ICC Certified Fire inspector One Practice Test

The requirement for emergency lighting systems to activate during a power outage is outlined in various codes and standards, such as the National Fire Protection Association (NFPA) guidelines. According to the NFPA, emergency lighting must provide illumination without delay to ensure the safety of occupants. The correct activation time for most emergency lighting systems is within 90 seconds. This timeframe ensures that occupants have sufficient visibility to navigate safely during an unexpected power loss, allowing them to find exits and evacuate the building effectively.

The standards are established to prioritize safety during emergencies, aligning with the importance of immediate response to any loss of normal lighting. The option that specifies 90 seconds accurately reflects this guideline, ensuring a prompt response that mitigates risks associated with evacuations in low-light conditions.