Which action should be avoided when re-fusing a potentially explosive capacitor?

Re-energizing a potentially explosive capacitor should be avoided because this action poses a significant risk of causing an explosion or the release of hazardous materials. When capacitors are suspected to have issues, such as leaks or swelling, they may be compromised and can fail violently if power is reapplied.

In the context of handling potentially hazardous equipment, safety protocols dictate that before any electrical component, especially those with a risk of explosion, is re-energized, a thorough inspection and a thorough understanding of the component's condition are necessary. The other actions mentioned, such as applying voltage slowly or inspecting for leaks, are part of safety protocols designed to assess and mitigate risks before proceeding with power restoration. Disconnecting the power is a precautionary measure that ensures safety during maintenance or inspection.