(a) Every public hall and stairway in every multiple dwelling containing five or more dwelling units shall be adequately lighted at all times. Every public hall and stairway in structures devoted solely to dwelling occupancy and containing not more than four dwelling units may be supplied with conveniently located light switches, controlling an adequate lighting system, which may be turned on when needed instead of full time lighting.
(b) On and after July 1, 1974 an emergency lighting system or systems shall be installed and maintained at all times in multiple dwelling structures within the City as follows:
(1) In all multiple dwelling structures of more than five living units, where no natural light is provided or having more than two stories above finished ground level, every public hallway, stairway and entryway shall be provided with an emergency lighting system so as to automatically provide a minimum illumination of not less than 1.0 foot-candle measured at the floor in the event of failure of normal power due to any fault in the system, or to any failure of the public utility or other outside electric power supply, or any manual act such as accidental opening of a switch controlling normal power facilities.
(2) The emergency lighting system to systems shall be either continuous in operation or capable or repeated automatic operation without manual intervention, and may be provided by any method or combination of methods which will produce the desired results.
(3) Where battery powered emergency lighting system or systems is provided, it shall be capable of providing required illumination for a period of not less than one-half hour. Such systems shall have an automatic charging device capable of recovering the batteries from a ninety-one percent (91%) voltage discharged state to full charge in a maximum of twelve hours. Battery powered emergency lighting equipment shall be approved by Underwriter's Laboratories, Inc. or any other approved testing agency as specified in the Ohio Basic Building Code.
(4) All emergency lighting systems shall have electrical circuits separate and apart from the other wiring systems of the multiple dwelling structure.
(5) Lack of natural light in public hallways, stairways, entryways, etc. requiring an emergency lighting system is defined as follows:
A. A light level at thirty inches above the floor measured in foot-candles maintained in service of less than five.
B. A light level at thirty inches above finished floor measured in foot-candles maintained in service of less than five, when light is transmitted through fenistration from outside sources during the night-time hours.
(Ord. 1974-62. Passed 5-20-74.)