Exits, other than main exterior exit doors that obviously and clearly are identifiable as exits, shall be marked by an approved sign that is readily visible from any direction of exit access.
Access to exits shall be marked by approved, readily visible signs in all cases where the exit or the way to reach it is not readily apparent to the occupants.
188.8.131.52.2 New sign placement shall be such that no point in an exit access corridor is in excess of the rated viewing distance or 30 m (100 ft), whichever is less, from the nearest sign.
7.10.2 Directional Signs. A sign complying with 7.10.3 with a directional indicator
showing the direction of travel shall be placed in every location where the direction of travel to reach the nearest exit is not apparent.
7.10.3 Sign Legend
184.108.40.206 Signs required by 7.10.1 and 7.10.2 shall read as follows in plainly legible letters, or other appropriate wording shall be used: EXIT.
7.10.5 Illumination of Signs
Every sign required by 220.127.116.11 or 18.104.22.168 shall be suitably illuminated by a reliable light source. Externally and internally illuminated signs shall be visible in both the normal and emergency lighting mode.
7.10.7 Internally Illuminated Signs
22.214.171.124 Listing. Internally illuminated signs shall be listed in accordance with UL 924, Standard for Safety Emergency Lighting and Power Equipment, unless they meet one of the following criteria:
(1) They are approved existing exit signs.
(2) They are existing signs having the required wording in legible letters not less then 100 mm (4 in.) high.
(3) They are signs that are in accordance with 126.96.36.199 and 188.8.131.52.
7.10.9 Testing and Maintenance
Exit signs shall be visually inspected for operation of the illumination sources at intervals not to exceed 30 days, or shall be periodically monitored inaccordance with 184.108.40.206.3.
Exit signs connected to or provided with a batteryoperated emergency illumination source, where required in 7.10.4, shall be tested and maintained in accordance with 7.9.3.
SOURCE: NATIONAL FIRE PROTECTION ASSOCIATION 101 LIFE SAFETY CODE – 2003 EDITION