I have a small wastewater facility which consists of two rooms, a main area which houses the pumps and wet well and a bathroom. The bathroom is partitioned off from the rest of the facility with the entrance on the exterior of the building. Any personnel wishing to use the bathroom has to leave the main area and walk around the building. The main area is classified Class 1 Div 1 while the bathroom is unclassified. If I have a ducted roof mounted exhaust fan exhausting the main area while a branch duct also exhausts the bathroom, does this now classify the bathroom as a Class 1 Div 1 area? Meaning, if the same exhaust fan exhausts from both a classified and unclassified area, am I linking both areas together via the fan system?
I've tried looking in NFPA 70 Article 500, NFPA 497 and local building codes, but I only find requirements about sealed cable/conduits penetrating Class 1 Div 1 areas and not this particular situation. Any help provided on this is much appreciated.
I've tried looking in NFPA 70 Article 500, NFPA 497 and local building codes, but I only find requirements about sealed cable/conduits penetrating Class 1 Div 1 areas and not this particular situation. Any help provided on this is much appreciated.