Definition of limited-energy cabling.

• A. Cabling used for high-voltage power distribution
• B. Cabling used for low-voltage control, signaling, and data with restricted voltage/current
• C. Cabling used only in outdoor installations
• D. Cabling with flexible insulation

Answer: (B)

Limited-energy cabling refers to lines that carry only low voltage and restricted current, used to transmit control signals, data, or other low-energy communications rather than delivering significant power. This category covers wiring for thermostat controls, building automation, security and fire signaling, and data networks, where the energy level is kept intentionally low for safety and signal integrity. It’s not about high-voltage power distribution, which is power wiring, and it isn’t defined by being outdoor-only or by having flexible insulation—the defining feature is the low energy and its role in control or signaling.