Historical
NEMA ICS 3.1:1997 (R2003)
Handling, Storage, And Installation Guide For Ac General-Purpose Medium Voltage Contactors And Class E Controllers, 50 And 60 Hertz
Contains practical information for architects, electrical engineers, contractors and maintenance personnel on the handling, storage and installation of ac general-purpose medium-voltage contactors and class E controllers.
NEMA: National Electrical Manufacturers Association [nema]