IAEI News – January, 1932 – Vol. IV No. 1

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.