Which statement best describes arc flash incidents frequency?

• A. They never occur in automatic systems
• B. They only occur in industrial settings outside the US
• C. Industry estimates show about 5 to 10 arc flash incidents occur daily in the US
• D. They are completely preventable with safe practices

Answer: (C)

Arc flash frequency is not rare; there is a real, ongoing risk in everyday electrical work. Industry sources estimate that several arc flash incidents happen each day in the United States, roughly five to ten per day. This underscores why safety measures and proper PPE are essential, even in automated or routine operations, and why arc flash prevention is an ongoing priority across many settings.

The other statements don’t fit because arc flashes can occur in automated systems as well as manual ones; they’re not confined to outside-the-US settings. And while safe practices greatly reduce risk, they don’t make it completely preventable—there’s always some residual risk from faults, equipment failures, and human factors.