How does a short circuit affect system supervision?

• A. It can cause a delayed fault signal and no impact on devices.
• B. It has no effect on supervision.
• C. It triggers automatic system reset and clears fault signals.
• D. It can cause immediate fault signals and disable the circuit or devices until isolated.

Answer: (D)

System supervision continuously monitors the wiring and devices for faults. When a short circuit happens, the current path becomes abnormal and this is detected instantly by the supervising circuitry. The immediate result is a fault signal and the circuit or devices on that loop are disabled until the fault is isolated and the system is reset. This quick response prevents continuing operation on a faulted path and ensures the issue is addressed before service can resume. Delayed signals, no effect, or automatic reset clearing faults don’t match how supervised circuits respond, since the purpose is to flag and isolate faults right away.