FPN: Rules that are followed by a reference in brackets contain text that has been extracted from NFPA 30A-
2008, Code for Motor Fuel Dispensing Facilities and Repair Garages. Only editorial changes were made to the extracted text to make it consistent with this Code.
511.1 Scope. These occupancies shall include locations used for service and repair operations in connection with self- propelled vehicles (including, but not limited to, passenger automobiles, buses, trucks, and tractors) in which volatile flammable liquids or flammable gases are used for fuel or power.
511.2 Definitions.
Major Repair Garage. A building or portions of a building where major repairs, such as engine overhauls, painting, body and fender work, and repairs that require draining of the motor vehicle fuel tank are performed on motor vehicles, including associated floor space used for offices, parking, or showrooms. [30A:3.3.12.11
Minor Repair Garage. A building or portions of a building used for lubrication, inspection, and minor automotive maintenance work, such as engine tune-ups, replacement of parts, fluid changes (e.g., oil, antifreeze, transmission fluid, brake fluid, air- conditioning refrigerants), brake system repairs, tire rotation, and similar routine maintenance work, including associated floor space used for offices, parking, or showrooms. [30A:3.3.12.2]
511.3 Area Classification, General. Where Class I liquids or gaseous fuels are stored, handled, or transferred, electri cal wiring and electrical utilization equipment shall be de signed in accordance with the requirements for Class I, Division 1 or 2 hazardous (classified) locations as classified in accordance with 500.5 and 500.6, and this article. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition that has no openings. [30A:8.3.5, 8.3.2]
(A) Parking Garages. Parking garages used for parking or storage shall be permitted to be unclassified.
FPN: For further information, see NFPA 88A-2007, Standard for Parking Structures, and NFPA 30A-2008, Code for Motor Fuel Dispensing Facilities and Repair Garages.
(B) Repair Garages, With Dispensing. Major and minor repair garages that dispense motor fuels into the fuel tanks of vehicles, including flammable liquids having a flash point
below 38°C (100°F) such as gasoline, or gaseous fuels such as natural gas, hydrogen, or LPG, shall have the dispensing functions and components classified in accordance with Table
514.3(B)(1) in addition to any classification required by this
section. Where Class I liquids, other than fuels, are dispensed,
the area within 900 mm (3 ft) of any fill or dispensing point,
extending in all directions, shall be a Class I, Division 2
location.
(C) Major Repair Garages. Where flammable liquids having a flash point below 38°C (100°F) such as gasoline, or gaseous fuels such as natural gas, hydrogen, or LPG, will not be dispensed, but repair activities that involve the transfer of such fluids or gases are performed, the classification rules in (1), (2), and (3) shall apply.
(1) Floor Areas.
(a) Ventilation Provided. The floor area shall be unclassified where there is mechanical ventilation providing a minimum of four air changes per hour or one cubic foot per minute of exchanged air for each square foot of floor area. Ventilation shall provide