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1006.3 Illumination Emergency Power
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The power supply for means of egress illumination shall normally be provided by the premise's electrical supply.
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas:
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas:
- Aisles and unenclosed egress stairways in rooms and spaces that require two or more means of egress.
- Corridors, exit enclosures and exit passageways.
- Exterior egress components at other than their levels of exit discharge until exit discharge is accomplished for buildings required to have two or more exits.
- Interior exit discharge elements, as permitted in Section 1027.1, in buildings required to have two or more exits.
- Exterior landings as required by Section 1008.1.6 for exit discharge doorways in buildings required to have two or more exits.
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 Chapter 27.
Emergency lighting facilities shall be arranged to provide initial illumination that is at least an average of 1 foot-candle (11 lux) and a minimum at any point of 0.1 foot-candle (1 lux) measured along the path of egress at floor level. Illumination levels shall be permitted to decline to 0.6 foot-candle (6.46 lux) average and a minimum at any point of 0.06 foot-candle (0.646 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 buildings that contain existing photoluminescent exit path markings tested in laboratory conditions with greater than 1 foot-candle (11 lux) of activating illumination, the initial illumination shall not be less than that required for activating the approved photoluminescent illumination.
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