CHAPTER 8 Motors, Generators, and Controls The main developer of motor and generator standards in the United States is the National Electrical Manufacturers Association (NEMA). The primary standard for electric motors in the United States is NEMA MG 1, Motors and Generators. There are several other NEMA documents which supplement MG 1, including: NEMA Standards Publication Condensed MG 1, Information Guide for General Pur- pose Industrial AC Small and Medium Squirrel-Cage Induction Motor Standards NEMA Standards Publication No. MG 2, Safety Standard and Guide for Selection, Installation, and Use of Electric Motors and Generators NEMA Standards Publication No. MG 3, Sound Level Prediction for Installed Rotating Electrical Machines NEMA Standards Publication No. MG 10, Energy Management Guide For Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors