SN 09 - Determining Hazardous (Classified) Locations in Unventilated Pits or Depressions Below Grade in Commercial Garages

Associated Files


This OSH Standards Notice applies the guidance in NEC and OSH general industry standards to unventilated pits and depressions in commercial garages to determine whether they should be classified as Class I, Division 1 or Class I, Division 2 locations.