Electric shock caused by burning of the wiring board

In a bustling factory known for its precision and efficient production lines, tragedy struck when a routine maintenance task spiraled into a fatal electric shock accident.

The incident involved two welders, A and B, who were tasked with spot welding iron shells using a welding machine. During their task, they identified that a section of the welding machine's lead coil was broken. To address this problem, A, an electrician, procured a segment of soft wire and instructed B, another electrician, to replace the defective section. While B was fixing the wiring, he noticed that the bolts of the primary wire connection board were loose and took the initiative to tighten them with a wrench. Unfortunately, A was not present during these critical moments of maintenance. Unbeknownst to him, B carried out a few test welds and then left the work site. When A returned, he assumed everything was in order and resumed spot welding. This assumption proved to be fatal. Within a few attempts, A screamed and collapsed, having been electrocuted. Nearby worker C swiftly turned off the power supply, but the delay in rescue efforts proved fatal as A succumbed to the electric shock.

The investigation into the tragedy revealed two primary reasons for the accident: the terminal board had burned, leading to a short circuit as the coil touched the welding machine shell, and critically, the welding machine shell was not grounded. This incident underscores the importance of stringent safety protocols and the need for thorough communication during equipment maintenance. Firstly, all maintenance and repair tasks should be exclusively handled by certified electricians trained for such intricate work. This ensures that every safety measure is meticulously followed. Secondly, grounding of welding equipment is non-negotiable to prevent any accidental electrification of the machine's shell. The absence of proper grounding was a glaring oversight that turned a manageable fault into a deadly hazard. Regular safety training and equipment checks, along with fostering a culture of clear communication and accountability, are essential measures in preventing such tragic accidents. Moreover, implementing systematic checks and balances where maintenance tasks are verified by more than one professional before resuming operations can act as a critical safety net. It is paramount for factory operations to prioritize worker safety over production efficiency, ensuring that every piece of equipment is in optimal condition and every step is taken to secure a safe working environment.

This harrowing incident serves as a stark reminder that in industrial settings, where machinery and electrical components are involved, vigilance, and adherence to safety protocols are lifesaving imperatives.