At 1910.106(e)(6)(ii), OSHA says only that “Category 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100 °F (37.8 °C), shall not be dispensed into containers unless the nozzle and container are electrically interconnected.” As such, flammable liquid storage cabinets do not need to be grounded under the OSHA standard.
However, published materials from OSHA’s Hazardous Materials course (Course 201), indicate that the requirement to ground flammable storage cabinets is found in NFPA 77, “Recommended Practice on Static Electricity.” If NFPA 77 has been adopted by an employer’s state or local fire code, then compliance with this grounding requirement would be necessary.
