This part specifies the requirements for luminaires that need to limit the temperature of the outer surface. The luminaires are used in places where there is no danger of explosion, but there is a risk of accumulation of combustible dust on the luminaires. The voltage of the light source used by the lamp shall not exceed 1000V. The content of this section does not involve lamps used in explosive gas atmospheres and explosive dust atmospheres. Special temperature limits for luminaires that may be covered by combustible dust apply, for example, to places where textile materials are handled or stored, and places where large quantities of paint powder, wood chips, grain dust, flour and textile debris may accumulate, but where There is no risk of explosion.
GB 7000.17-2003 history
2003GB 7000.17-2003 Safety requirements for luminaries with limited surface temperatures