22 August 2006
Each base must establish either red or green as the standard lettering
color. Installations in or near jurisdictions with established exit sign
lettering colors should adopt similar red or green standards. Do not
replace existing exit signs meeting NFPA 101 requirements simply to
standardize sign colors. When signs must be replaced for other reasons,
use the installation color.
Installations overseas can use different colors, pictorials, or bilingual
lettering as necessary to comply with local national standards. All exit
signs must be immediately obvious as an exit marking to a recently
transferred or visiting U. S. citizen. Additional markings are permitted to
comply with host nation standards.
Acceptable Exit Signs:
Use LED exit signs with illuminated letters displayed on an opaque
background unless directed otherwise for particular applications.
Prohibited Exit Signs:
Radioluminous. All existing signs were required to be replaced by 1 June
Incandescent. Do not use signs lit by incandescent lamps in new
construction. Existing incandescent signs can remain in service. When
replacement is dictated by maintenance or construction requirements,
replace the signs with LED exit signs, or refit them with LED conversion
Testing of Emergency Lighting Equipment. Because of the periodic testing
requirements, accessibility of equipment is an important design consideration. Ensure
that emergency lighting equipment is installed in conspicuous and accessible locations
to facilitate the periodic testing requirements.
INSTALLATION REQUIREMENTS. The National Electrical Contractors
Association (NECA) and the IESNA have produced extensive documentation on
recommended practices for lighting installation. These documents include:
NECA/IESNA 500 and NECA/IESNA 502. Installation, operation, and maintenance
issues are also detailed in ANSI C2-2002.
Wetness. Determine whether "dry", "damp", or "wet" conditions apply.
Environmental Conditions. Determine whether any special environmental
conditions apply, such as a corrosive or explosive atmosphere, extremely cold or hot
locations, marine/salt water atmosphere, clean room, food preparation area, or other
Structural Support. Determine the supporting means for the lighting systems,