Under what conditions is a DANGER tag installed at equipment control stations in preparation for performing maintenance or repairs?

Correct Answer: Option A — When operation of the equipment will endanger personnel OR harm the equipment.

Danger tags are mandatory under safety management systems when equipment operation poses a direct threat to human life or could cause catastrophic mechanical failure. They serve as a definitive prohibition against operation, ensuring that no personnel inadvertently energize systems that are currently unsafe for service or maintenance.