(id:107457) Area classification for the area inside any tank or container within the scope of the article addressing spray application , dipping, coating, and printing processes using flammable or combustible materials in open containers that contain Class I liquids that are located in ventilated areas shall be classified as Class I, Division 1 or Class I Zone 0. whichever is __ a. applicable b. approved c. more protective d. used Partial credit allowed Help Videos for NEC Reference square