Below is a definition from the course material. It sounds much like a legal document that doesn’t paint a clear picture of what this definition means unless you have prior knowledge.
A clear example of these types of descriptions would be very helpful to fully understanding what this and other definitions are referring too. Maybe showing and example of said device would help give a visual since all our inspections we Looking (Visually) for issues.
Arc-Fault Circuit Interrupter AFCI is a “DEVICE” that provides protection from the effects of arc-faults by recognizing arcing and deenergizing the circuit when an arc-fault is detected.