Most readers of Plant Engineering magazine are familiar with electric motors made to National Electrical Manufacturers Association (NEMA) standards as commonly used in the U.S., Canada, Mexico, some parts of South America and Saudi Arabia. But nearly 70% of the industrial motors sold worldwide are made to International Electrotechnical Commission (IEC) standards. Motor standards for these motors are MG 1 for NEMA and the 60034 series and 60071 for IEC that define mechanical, electrical, and performance specifications.
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