To limit the probability that emergency power systems will not operate as originally intended when there is a loss of normal power, which could lead to the inability of the emergency power systems to supply emergency lighting systems to illuminate floor areas and egress routes, which could lead to safety hazards [such as bumping, tripping, falling, etc.], which could lead to harm to persons.
To limit the probability that deficiencies in emergency power systems will go unnoticed, which could lead to corrective action on such deficiencies not being taken, which could lead to emergency power systems not operating as originally intended when there is a loss of normal power in an emergency situation, which could lead to the inability of the emergency power systems to supply emergency systems, which could lead to the inability of:
This is to limit the probability of harm to persons.