Which of the following conditions may require tagging equipment with danger tags?

Tagging equipment with danger tags is primarily necessary when electrical hazards are detected. This practice serves a critical role in ensuring safety by alerting personnel to the presence of potential hazards that could lead to serious accidents or injuries. When electrical issues are present, the danger tags effectively communicate that the equipment must not be operated until the hazard has been resolved.

The use of danger tags is a key safety measure in various environments where machinery and electrical systems are involved, promoting a clear understanding among all crew members about the risks associated with that specific equipment. In contrast, routine maintenance checks, unauthorized operation, or crew training status do not directly indicate the immediate presence of hazards that necessitate tagging for safety. While maintenance and unauthorized access may pose risks, they do not specifically warrant the same level of immediate caution as detected electrical hazards do.