Osha does not require the use of no exit.
Fire exit door signs regulations.
Exit signs are required designation and exit access and should be located with such size color contrast and design as to be visible incase of an emergency.
Each exit route door must be free of decorations or signs that obscure the visibility of the exit route door.
No exit sign is needed where any door passage or stairway that is neither an exit nor a way of exit access and that is located or arranged so that it is likely to be mistaken for an exit.
However guidance is provided in nfpa life safety code 101 section 7 10 8 3 1.
Also the line of sight to an exit sign must be clearly visible at all times.
Exit signs must be clear of decorations equipment which may impair visibility to means of an.
The nfpa emergency exit door requirements code states there is a maximum travel distance allowed to find an exit.
Post signs along the exit access indicating the direction of travel to the nearest exit and exit discharge if that direction is not immediately apparent.
1910 37 b 4 if the direction of travel to the exit or exit discharge is not immediately apparent signs must be posted along the exit access indicating the direction of travel to the nearest exit and exit discharge.
Exit sign regulations and requirements for your local area.
If there is a fire in the area where occupants are they are already being exposed to smoke fire and heat.
Fire exit signs are not a requirement if it is obvious where the exit is for example when there is just one door at the front of a small shop where it is clear that would be the.