Brief Description of Incident:
A Station Operator closed a Breaker to energize a Panel to restore the panel to service Panel which fed a 600V switchboard. When the panel was energized, it faulted causing an arc flash and fire. Zero harm as a result of the switching team following the Work Methods, Tailboards, ARC Flash Awareness, and appropriate PPE.
Contributing Causal Factors : The work area where a distribution breaker in the panel had been replaced was checked. A written practice to check/test the whole electrical distribution panel following the completion of the work to ensure excess materials and tools are removed, and other issues have been unintentionally created, needs to be developed. Had checks been completed, such as meggaring the panel, the root cause could possibly have been identified prior to the incident.