If a fault current exceeds the capability of the OCPD to interrupt, the OCPD may what?

When a fault current exceeds the interrupting capability of an Overcurrent Protective Device (OCPD), such as a circuit breaker or fuse, the device can become overwhelmed. If this happens, the device may violently rupture due to the excessive energy generated by the fault current. This rupture can potentially release hazardous materials or cause further damage to the electrical system or surrounding areas.

Understanding this scenario emphasizes the importance of selecting an OCPD with an adequate interrupting rating that aligns with the potential fault currents in a given electrical system. This knowledge ensures that protective devices can adequately respond to electrical faults without failing in a destructive manner.

The other options, while they might reflect different behaviors of electric devices under various circumstances, do not accurately describe the outcome when the fault current exceeds the interrupting capabilities of an OCPD, which highlights the catastrophic risk presented in this situation.