What type of fire would require using normal fire procedures, like those for A, B, or D?

De-energized Charlie fires refer specifically to those involving energized electrical equipment. When these fires are de-energized, they transform into a situation where standard fire-fighting procedures apply. This means that firefighters can engage with the situation using conventional methods without the additional precautions necessary for energized equipment.

In fire classifications, normally fire procedures would typically be applied to class A (ordinary combustibles like wood and paper), class B (flammable liquids), or class D (combustible metals). Since de-energized Charlie fires can occur after the electrical source has been safely removed, they fall within the realm of these more standard methods as there are no longer the risks associated with live electricity.

The other options do not align with the prompt, as Delta fires are specific to combustible metals and have a unique response protocol. Electrically charged fires necessitate special techniques to prevent further risks, and AFFF (Aqueous Film Forming Foam) responses are primarily used for flammable liquid fires.