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9.9.11.3.(3) | Application | Intent |
| OS3 |
| Objective | OS3 Safety in Use |
| Attribution | |
| Application | Application 1: Actuation and minimum duration of operation of the
lighting required in Sentence (1) [emergency lighting
in exits, principal routes providing access
to exits in open floor areas, corridors
used by the public, underground walkways, and public corridors ], when the [normal] electric lighting
in the affected area is interrupted, in buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9]. Application 2: This also applies to the illumination of exit signs,
as stated in Sentence 9.9.10.7.(1).
Exceptions:
except for exits that serve only one dwelling unit, as stated in Sentence 9.9.11.1.(1).
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| Intent | Intent 1: To limit the probability that certain areas in buildings
will have inadequate illumination when there is a loss of normal power, which
could lead to safety hazards [bumping, tripping, falling, etc.], which could
lead to harm to persons. Intent 2: To limit the probability that certain areas in buildings
will have inadequate illumination when there is a loss of normal power in
an emergency situation, 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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