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.
Inside the January 1932 edition are articles such as:
Four Wire AC Secondary Networks (Page 12) This extensive article explores the growth (1932 perspective) of AC networks, Radial systems, DC networks, network protectors and more.
Hazardous Locations – Groups (Page 37) “It is recognized that various gases and various combinations of dust, possesses varying characteristics.” Using Groups for hazard locations is common but back in 1932, the concept was just being introduced.