Text For Citation: 01 Item/Group: 005 Hazard:

29 CFR 1910.303(b)(7)(iii):29 CFR 1910.303(b)(7)(iii): Internal parts of electrical equipment, including busbars, wiring terminals, insulators, and other surfaces, were damaged or contaminated by foreign materials such as paint, plaster, cleaners, abrasives, or corrosive residues: Base Web Deck Area: On or about August 09, 2022, the internal parts of electrical equipment in Base Web were exposed to damage or contamination from combustible dust that migrated into interior structures that were not dusttight during the following instances: a) Class I Division 2 Weg W22 NEMA Inverter Duty Motors that energized Y-Tron 1 and Y-Tron 2 Hoppers were not dusttight in a manner that excluded dust from its internal parts. b) Dust accumulated on a transient voltage surge suppressor receptacle near the Y-Tron 2 hopper, allowing its internal parts to become contaminated with combustible dust. A 120 V industrial fan and a flexible cord connected to a 120 V portable vacuum were both plugged into this receptacle. c) Dust accumulated inside the wiring terminals of a partly enclosed receptacle connected to the transient voltage surge suppressor near the Y-Tron 2 hopper. d) Dust accumulated inside the wiring terminals of a partly enclosed receptacle mounted on top of the Cowles Tank 1 Control Panel. e) Control panels for Y-Tron hoppers and Celatom Mix Tank transfers were not dusttight. This allowed combustible dust to accumulate on the surface of the panel and migrate into its internal parts.