Field Story · Electrical Safety
The Live Panel That Should Have Been Dead
An electrician opened a distribution panel to trace a fault, believing a colleague had isolated it. It was still live. A dropped tool bridged two terminals and produced an arc flash.
The isolation had been assumed, not proven. There was no lock on the isolator and no test to confirm the panel was dead before work began. The arc caused burns and destroyed the panel; the worker was fortunate the injuries were survivable.
The lesson
Safe isolation means locking off, tagging, and then testing to prove dead every time, with no exceptions. A lockout-tagout procedure and insulated tools rated to the right standard turn a fatal assumption into a verified fact.
This is a composite case study built from common near-miss patterns, used to illustrate the safety principles involved. It does not describe a specific real person or workplace.