LIFE SAFETY CODE EXCERPT (NFPA 101) - 2009
7.8 Illumination of Means of Egress.
7.8.1 General
7.8.1.1* Illumination of means of egress shall be provided in accordance with
Section 7.8 for every building and structure where required in Chapter 11 through
Chapter 42. For the purposes of this requirement, exit access shall include only
designated stairs, aisles, corridors, ramps, escalators, and passageways leading
to an exit. For the purposes of this requirement, exit discharge shall include only
designated stairs, aisles, corridors, ramps, escalators, walkways, and exit passage
ways leading to a public way.
7.8.1.2 Illumination of means of egress shall be continuous during the time that the
conditions of occupancy require that the means of egress be available for use, unless otherwise provided in 7.8.1.2.2.
7.8.1.2.1 Artificial lighting shall be employed at such locations and for such periods
of time as are necessary to maintain the illumination to the minimum criteria values
herein specified.
7.8.1.2.2 Automatic, motion sensor-type lighting switches shall be permitted within
the means of egress, provided that the switch controllers are equipped for fail-safe
operation, the illumination timers are set for a minimum 15-minute duration, and
the motion sensor is activated by any occupant movement in the area served by the
lighting units.
7.8.1.3* The floors and other walking surfaces within an exit and within the
portions of the exit access and exit discharge designated in 7.8.1.1 shall be
illuminated as follows:
(1) During conditions of stair use, the minimum illumination for new stairs shall be
at least 10 ft-candle (108 lux), measured at the walking surfaces.
(2) The minimum illumination for floors and walking surfaces, other than new
stairs during conditions of stair use, shall be to values of at least 1 ft-candle
(10.8 lux), measured at the floor.
(3) In assembly occupancies, the illumination of the floors of exit access shall be
at least 0.2 ft-candle (2.2 lux) during periods of performances or projections
involving directed light.
(4)* The minimum illumination requirements shall not apply where operations or
processes require low lighting levels.
7.8.1.4* Required illumination shall be arranged so that the failure of any single
lighting unit does not result in an illumination level of less than 0.2 ft-candle (2.2
lux) in any designated area.
7.8.1.5 The equipment or units installed to meet the requirements of Section 7.10
also shall be permitted to serve the function of illumination of means of egress,
provided that all requirements of Section 7.8 for such illumination are met. |
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