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What does CL2 mean?

CL2 is a safety rating for electrical cables that indicates the cable meets specific fire safety standards. This designation is particularly important for in-wall installations where fire hazards must be carefully managed. 

What does CL2 Mean?

CL2 (Class 2) is a fire safety classification established by the National Electrical Code (NEC) that certifies cables for in-wall installations. These cables feature a specially designed jacket that:

  • Burns slowly to prevent rapid flame spread
  • Produces minimal smoke when exposed to fire
  • Meets strict standards for electrical safety

The CL2 rating ensures that the cable won't serve as a conduit for fire to travel between rooms or floors through wall cavities - a critical safety consideration in both residential and commercial buildings. 

When Are CL2 Cables Required?

CL2-rated cables are typically required in the following scenarios:

  • In-wall installations of audio, video, or data cables
  • Residential and commercial buildings subject to local fire codes
  • Runs between floors or between rooms where cables pass through wall spaces
  • Any installation where building codes mandate fire-rated cabling

Regulatory Compliance

Building codes in most jurisdictions require adherence to NEC standards for in-wall cable installations. Before beginning any installation project:

  • Consult your local fire department about specific requirements
  • Review municipal building codes that may have additional stipulations
  • Verify with the authority having jurisdiction (AHJ) for your area
  • Consider hiring a licensed electrician for complex installations

Using non-rated cables in spaces in spaces requiring CL2 could result in code violations, failed inspections, and potentially dangerous fire safety conditions. 

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