If the ESS transfers power to the actual fire pump, not the controller, in 10.2 seconds is that ok.

The Emergency Power Supply System (ESS) transferring power to the actual fire pump within 10.2 seconds is not acceptable according to the standards set by the National Fire Protection Association (NFPA).
The NFPA 110: Standard for Emergency and Standby Power Systems, Section 5.6.4, states that the transfer of power from the normal source to the emergency source should occur within 10 seconds for a Level 1 system. This standard is also echoed in the NFPA 20: Standard for the Installation of Stationary Pumps for Fire Protection, which specifically deals with fire pumps.
However, it’s important to note that these standards refer to the transfer of power to the fire pump controller, not the actual fire pump. The fire pump controller is the device that manages the operation of the fire pump, including starting and stopping the pump based on the pressure in the fire sprinkler system.
Transferring power directly to the fire pump, bypassing the controller, could potentially damage the pump or cause it to operate improperly. The controller is designed to manage the start-up process of the pump to prevent damage from sudden pressure changes, and to ensure that the pump operates at the correct pressure to effectively supply the fire sprinkler system.
In conclusion, the ESS should transfer power to the fire pump controller, not the actual fire pump, and this transfer should occur within 10 seconds to comply with NFPA standards.