Would anyone know where I can find information on the location of a control panel enclosure for a class I Div 2 area. I know there is some blurb about an 18" rule, where anything located above 18" is considered a non-classified area if the vapors are heavier than air. I'd like to keep the panel on a the piece of equipment we're that's there without having to locate it in a non-classified area. Any help would be great. Mike
