18 Gauge 8 Conductor Shielded Plenum Wire 200FT - Reliable Low Voltage

In this review of the 18 Gauge 8 Conductor Shielded Plenum Wire 200FT, the bottom line is simple: this cable is designed for installers and contractors who need a flexible, plenum-rated multi-conductor cable for low voltage systems. The reviewer found it best for fire alarm, security, intercom and access control work because of the stranded pure copper conductors and CMP/CL3P plenum jacket that balance conductivity and safety in air-handling spaces.

Key Features

• 200 ft length: A full 200 ft spool reduces joins and keeps runs tidy on medium-sized installations without frequent splicing.
• 8 conductors: Eight separate conductors support multi-zone fire alarm, intercom or access control runs from a single cable, simplifying wiring paths.
• Stranded pure copper: Stranded construction improves flexibility for routing through tight corners and offers lower resistance than CCA alternatives.
• Shielded: Integrated shielding helps reduce interference in sensitive low voltage communications and audio lines.
• CMP plenum-rated jacket: The flame-retardant CL3P/FPLP jacket is suitable for plenum spaces, meeting stricter fire performance needs in buildings.
• Wide temperature range: Rated to operate from -10C/14F up to 90C/194F, it withstands typical environmental conditions for indoor wiring.

Who It's For

This cable suits electrical contractors, alarm installers and facility maintenance teams who regularly wire fire alarms, security systems, intercoms and public address runs in commercial or multi-family buildings, especially where plenum-rated cable is required. Its flexibility and shielding make it practical for retrofit work where routing through conduits and tight spaces is common.

It is less appropriate for high-voltage power delivery, outdoor burial, or applications needing individual jacketed pairs with color-coded outer jackets for easy long-term identification; specialists needing those features should choose a different cable type.

Pros & Cons

Pros

• Stranded pure copper conductors deliver better conductivity and corrosion resistance versus CCA, improving reliability for alarm circuits.
• The CMP/CL3P plenum jacket provides enhanced fire performance where building codes require plenum-rated wiring.
• Shielding reduces electromagnetic interference for cleaner signal and audio paths in communication runs.
• 200 ft length and eight conductors reduce the need for multiple runs and simplify multi-zone installations.

Cons

• The cable is intended for low voltage use only and is not suitable for mains power or direct burial applications.
• Coloring or pair-identification details are limited in the description, so installers who require highly visible pair marking may need to plan labeling.

Specifications

Length	200 ft
Gauge	18 AWG
Conductors	8 conductor, stranded pure copper
Voltage Rating	300 V
Temperature Range	-10C/14F to 90C/194F
Shielding	Shielded
Jacket Rating	CMP / CL3P / FPLP (Plenum-rated)

Our Verdict

The 18 AWG 8 conductor shielded plenum cable is a practical, cost-effective choice for low voltage installers who need a flexible, interference-resistant cable that meets plenum fire-safety standards. Its stranded pure copper conductors and shielding make it a reliable option for alarm, intercom and access control runs, offering good value where plenum certification matters.

Frequently Asked Questions

Is this cable suitable for plenum spaces?
Yes. The cable carries a CMP/CL3P/FPLP plenum-rated jacket intended for use in air-handling spaces.

Can this wire be used for power circuits?
No. This product is designed for low voltage systems and is rated 300 V; it is not intended for main power distribution.

Does the cable include shielding for noise reduction?
Yes. The cable is shielded to help reduce electromagnetic interference for audio and communication lines.