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Riser (CMR) Security Alarm Cable - 18/4 AWG, CL3R, Stranded (7 Strand), Unshielded, 1000ft, Gray

SKU: ASC-2928-184
RoHS Compliant ETL Verified logo


18/4 CMR Unshielded Alarm Cable for Residential & Commercial Security Systems

Product Highlights

The Riser (CMR) Security Alarm Cable comprises 18/4 AWG Bare Copper 7 Strand Conductors, unshielded with a PVC jacket, suitable for Security Systems, Intercom Systems, Sound/Audio Systems, and Power-Limited Controls. ETL listed and RoHS compliant, it's available in 1000' increments.

Our Bulk Security Alarm Cables, also known as alarm wire, are intricately designed to meet the demands of alarm system installations. Offering a wide array of high-quality cables with riser and plenum rated jackets, ensure compliance with building code requirements prior to purchase. Additionally, the cables feature print legends for easy identification, streamlining installation for various applications.

18/4 CMR Unshielded Alarm Cable for Residential & Commercial Security Systems

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Security Alarm Cable - Riser (CMR) - 22/4 CL2R, Solid BC, Unshielded,


A broad range of applications exist for bulk plenum security alarm cabling. It is widely used with security systems, intercom systems, sound/audio systems, and power-limited controls in commercial settings such as schools, universities, hospitals, airports, government buildings, train and transportation centers, stadiums, and arenas. Since this security cable has multiple conductors under one jacket, the preparation, set up, and termination time is shorter.



  • 18 AWG 4 Conductors
  • CL3R, Riser Rated
  • 7 Stranded Bare Copper Conductors
  • PVC Insulation
  • Unshielded
  • Gray PVC Jacket
  • Sequential Footage Marking
  • CL3R/FPLR Rated
  • ETL Listed
  • RoHS Compliant
  • NEC Articles
    • 22-16 AWG: FPLR/760, CMR/800, CL3R, CL2R/725
    • 14-12 AWG: FPLR, CL3R
Conductor Jacket Color
  1. Black
  2. Red
  3. White
  4. Green

Residential or Commercial Applications:

  • Security Systems
  • Intercom Systems
  • Sound/Audio Systems
  • Power-Limited Controls



Physical Construction

Inner Conductor Stranded Bare Copper
Conductor Size 18 AWG
Insulation PVC
Nominal OD 4.78mm
Outer Jacket Diameter .38mm
Jacket PVC
Jacket Color Gray
Number of Strands 7
Conductor Insulation 1.2mm PVC

Electrical Characteristics

Temperature 75°C
Voltage Rating 300V

Additional Information

Standards ETL | RoHS | CMR | CL3R
Applications Security Systems | Intercom Systems Sound | Audio Systems | Power-Limited Controls
Jacket Printing 18 AWG 4C UNSHIELDED TYPE CL3R/FPLR c(ETL)us TYPE CMR 3054355
Important Notes The information contained in this document is proprietary to CRN Solutions and may not be disclosed or transmitted to any other parties without the express written permission of CRN Solutions. This information is provided for the purposes of quotation only.

Additional Information

How to Select CM, CMR and CMP Cable?

CMR: The 'R' in CMR is for 'Riser'. Riser type cables are engineered to prevent the spread of fire from floor to floor and are suitable for vertical shaft applications.

CMP: The 'P' in CMP is for Plenum. Cables meeting type CMP requirements are suitable for installation in ducts and plenums without the use of conduit. These cables are designed for fire resistance and low-smoke and toxin producing characteristics.

CMX: The 'X' in CMX is for Outside Plant. Cables meeting type CMX requirements are suitable for installation in outdoor applications where exposed to the elements.

CM/CMH/CMG: CM is used for general building wiring such as residential house. CM cables are used in areas other than plenums and risers.

Where to use Plenum Security Alarm Cable


Why Plenum?

A plenum space is the open area above the drop ceiling or below the floor that is used for air circulation in buildings. This could be a problem if there is ever a fire. Using non-plenum cables in a plenum space can spread fire and toxic smoke throughout a building. Plenum cable uses a flame-retardant jacket that is made of special plastics to prevent the release of harmful smoke. Plenum cable is mostly used in commercial applications such as schools and hospital buildings that house a large population of people. It also is required in most multi-floor business buildings with large plenum space areas.

What's in the Box

What's in the Box

  • Security Alarm Cable - Riser (CMR) - 18/4 AWG, CL3R, Stranded (7 Strand), Unshielded, Gray
  • 1000FT