NVIC 09-84: Electrical installations in agricultural dust locations

DEPARTMENT OF TRANSPORTATION UNITED STATES COAST GUARD U.S. Coast Guard (G-MTH-2) Washington, D.C. 20593 Phone: (202) 426-22O6 NVIC 9-8 4 4 OCT 1984 NAVIGATION AND VESSEL INSPECTION CIRCULAR NO. 9-84 Subj: Electrical Installations in Agricultural Dust Locations Ref: (a) "National Electrical Code," NFPA 70 - 1984 (b) "Classification of Dusts Relative to Electrical Equipment in Class II Hazardous Locations," National Materials Advisory Board Report, NMAB 353-4 of July 1982 (c) "Area Classification in Hazardous Dusts Locations," Instrument Society of America Standard 12.10 (d) "Classification of Gases, Vapors, and Dusts for Electrical Equipment in Hazardous Locations," NEPA 497M - 1983

Electrical Installations in Agricultural Dust Locations — PURPOSE. The purpose of this Circular is to provide guidance for classifying hazardous locations

caused by agricultural dusts and also to provide guidance for the design, installation, and inspection of electrical equipment and systems in such locations.

Electrical Installations in Agricultural Dust Locations — BACKGROUND. There has been an increase in requests for the endorsement of Certificates of

Inspection (COIs) for the carriage of agricultural products. Many of these requests concern vessels whose COI's are already endorsed to carry coal or a specific grain and usually inquire about the requirements for endorsement of the COI to allow the carriage or addition of agricultural products.

Electrical Installations in Agricultural Dust Locations — DISCUSSION. Enclosure (1) is a guide for safe electrical installations on vessels carrying

agricultural products. It is intended to provide uniform guidelines for the endorsement of the vessel's COI for carrying agricultural products.

Electrical Installations in Agricultural Dust Locations — ACTION. Coast Guard marine inspection personnel, shipbuilders, designers, and operators are

encouraged to use the recommended design, installation, and inspection guidelines in enclosure (1) when considering the carriage of agricultural products. Additional information on this topic is available in References (a), (b), (c), and (d). End: (1) Guide for Electrical Installations in Agricultural Dust Locations NAVIGATION AND VESSEL INSPECTION CIRCULAR NO. 9-84 Non-Standard Distribution: C:e Baltimore (45); Alameda (40); Port Arthur, Honolulu, Puget Sound (35); Miami, Mobile, Long Beach (25); Norfolk, Jacksonville, Portland OR (20); Boston, Portland ME, Charleston, Anchorage (15); Cleveland (12); Cincinnati, Louisville, Memphis, Nashville, Paducah, Pittsburgh, St. Louis, Savannah, San Juan, Tampa, Galveston, Buffalo, Chicago, Detroit, Duluth, Milwaukee, San Diego, Juneau, Valdez (10); Providence, Huntington, Wilmington, Corpus Christi, Toledo (5). C:m New Orleans (140); New York (70); Philadelphia (35); Houston (25); St. Ignace (5); Sturgeon Bay (4). D:l CG Liaison Officer NILSEALIFTCOMD M-65 STRAT MOB, Liaison Officer JUSNAGPHIL (1). ZTC-68