What type of circuits are addressed in Article 725?

Article 725 of the National Electrical Code (NEC) specifically deals with requirements for remote-control, signaling, and power-limited circuits. This article outlines the safety and installation standards necessary for circuits that are designed to carry low voltage and are often used for control and signaling purposes, such as alarm systems, computer systems, and lighting control systems.

These circuits are significant in that they typically operate at a lower voltage, which reduces the risk of shock and minimizes the complexity of installation compared to standard power circuits. The standards described in Article 725 help ensure that such circuits are installed safely and function as intended without posing hazards.

The other options refer to different types of electrical systems or specific kinds of wiring, but Article 725 does not cover those areas. For example, instrumentation tray cable and fire-resistive cable systems have their own articles within the NEC that focus on specific installation methods and performance criteria. Energy management systems encompass broader operational strategies and technologies for electricity usage and do not specifically fall under the scope addressed by Article 725.