Not An Emergency Exit Symbol Sign
NFPA 170 Symbol
This Not An Emergency Exit Symbol Sign uses safety messages for emergency response protocol and compliance. A Not An Emergency Exit Symbol Sign is a useful tool to help protect the health and safety of personnel, but is not a substitute for required protective measures for eliminating or reducing hazards.
Each doorway or passage along an exit access that could be mistaken for an exit must be marked "Not an Exit" or similar designation, or be identified by a sign indicating its actual use (e.g., closet).