A Metric Motor in Your Future (?)

Concurrent with the enactment of metric conversion legislation by the U. S. Congress in 1975, the Motor and Generator Section of the National Electrical Manufacturer Association (NEMA) voted to proceed with the development of a Guide for the Development of Metric Standards for Motors and Generators, referred to as the " IMetric Guide" or "the Guide." The first edition was published in 1978, followed by a second, more extensive, edition in November 1980. A summary of the Metric Guide, is given, including comparison with NEMA and International Electrotechnical Commission (IEC) standards.