When is it permissible for members to enter an electrical substation on fire?

Entering an electrical substation on fire is a complex decision that requires careful consideration of safety protocols. The most appropriate answer in this context is when there is a savable victim needing immediate rescue. This option emphasizes the priority of saving lives in emergency situations, which is fundamental in firefighting and rescue operations.

In situations where a person is trapped or in immediate danger, the need to act swiftly can override typical safety protocols. Firefighters are trained to assess risks versus the urgency of life-saving measures, and the potential to save a victim may warrant entering a hazardous environment like an electrical substation.

The other options deal with safety and authorization concerns, which are essential, but the immediacy of a life at risk can justify actions that might otherwise be deemed unsafe. For example, a confirmed electrical fault or prioritizing personnel safety can often lead to a more cautious approach that may delay action, whereas the presence of a savable victim necessitates immediate intervention. Ultimately, the rescue of a life is the primary concern, guiding decision-making in critical emergency situations.