Safe condition sign (green)
A green square or rectangle with a white pictogram marks a safe condition: an emergency exit or escape route, a first-aid point, an eyewash or an assembly point.
How to read it
ISO 3864-1 defines a safe condition sign as one that indicates “an evacuation route, the location of safety equipment or a safety facility, or a safety action”, and gives it a green square with a white symbol. ISO 7010 numbers these signs with an E: E001 and E002 are the emergency exit, left hand and right hand, E003 is the first-aid sign, E004 emergency telephone and E007 evacuation assembly point. Great Britain’s 1996 regulations list signs for the emergency exit or escape route, first-aid post, stretcher, safety shower, eyewash and emergency telephone, with green covering at least half the sign.
Also searched as: emergency exit sign, green safety sign, iso 7010 safe condition.
These explain what a sign’s signal word, colour and shape mean. For what to do in a hazard area, follow the site’s own signs, instructions and trained staff.
Exit signs in the United States
Most American exit signs spell out EXIT instead of showing the running figure, and most are red. OSHA’s construction rule calls for red letters at least 15 cm (6 inches) high on a white field. The National Fire Protection Association’s code requires contrast between the letters and the background, not a red colour, Slate reported in 2010, and New York City changed its fire code in 2006 to require the ISO pictogram on fire doors in high-rises.
Look-alikes
A red square with a white pictogram is a fire equipment sign, ISO 7010’s F category, for a fire extinguisher, fire hose reel or fire alarm call point. On American ANSI signs, a green panel reading SAFETY INSTRUCTIONS is for safety-related instructions or procedures, and OSHA’s older safety instruction signs are white with a green panel.
More safety signs
Browse symbols drawn with squares and rectangles.
Sources
- ISO 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety signs and safety markings (preview), ISO 3864-1:2011, International Organization for Standardization, preview via iTeh Standards, 3.8, Table 1
- ISO 7010:2011, Graphical symbols — Safety colours and safety signs — Registered safety signs (preview), ISO 7010:2011, International Organization for Standardization, preview via iTeh Standards, 4.3, Table 2
- The Health and Safety (Safety Signs and Signals) Regulations 1996, Schedule 1, SI 1996/341, legislation.gov.uk (UK Government), Part II, 3.4
- The Big Red Word vs. the Little Green Man, Julia Turner, March 2010, Slate
- Exit Sign Standards, The ANSI Blog, American National Standards Institute
- Accident prevention signs and tags (29 CFR 1926.200), 29 CFR 1926.200, U.S. Occupational Safety and Health Administration, 1926.200(d)
- Product Safety Signs and Labeling: ANSI Z535.4-2023, The ANSI Blog, American National Standards Institute
- Specifications for accident prevention signs and tags (29 CFR 1910.145), 29 CFR 1910.145, U.S. Occupational Safety and Health Administration, 1910.145(d)(6)
Last reviewed September 30, 2026 by Rory Hansen. How we research