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3.2.7.8.(3)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Minimum duration of supervisory power and of emergency power under full load, for fire alarm systems.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A in which fire alarm systems are installed.
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Intent
Intent 1: 
To limit the probability that, during a failure of the normal power supply to a fire alarm system, the fire alarm system will not be capable of performing its intended functions for a length of time sufficient for normal power to be restored, which could lead to:
  • persons not being promptly notified in a fire situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
  • emergency responders not being promptly notified of a fire situation, which could lead to delays or ineffectiveness in carrying out fire emergency response operations, which could lead to:
    • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
    • the spread of fire, which could lead to harm to persons.
Intent 2: 
To limit the probability that, during a failure of the normal power supply to a fire alarm system in a fire situation, the fire alarm system will not be capable of performing its intended functions for a length of time sufficient for persons to evacuate or move to a safe place, which could lead to persons not being promptly notified of the fire, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
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