Contains practical information on performance, safety, test, construction, and manufacture of alternating-current and direct-current motors and generators. Some definite-purpose motors and generators are included, but the requirements do not apply to machines such as generators and traction motors for railroads, motors for mining locomotives, arc-welding generators, automotive accessory and toy motors and generators, machines mounted on aircraft, etc. This revision provides users with additional information that can be added to nameplates of all sizes of machines. For large machines, code letters for kVA have been added, as has information on temperature rise for induction machines operated in ambients greater than 40oC. There is a new information on standard and high torques for large machines, load Wk2, and a low-voltage option for starting large machines. Many smaller revisions also were made to improve the quality and usefulness of the standard.