Choosing the right 18/3 plenum cable is essential for reliable, safe, and compliant low-voltage wiring in security, alarm, and control systems. This guide reviews top 18/3 shielded plenum cables, highlighting conductor composition, flame retardancy, and durability to help you select the best option for walls, ceilings, and plenums.
| Product | Conductor | Jacket Type | Length | Rating |
|---|---|---|---|---|
| MOOKEERF Shielded 18/3 Plenum Cable (50 ft) | 18 AWG Stranded Copper | White CMP CL3P | 50 ft | PLENUM-RATED |
| MOOKEERF Shielded 18/3 Plenum Cable (50 ft) | 18 AWG Stranded Copper | White CMP CL3P | 50 ft | PLENUM-RATED |
| MOOKEERF Shielded 18/3 Plenum Cable (200 ft) | 18 AWG Stranded Copper | White CMP CL3P | 200 ft | PLENUM-RATED |
| Voltive 18/3 Plenum Cable (500 ft) | 18 AWG Stranded Copper | White CL3P | 500 ft | UL Listed |
| Custom Cable 18/3 Shielded Plenum, 1000 ft | 18 AWG Stranded Copper | White PLENUM Jacket | 1000 ft | UL Listed |
This article highlights five compatible options, focusing on shielded, plenum-rated cables suitable for security, alarm, access control, and sound systems. Each product section includes a concise review, key features, and a direct Amazon link for quick reference.
MOOKEERF 50ft Shielded 18/3 Plenum Cable
Product includes a 50-foot length of 18 AWG, 3-conductor shielded plenum cable with a CMP/CL3P flame-retardant jacket. The conductor is stranded pure copper, delivering higher conductivity, lower resistance, and enhanced resistance to corrosion compared with copper-clad aluminum. This helps ensure reliable performance for fire alarm and security systems. The plenum-rated jacket provides improved safety attributes suitable for in-wall and in-duct installations. Rated voltage is 300V, with a working temperature range from -10℃ to 90℃, enabling use in a variety of environments.
MOOKEERF 50ft Shielded 18/3 Plenum Cable (50 ft, Variant)
This variant mirrors the 50-foot option with 18 AWG, 3-conductor shielded construction and a CMP CL3P/FPLP plenum-rated jacket. The wire features stranded copper conductors for superior conductivity and durability, ensuring stable operation of low-voltage systems. The flame-retardant jacket is designed to minimize smoke and ignition risk in plenum spaces, supporting compliance with safety standards for building installations. Suitable for security alarms, access control, and sound wiring where plenum-rated cabling is required.
MOOKEERF 200ft Shielded 18/3 Plenum Cable
This 200-foot version extends the same core attributes: 18 AWG, 3-conductor shielded cable with pure copper stranded conductors for enhanced conductivity and reliability. The CMP CL3P/FPLP flame-retardant jacket is designed for plenums and wall/ceiling runs, meeting safety requirements for building installations. Rated voltage remains 300V, with a similar operating temperature range (-10℃ to 90℃). It is well-suited for longer runs in commercial or residential security, alarm, and access control systems where shielded performance is beneficial to minimize interference.
Voltive 500ft Plenum 18/3 Cable
Voltive’s long-length option offers 18 AWG, 3-conductor shielded cable suitable for extensive installations. It uses oxygen-free copper for reduced signal loss and increased durability. The jacket is CL3P-rated, reinforcing its suitability for plenum spaces and other protected routes. UL-listed status adds a level of compliance assurance for both residential and commercial wiring projects. This option is ideal for larger facilities requiring bulk cabling for security, alarm, and control systems.
Custom Cable 18/3 Shielded Plenum 1000 ft
This USA-made option provides a full 1000-foot reel of 18 AWG, 3-conductor shielded copper cable with a shielded drain wire and a plenum-rated jacket. The CL3P outer jacket supports safe installation in walls, ceilings, and plenums, while the shielded design reduces electrical noise—beneficial for alarm, access control, and speaker applications. The product is UL-listed, ensuring adherence to relevant safety and performance standards for large-scale projects and ongoing maintenance runs.
Buying Guide: Key Purchase Considerations
Conductor material: Pure copper conductors offer the best conductivity and resilience against corrosion compared with copper-clad aluminum. This helps maintain signal quality in low-voltage systems such as security and alarm wiring.
Shielding and noise reduction: Shielded cables minimize interference from nearby power lines and other equipment, which is important for reliable communication between sensors, cameras, and control panels.
Plenum-rating and safety: A CMP/CL3P (plenum-rated) jacket resists ignition and reduces toxic smoke in air-handling spaces. This is crucial for code compliance in commercial buildings and high-occupancy areas.
Jacket material and flexibility: A soft, pliable jacket improves ease of installation in walls, ceilings, and conduit runs, while maintaining durability in long-term use.
Length and scalability: For projects with long runs, bulk cable options (such as 200 ft, 500 ft, or 1000 ft) reduce the need for splices and ensure consistent performance across stretches of installation.
Compliance and listings: UL-listed and CL3P-rated products provide assurance that cables meet established safety and performance standards for low-voltage systems.