Product Selection Guide Page 692 Product Selection Guide-11th Edition

PRODUCT INFORMATION PSG11 692 GENERAL INFORMATION Safety Codes NFPA 70 NATIONAL ELECTRICAL CODE 2014 Reprinted with permission from NFPA 70 , National Electrical Code , Copyright 2008, National Fire Protection Association, Quincy, MA. This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety. ARTICLE 700 Emergency Systems I. General 700.1 Scope The provisions of this article apply to the electrical safety of the installation, opera- tion, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted. FPN No. 1: For further information regarding wiring and installation of emergency systems in health care facilities, see Article 517. FPN No. 2: For further information regarding performance and maintenance of emergency systems in health care facilities, see NFPA 99-2012, Standard for Health Care Facilities. FPN No. 3: For specification of locations where emergency lighting is considered essential to life safety, see NFPA 101-2012, Life Safety Code. FPN No. 4: For further information regarding performance of emergency and standby power systems, see NFPA 110-2013, Standard for Emergency and Standby Power Systems. 700.7 Signs (A) Emergency Sources. A sign shall be placed at the service entrance equip- ment, indicating type and location of on-site emergency power sources. Exception: A sign shall not be required for individual unit equipment as specified in 700.12(F). (B) Grounding. Where removal of a grounding or bonding connection in normal power source equipment interrupts the grounding electrode conductor connec- tion to the alternate power source(s) grounded conductor, a warning sign shall be installed at the normal power source equipment stating: WARNING SHOCK HAZARD EXISTS IF GROUNDING ELECTRODE CONDUCTOR OR BONDING JUMPER CONNECTION IN THIS EQUIPMENT IS REMOVED WHILE ALTERNATE SOURCE(S) IS ENERGIZED. The warning sign(s) or label(s) shall comply with 110.21(B). II. Circuit Wiring 700.10 Wiring, Emergency System (A) Identification. All boxes and enclosures (including transfer switches, genera- tors, and power panels) for emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system. (B) Wiring. Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in 700.10 (B)(1) through (5): (1) Wiring from the normal power source located in transfer equipment enclosures (2) Wiring supplied from two sources in exit or emergency luminaires (lighting fixtures) (3) Wiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminaires (4) Wiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipment (5) Wiring from an emergency source to supply emergency and other loads in accordance with 700.10(B)(5)a, b, c, and d as follows: (a)Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads from all other loads. (b)The common bus or separate sections of the switchgear, or the individual enclosures shall be permitted to be supplied by single or multiple feeders without overcurrent protection at the source Exception to (5)(b): Overcurrent protection shall be permitted at the source or for the equipment, provided the overcurrent protection complies with the requirements of 700.28. (c)Emergency circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits. (d) It shall be permissible to utilize single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads. (C) Wiring Design and Location Emergency wiring circuits shall be designed and located so as to minimize the hazards that might cause failure due to flooding, fire, icing, vandalism, and other adverse conditions. (D) Fire Protection Emergency systems shall meet the additional requirements in 700.9(D)(1) and (D)(2) assembly occupancies for not less than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes: assembly, educational, residential, detention and correctional, business, and mercantile. (1) Feeder-Circuit Wiring Feeder-circuit wiring shall meet one of the following conditions: (1) Be installed in spaces or areas that are fully protected by an approved automatic fire suppression system (2) Be alisted electrical circuit protective system with a minimum 2-hour fire rating Informational Note: UL guide information for electrical circuit protective systems (FHIT) contains information on proper installation requirements to maintain the fire rating. (3) Be protected by alisted thermal barrier system for electrical system components with a minimum 2-hour fire rating (4) Be protected by alisted fire-rated assembly that has a minimum fire rating of 1 hour and contains only emergency wiring circuits (5) Be encased in a minimum of 50mm (2 in.) of concrete (2) Feeder-Circuit Equipment. Equipment for feeder circuits (including transfer switches, transformers, and panelboards) shall be located either in spaces fully protected by approved automatic fire suppression systems (including sprinklers, carbon dioxide systems) or in spaces with a 2-hour fire resistance rating. (3) Generator Control Wiring. Control conductors installed between the transfer equipment and the emergency generator shall be kept entirely independent of all other wiring and shall meet the conditions of 700.10(D)(1). III. Sources of Power 700.12 General Requirements. Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in 700.12(A) through (E). Unit equipment in accordance with 700.12(F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in 700.12(A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes - assembly, educational, residential, detention and correctional, business, and mercantile-shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating. For the definition of Occupancy Classification, see Section 6.1 of NFPA 101-2012, Life Safety Code . For further information, see ANSI/IEEE 493-2007, Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems. (A) Storage Battery . Storage batteries used as a source of power for emergency systems shall be of suitable rating and capacity to supply and maintain the total load for a minimum period of 11/2 hours, without the voltage applied to the load falling below 871/2 percent of normal. Batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service and shall be compatible with the charger for that particular installation. For a sealed battery, the container shall not be required to be transparent. However, for the lead acid battery that requires water additions, transparent or translucent containers shall be furnished. Automotive-type batteries shall not be used. An automatic battery charging means shall be provided. (F) Unit Equipment. (1) Components of Unit Equipment . Individual unit equipment for emergency illumination shall consist of the following: (1) A rechargeable battery (2) A battery charging means (3) Provisions for one or more lamps mounted on the equipment, or shall be permitted to have terminals for remote lamps, or both (4) A relaying device arranged to energize the lamps automatically upon failure of the supply to the unit equipment (2) Installation of Unit Equipment. Unit equipment shall be installed in accordance with 700.12(F)(2)(1) through (6). (1) The batteries shall be of suitable rating and capacity to supply and maintain at not less than 871/2 percent of the nominal battery voltage for the total lamp load associated with the unit for a period of at least 11/2 hours, or the unit equipment shall supply and maintain not less than 60 percent of the initial emergency illumination for a period of at least 11/2 hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service. (2) Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. (3) The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits that are not part of a multiwire branch circuit, a separate branch circuit for unit equipment shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. (4) The branch circuit that feeds unit equipment shall be clearly identified at the distribution panel. (5) Emergency luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment as required by 700.10 and by one of the wiring methods of Chapter 3. (6) Remote heads providing lighting for the exterior of an exit door shall be permitted to be supplied by the unit equipment serving the area immediately inside the exit door. IV. Emergency System Circuits for Lighting and Power 700.15 Loads on Emergency Branch Circuits No appliances and no lamps, other than those specified as required for emergency use, shall be supplied by emergency lighting circuits. 700.16 Emergency Illumination Emergency illumination shall include all required means of egress lighting, illuminated exit signs, and all other lights specified as necessary to provide required illumination. Emergency lighting systems shall be designed and installed so that the failure of any individual lighting element, such as the burning out of a lamp, cannot leave in total darkness any space that requires emergency illumination. Where high-intensity discharge lighting such as high- and low-pressure sodium, mercury vapor, and metal halide is used as the sole source of normal illumination, the emergency lighting system shall be required to operate until normal illumination has been restored. Where an emergency system is installed, emergency illumination shall be provided in the area of the disconnecting means required by 225.31 and 230.70, as applicable, where the disconnecting means are installed indoors. Exception: Alternative means that ensure that the emergency lighting illumination level is maintained shall be permitted. 700.17 Branch Circuits for Emergency Lighting Branch circuits that supply emergency lighting shall be installed to provide service from a source complying with 700.12 when the normal supply for lighting is interrupted. Such installations shall provide either of the following: (1)Anemergency lighting supply, independent of the normal lighting supply, with provisions for automatically transferring the emergency lights upon the event of failure of the normal lighting branch circuit (2)Two or more branch circuits supplied from separate and complete systems with independent power sources. One of the two power sources and systems shall be part of the emergency system, and the other shall be permitted to be part of the normal power source and system. Each system shall provide sufficient power for emergency lighting purposes. Unless both systems are used for regular lighting purposes and are both kept lighted, means shall be provided for automatically energizing either system upon failure of the other. Either or both systems shall be permitted to be a part of the general lighting system of the protected occupancy if circuits supplying lights for emergency illumination are installed in accordance with other sections of this article. 700.18 Circuits for Emergency Power For branch circuits that supply equipment classed as emergency, there shall be an emergency supply source to which the load will be transferred automatically upon the failure of the normal supply. LITHONIA LIGHTING EMERGENCY SYSTEMS

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