Non-maintained safety sign
Non-maintained safety sign
Sign in which the integral lamps are in operation only when the power supply to the normal lighting fails.
- Document
- ISO
- Context
- International Standard
- Origin document
ISO 3864-4:2011(en) Graphical symbols — Safety colours and safety signs — Part 4: Colorimetric and photometric properties of safety sign materials
- Reference Link
- https://www.iso.org/obp/ui/en/Release