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.