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// CODE SNIPPET

1008.3 Emergency Power for Illumination

Building Code 2018 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination
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The power supply for means of egress illumination shall normally be provided by the premises' electrical supply.

1008.3.1 General

In the event of power supply failure in rooms and spaces that require two or more means of egress, an emergency electrical system shall automatically illuminate all of the following areas:
  1. Aisles.
  2. Corridors.
  3. Exit access stairways and ramps.

1008.3.2 Buildings

ILLUSTRATION
In the event of power supply failure in buildings that require two or more means of egress, an emergency electrical system shall automatically illuminate all of the following areas:
  1. Interior exit access stairways and ramps.
  2. Interior and exterior exit stairways and ramps.
  3. Exit passageways.
  4. Vestibules and areas on the level of discharge used for exit discharge in accordance with Section 1028.1.
  5. Exterior landings as required by Section 1010.1.6 for exit doorways that lead directly to the exit discharge.

1008.3.3 Rooms and Spaces

In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas:
  1. Electrical equipment rooms.
  2. Fire command centers.
  3. Fire pump rooms.
  4. Generator rooms.
  5. Public restrooms with an area greater than 300 square feet (27.87 m2).

1008.3.4 Duration

The emergency power system shall provide power for a duration of not less than 90 minutes and shall consist of storage batteries, unit equipment or an on-site generator. The installation of the emergency power system shall be in accordance with Section 2702.

1008.3.5 Illumination Level Under Emergency Power

Emergency lighting facilities shall be arranged to provide initial illumination that is not less than an average of 1 footcandle (11 lux) and a minimum at any point of 0.1 footcandle (1 lux) measured along the path of egress at floor level. Illumination levels shall be permitted to decline to 0.6 footcandle (6 lux) average and a minimum at any point of 0.06 footcandle (0.6 lux) at the end of the emergency lighting time duration. A maximum-to-minimum illumination uniformity ratio of 40 to 1 shall not be exceeded. In Group I-2 occupancies, failure of a single lamp in a luminaire shall not reduce the illumination level to less than 0.2 footcandle (2.2 lux).

Related Code Sections


1008.3 Means of Egress, Emergency Power for Illumination
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following ...
Building Code 2021 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination
1008.3 Means of Egress, Emergency Power for Illumination
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas: Electrical ...
Building Code 2018 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination
1008.3.1 Means of Egress, General
In the event of power supply failure in rooms and spaces that require two or more means of egress , an emergency electrical system shall ...
Building Code 2018 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination > 1008.3.1 General
1008.3.2 Means of Egress, Buildings
In the event of power supply failure in buildings that require two or more exits or access to exits, an emergency electrical system shall ...
Building Code 2021 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination > 1008.3.2 Buildings
1008.3.2 Means of Egress, Buildings
In the event of power supply failure in buildings that require two or more means of egress , an emergency electrical system shall automatically ...
Building Code 2018 of Illinois > 10 Means of Egress > 1008 Means of Egress Illumination > 1008.3 Emergency Power for Illumination > 1008.3.2 Buildings
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