How frequently must elevators equipped with firefighter service be tested for phase I and phase II?

Elevators equipped with firefighter service, specifically those that operate under Phase I and Phase II, are critical components in ensuring the safety of occupants during an emergency situation. Testing these systems is essential to confirm their functionality and reliability.

The requirement to test these elevators at least monthly stems from the need to guarantee that they are in optimal working condition when they are needed the most. Monthly tests help identify any potential malfunctions or issues that could impede the elevator's operation during a fire or another emergency situation. Regular inspections and testing ensure that the phased operation, which allows firefighters to control the elevator, is reliable and will function as designed.

In contrast, options that suggest less frequent testing, such as annually, quarterly, or bi-weekly, do not provide the necessary assurance that these vital systems are consistently maintained. Insufficient testing frequencies could lead to undetected mechanical failures or issues that could compromise safety during critical life-saving operations. Therefore, the correct answer emphasizes the importance of maintaining a rigorous testing schedule to ensure that these elevators are ready for immediate use in emergencies.