In the event of a failure of normal power, how quickly must the alternate source be connected to the load in a hospital's essential electrical system?

The requirement for connecting an alternate power source in the event of a failure of normal power in a hospital's essential electrical system is indeed set at a maximum of 10 seconds. This timeframe is critical to ensure continuous power supply to life-saving equipment and maintain essential services within hospital settings.

A rapid switch to an alternate power source is crucial because many medical devices, such as ventilators and monitors, must remain operational without interruption to avoid jeopardizing patient safety. A 10-second window allows for a swift response while still providing enough time to ensure the transfer process is carried out safely and effectively.

This standard is often driven by regulatory requirements, ensuring that all essential systems remain online to provide uninterrupted patient care. Hence, the option indicating a requirement of 10 seconds aligns with the protocols and standards established for healthcare facilities.