at 14 AWG, engineered for integrators installing distributed audio in open plenum ceiling environments such as corporate offices, conference centers, retail, educational facilities, and houses of worship. The tight tube construction refers to the plenum-rated PVC jacket that fits closely over the insulated conductors with minimal free space, which contributes to the cable's flame and smoke performance in air-handling spaces where combustion gases would be distributed through the HVAC system.

At 14 AWG with 41-strand bare copper conductors, this cable delivers the flexibility needed for routing through ceiling tile grids and open plenum cavities while maintaining low DC resistance for commercial audio amplifier outputs. Stranded construction also improves fatigue resistance in installations where the cable may move slightly during building settling or HVAC airflow. The NEC CL3P rating covers both Class 2 and Class 3 in-wall and in-plenum audio wiring under NEC Article 725 and Article 640, making this a single-cable solution for commercial audio infrastructure. The white jacket provides visual identification against the typical off-white plenum ceiling environment and facilitates cable tracing in complex multi-cable ceilings. This 1000ft reel format is standard for commercial AV bulk cable pulls and reduces labor-intensive mid-run splices on large open-floor-plan audio installations.

Key Features

• CL3P Plenum Rating — NEC CL3P and CEC CMP FT6 rated for installation in air-handling plenum spaces without conduit, meeting NFPA 90A low-smoke and flame-spread requirements.
• Tight Tube Plenum Construction — Close-fitting plenum PVC jacket over insulated conductors minimizes air gaps that could support combustion, meeting the stricter fire performance criteria for air-handling spaces versus riser-rated cable.
• 14 AWG 41-Strand Bare Copper — 41-strand annealed bare copper conductor at 14 AWG provides flexibility for ceiling routing while delivering the low resistance needed for high-wattage commercial amplifier outputs and longer speaker runs.
• Plenum-Rated PVC Insulation — Each conductor is individually insulated with plenum-rated PVC to maintain dielectric integrity in air-handling environments with elevated thermal cycling from HVAC operation.
• Twisted, Unshielded Construction — Twisted pair geometry provides common-mode noise rejection adequate for speaker-level signal distribution in commercial audio applications.
• 70V Distribution Compatible — 14 AWG conductor size is appropriate for 70V and 100V constant-voltage distributed audio systems in commercial spaces with extended run lengths.
• Class 2 and Class 3 Rated — CL3P rating covers both Class 2 and Class 3 low-voltage power and control circuits under NEC Article 725, allowing this cable to serve multiple functions in commercial AV infrastructure.
• White Jacket, 1000ft Reel — White jacket aids identification in mixed-cable plenum installations; 1000ft reel minimizes splice points on large commercial audio pulls.
• RoHS Compliant — Meets EU RoHS-2 2011/65/EU restricted substance requirements for commercial and government project compliance documentation.

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 does "tight tube" mean in the context of plenum cable construction?

Tight tube refers to a jacket construction where the outer PVC jacket fits closely over the insulated conductor bundle with minimal free space between the jacket and the insulation. This construction minimizes air volume inside the cable that could sustain or spread combustion in air-handling plenum spaces. It is distinguished from loose tube constructions used in fiber optic cables where a gel-filled buffer tube provides slack. For plenum speaker cable, tight tube construction contributes to achieving the NFPA 90A smoke density and flame propagation requirements for CL3P/CMP ratings.

Is CL3P the correct rating for speaker cable installed in a plenum ceiling?

Yes. NEC CL3P (Class 3 Plenum) is the appropriate rating for speaker-level audio cable installed in air-handling plenum spaces as defined by NFPA 90A and NEC Article 640/725. CL3P cable can also substitute for CL2P or CL3R cable anywhere in the building. Always verify the specific plenum designation of your ceiling space with the building's mechanical drawings and confirm with the Authority Having Jurisdiction (AHJ) that CL3P cable satisfies local code requirements.

Can I use this cable for 70V distributed speaker systems in commercial spaces?

Yes. The 14 AWG 2-conductor format is well-suited for 70V constant-voltage distributed audio systems in commercial AV installations including conference centers, retail environments, and houses of worship. At 70V distribution voltage, cable resistance losses are proportionally lower per watt than in low-impedance 4–8 ohm systems, but 14 AWG is still the appropriate choice for backbone runs with higher aggregate wattage loads or runs exceeding 100ft to transformer tap points.

How does stranded 14 AWG compare to solid 14 AWG for speaker cable in commercial AV?

Stranded conductors (41 strands in this case) provide greater flexibility and better resistance to repeated flexing compared to solid conductors of the same AWG. For plenum ceiling installations where the cable must be routed around obstacles, through tight ceiling grid openings, and along varying paths, stranded conductors are easier to handle and less likely to break internally if the cable is bent sharply during installation. The electrical difference at audio frequencies is negligible for commercial speaker distribution purposes.

What is the maximum recommended run length for this cable in a commercial speaker system?

Maximum practical run length depends on the speaker impedance, amplifier damping factor requirements, and acceptable insertion loss. For 8-ohm speaker loads, 14 AWG supports runs up to approximately 150–200ft before cable resistance causes audible power loss and reduced damping. For 70V systems, run length is governed by total tap wattage and acceptable voltage drop; 14 AWG supports longer aggregate runs than 16 AWG for the same wattage budget. Use an online wire gauge calculator or consult NFPA 70B / AVIXA installation guidelines for system-specific calculations.

Can this cable be used for DC power or control wiring in commercial AV?

Yes, within NEC Article 725 Class 3 limits. The CL3P rating covers Class 2 and Class 3 remote-control, signaling, and limited-energy power circuits. This allows the cable to serve DC power distribution to AV control interfaces, relay coils, IR emitters, and similar low-voltage control wiring co-located with audio infrastructure in the same plenum ceiling, subject to NEC Article 725 voltage and power limits.

Is this cable suitable for high-wattage commercial amplifier outputs?

Yes. The description of this cable as suitable for "high wattage systems and infrastructure" refers to its 14 AWG conductor size, which handles higher continuous current than thinner 16 AWG or 18 AWG speaker cable. For very high-power commercial installations (amplifiers above 1000W per zone), verify that the conductor ampacity and resistance at the specified run length are within the amplifier's rated output impedance tolerance and do not exceed the cable's listed current rating.