What Is NEC 725.154?

NEC 725.154 is the section of the National Electrical Code (NEC) that lists the approved cable types and wiring methods for Class 2, Class 3, and PLTC (Power-Limited Tray Cable) circuits. It uses NEC Table 725.154(A) to match cable listings (e.g., CL2, CL3, PLTC) to permitted installation environments, including plenum, riser, and general-purpose areas.

Scope and Purpose

The section ensures that cables used for power-limited control and signaling circuits meet fire safety, mechanical protection, and code compliance requirements. It applies to a range of systems, including industrial control, security, HVAC, and building automation.

Key Requirements

• Select cable type from NEC Table 725.154(A) based on location and rating.
• Use plenum-, riser-, or general-purpose-rated cables where specified.
• Follow substitution rules allowing higher-rated cables to replace lower-rated ones.
• Install unlisted cable in conduit only if permitted by code.

Conclusion

NEC 725.154 serves as a quick reference for choosing compliant cables for Class 2, Class 3, and PLTC installations, helping ensure safe and reliable wiring in both commercial and industrial environments.