Which equipment is typically powered by back-up energy sources during power outages?

Which equipment is typically powered by back-up energy sources during power outages?

• A. HVAC systems.
• B. Office computers.
• C. Entertainment systems.
• D. Life safety equipment such as fire alarms and emergency lighting.

Answer: (D)

When power fails, safety-critical devices must keep functioning to protect occupants and enable a safe evacuation. Life safety equipment is specifically designed to run on emergency power sources—such as batteries or generators—so fire alarms can continue to detect incidents and alert occupants, and emergency lighting and exit signs remain illuminated to guide people to safety. The other systems—like HVAC, office computers, and entertainment equipment—are not required to operate on backup power in typical life safety scenarios, because they are not essential to life safety during an outage.

When power fails, safety-critical devices must keep functioning to protect occupants and enable a safe evacuation. Life safety equipment is specifically designed to run on emergency power sources—such as batteries or generators—so fire alarms can continue to detect incidents and alert occupants, and emergency lighting and exit signs remain illuminated to guide people to safety. The other systems—like HVAC, office computers, and entertainment equipment—are not required to operate on backup power in typical life safety scenarios, because they are not essential to life safety during an outage.