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Incident Prevention Magazine

Rey Gonzalez

The Power of Human Intuition

Some time ago, two of my students and I observed as two operators replaced fuses on a 6.9-kV electrical bus. Both operators were new to this task that had only recently been turned over to them from their company’s electrical department. When my students and I approached the bus from the front side, I noticed that it was energized. We started our observation in a bus cubicle where the breaker was racked out and de-energized. The operators replaced fuses in a compartment above the breaker cubicle without physically opening the breaker cubicle door, only the compartment above. This was accomplished using gloves for PPE. Once the task was completed, the operators went to the back side of the bus. They began to open the large back door of another breaker cubicle, and at that point the hair on my arms stood up and the little voice inside my head asked, “Isn’t that breaker cubicle energized? I don’t think this is the same breaker cubicle, and why are they doing this without arc protective gear?”

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