This European Standard provides a scheme for the classification of artificial non-electrical sources of incoherent optical radiation with regard to their radiation emissions. It helps users of the sources to easily carry out a risk assessment when people can be exposed to radiation from the sources. This standard applies for sources emitting optical radiation in the wavelength between 180 nm and 3 000 nm. This standard does not apply for electrically powered sources.This standard does not apply for machinery, for laser devices and for lamps and lamp systems.NOTEA classification for machinery is given in EN 12198-1 [9], a classification for laser devices is given in EN 60825-1 [11] and a classification for lamps and lamp systems is given in EN 62471 [12].