Introduction to Ethernet Cable Jacket Ratings

Learn about Ethernet cable jacket ratings (CM, CMR, CMP, CMX) to ensure network performance and safety. This guide covers their uses, fire resistance, and applications. Explore Celertec's high-quality cables for all your installation needs at Celertec.com.

When setting up a network, selecting the right Ethernet cable is critical for performance and safety. One essential aspect to consider is the jacket rating of the Ethernet cable. This rating refers to the material and construction of the cable's outer sheath, which protects the internal wires and ensures the cable can withstand various environmental conditions. At Celertec, we provide a range of Ethernet cables with different jacket ratings to meet your specific needs.

Types of Ethernet Cable Jacket Ratings

Understanding Ethernet cable jacket ratings helps you choose the appropriate cable for your application, whether for home, office, or industrial use. Here are the common types you should know about:

  1. CM (Communications Multipurpose):

    • Usage: General-purpose
    • Fire Resistance: Basic
    • Application: Residential and commercial buildings
    • Smoke and Toxin Emission: Standard
    • Details: CM-rated cables are designed for general use and offer basic protection. They comply with the National Electrical Code (NEC) for general-purpose communications cables, making them suitable for typical in-wall or open-air installations.
  2. CMR (Riser-Rated):

    • Usage: Vertical installations
    • Fire Resistance: Moderate
    • Application: Running between floors through risers or shafts
    • Smoke and Toxin Emission: Standard
    • Details: CMR cables are specifically engineered for vertical runs in building risers and shafts. They feature improved fire resistance, which prevents flames from spreading between floors, thereby ensuring enhanced safety in multi-story buildings.
  3. CMP (Plenum-Rated):

    • Usage: Plenum spaces
    • Fire Resistance: High
    • Application: Above drop ceilings or below raised floors
    • Smoke and Toxin Emission: Minimal smoke and toxic fumes
    • Details: CMP-rated cables are the highest standard for fire resistance. They are suitable for installation in plenum spaces, which are areas used for air circulation in heating and air conditioning systems. These cables are designed to produce minimal smoke and toxic fumes in the event of a fire, meeting strict safety standards for air handling spaces.
  4. CMX (Communications Multipurpose, Limited Use):

    • Usage: Outdoor installations
    • Fire Resistance: Basic
    • Application: Residential and commercial outdoor settings
    • Smoke and Toxin Emission: Standard
    • Details: CMX-rated cables are designed for outdoor use, providing additional durability against environmental elements such as moisture and UV exposure. They are suitable for residential and light commercial installations where outdoor exposure is expected.

Comparative Table

Jacket Rating Usage Fire Resistance Application Smoke and Toxin Emission Details
CM (Communications Multipurpose) General-purpose Basic Residential and commercial buildings Standard CM-rated cables offer basic protection and comply with NEC standards for general-purpose communications cables. Suitable for typical in-wall or open-air installations.
CMR (Riser-Rated) Vertical installations Moderate Running between floors through risers or shafts Standard CMR cables are engineered for vertical runs in building risers and shafts, featuring improved fire resistance to prevent flames from spreading between floors.
CMP (Plenum-Rated) Plenum spaces High Above drop ceilings or below raised floors Minimal smoke and toxic fumes CMP-rated cables are designed for plenum spaces, producing minimal smoke and toxic fumes to meet strict safety standards for air handling spaces.
CMX (Communications Multipurpose, Limited Use) Outdoor installations Basic Residential and commercial outdoor settings Standard CMX-rated cables are designed for outdoor use, providing durability against environmental elements like moisture and UV exposure, suitable for residential and light commercial installations.

Conclusion

Choosing the right Ethernet cable jacket rating is essential for ensuring the safety and performance of your network. At Celertec, we offer a variety of Ethernet cables with CMR, CMP, and CMX ratings to cater to your specific requirements. By understanding these ratings, you can make an informed decision that complies with safety standards and enhances your network's reliability. Visit Celertec.com to explore our range of Ethernet cables and find the perfect fit for your network needs.