To limit the probability that inappropriate emergency power supply sources for fire alarm systems will be used, which could lead to the fire alarm systems not operating properly when there is a failure of the normal power source to the fire alarm system in a fire situation, which could lead to emergency responders not being promptly notified of the fire, which could lead to delays or ineffectiveness in carrying out fire emergency response operations, which could lead to the spread of fire, which could lead to damage to the building.