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3.2.7.6.(1)
ApplicationIntent
OS1OP1OP3OS3
ObjectiveOS3 Safety in Use
Attribution
[F81,F30-OS3.1] [F81,F11,F10,F12-OS3.7]
Application
Application 1: 
Installation of emergency electrical power supply systems for emergency equipment required by Part 3 for health care facilities.
This applies to emergency electrical power supply systems, for buildings described in Sentence 1.3.3.2.(1) of Division A, used to supply emergency power to:
  • emergency lighting systems, as required by Articles 3.2.7.3. and 3.2.7.4.,
  • fire alarm systems, as required by Article 3.2.7.8.,
  • voice communication systems in high buildings, as required by Sentence 3.2.7.8.(1),
  • elevators in buildings more than 36 m high, as required by Clause 3.2.7.9.(1)(a),
  • water supply for firefighting, as required by Clause 3.2.7.9.(1)(b), and
  • fans and other electrical equipment that are installed to maintain air quality and venting in high buildings defined in Subsection 3.2.6., as required by Clauses 3.2.7.9.(1)(c) and (d).
Exceptions: 
except as stated in Article 3.2.7.7., which applies to gas fuel-fired engines or turbines for an emergency electric power supply dependent on a fuel supply from outside the building.
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Intent
Intent 1: 
To limit the probability that emergency power supply 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 supply systems to supply emergency lighting systems to illuminate floor areas and egress routes, which could lead to safety hazards [bumping, tripping, falling, etc.], which could lead to harm to persons.
Intent 2: 
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 an emergency situation, which could lead to the inability of the emergency electrical power supply systems to supply emergency systems, which could lead to the inability of:
  • fire alarm or voice communication systems to promptly notify persons in the building,
  • emergency lighting systems to illuminate egress routes, and
  • elevator systems to be used in emergency response operations, which could lead to delays in emergency response operations.
This is to limit the probability of delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
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