How long must the emergency generator operate on the stored fuel?

The requirement for an emergency generator to operate on stored fuel for a duration of 48 hours is typically based on industry standards and regulations designed to ensure preparedness for extended power outages. In many cases, a 48-hour duration is seen as a balance between ensuring sufficient fuel supply for emergencies while also allowing for logistical considerations in fuel replenishment and availability.

This duration assumes that in the event of an emergency requiring generator operation, an organization may need to sustain critical functions while simultaneously addressing the situation, which could involve refueling efforts within that timeframe. Furthermore, the 48-hour standard provides a buffer to address short-term disruptions while negating the need for excessive fuel storage, which could pose logistical or safety challenges.

While other options might suggest longer durations, the specific requirement of 48 hours aligns with regulatory standards that take into account both the need for operational reliability and the practical constraints that organizations may face during emergencies.