To limit the probability that emergency electrical power supply systems will not meet proper standards, which could lead to emergency electrical power supply systems not performing in the way intended when there is a loss of normal power in a fire situation, which could lead to the inability of the emergency electrical power supply systems to supply fire protection systems, which could lead to the inability of water supply and fire protection systems [that rely on booster or fire pumps, or electrical power] to control or suppress a fire, which could lead to the spread of fire from the subject building to an adjacent building, which could lead to damage to an adjacent building.