Single strand C-wire is described as a:

• A. A heavy-duty gate used for access control.
• B. A type of long-range detection system.
• C. A single, tensioned wire used as a tripwire to detect intrusion.
• D. A boundary marker painted on the ground.

Answer: (C)

A single strand C-wire is a simple perimeter detection method. It’s a taut, single wire stretched along or near a boundary that performs its function by being disturbed or touched. When intrusion occurs, the motion or contact trips a sensor or switch, triggering an alarm. This makes it an effective, low-cost early-warning measure without providing a physical barrier like a heavy-duty gate, and it isn’t a long-range sensing method that detects presence from a distance. It’s also not just a ground marker—its purpose is to detect contact and alert you to intrusion.