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Fire Protection Glossary - E


Educational Occupancy. Educational occupancies include all buildings or portions of buildings used for educational purposes through the twelfth grade by six or more persons for four or more hours per day or more than 12 hours per week. Educational occupancies include academies, nursery schools, kindergartens, and schools.

EIA-232 and EIA-485. Communications interface standards as described by the Electronics Industries Association, a US standards making organization.

Ember. A particle of solid material that emits radiant energy due either to its temperature or the process of combustion on its surface. (See Spark). Class A and Class D combustibles burn as embers under conditions where the flame typically associated with fire does not necessarily exist. This glowing combustion yields radiant emissions in parts of the radiant energy spectrum that are radically different from those parts affected by flaming combustion. Specialized detectors, specifically designed to detect those emissions, should be used in applications where this type of combustion is expected. In general, flame detectors are not intended for the detection of embers.

Emergency Voice/Alarm Communications. Dedicated manual or automatic facilities for originating and distributing voice instructions, as well as alert and evacuation signals pertaining to a fire emergency, to the occupants of a building.

End-of-Line Device. A device used to terminate a supervised circuit. Typically a resistor or diode is installed in series at the end of a two-wire circuit to maintain supervision.

End-of-Line Relay. A relay used to supervise power, for example, supplied to a 4-wire smoke detector or power to an addressable device. The relay is installed within or adjacent to the last powered device on the circuit.

Erasable Programmable Read Only Memory (EPROM). A nonvolatile semiconductor memory component whose contents may be erased, usually through exposure to ultraviolet light. EPROM's are used to store digital data.

Evacuation. The withdrawal of occupants from a building. Evacuation does not include relocation of occupants within a building.

Evacuation Signal. A distinctive signal intended to be recognized by the occupants as requiring evacuation of the building.

Existing. That which is already in existence on the date when the current edition of the Code goes into effect. See Building, Existing.

Exit. That portion of a means of egress that is separated from all other spaces of the building or structure by construction or equipment as required in NFPA 101 5- to provide a protected way of travel to the exit discharge. Exits include exterior exit doors, exit passageways, horizontal exits, separated exit stairs, and separated exit ramps.

Exit Access. That portion of a means of egress that leads to an exit.

Exit Plan. A plan for the emergency evacuation of the premises.

External Interface. An EIA-485 bi-directional serial port used to upload and download data.
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Some information may be found within this web site that is reprinted with permission from one or more of the following: NFPA 70 National Electrical Code®,NFPA 72® National Fire Alarm Code®, & NFPA 101® Life Safety Code®, Copyright© NFPA, Quincy, MA 02269.

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.