Reprinted with permission from “IAEI News” by the International Association of Electrical Inspectors (IAEI). Copyright © 1929 to 2020 by the International Association of Electrical Inspectors. Current articles may be found online at https://www.iaeimagazine.org.
The IAEI March 1932 issue had quite a few great articles including:
Grounding (Page 27) Water Pipe Ground where the secondary is grounded at water pipe at two or more locations outside building served and more.
Portable Light Causes Explosion in Flour Mill (Page 33) Story of a dust explosion of a flour mill when a light bulb broke.
Hazardous Locations Classifications (Page 35) A diagrammatical analysis of the requirements of Article 32 from 1932 regarding classified locations.