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Understanding Motor Nameplate Information - NEMA v/s IEC Standards

A. Bhatia, B.E.

Course Outline

If you specify, buy, maintain, or replace motors, you should know how to read and interpret the motor nameplate information.

This 2-hour course is provides a brief overview of how to read and interpret National Electric Manufacturers Association (NEMA) and IEC motor nameplates.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

Learning Objective

At the conclusion of this course, the student will be aware of:

Intended Audience

This course is aimed at students, professional engineers, service technicians, energy auditors, operational & maintenance personnel, sales & marketing personnel, and general audience.

Course Introduction

One of the most important aspects of making motors interchangeable is ensuring that nameplate information is common among manufacturers. International standards such as NEMA and IEC provide key electrical, mechanical, construction and reliability parameters on the motor largely to benefit consumer to expect "standard" motors from different manufacturers that meets or exceeds the minimum performance parameters and, for the most part, be about the same size.

The course reviews the above criteria in detail and is followed by course summary and multiple - choice quiz at the end.

Course Content

The course content is in a PDF file Understanding Motor Nameplate Information - NEMA v/s IEC Standards. You need to open or download this document to study this course.

Course Summary

As the markets continue to become more global, the common language of the motor nameplate shall enable the electrical engineers/technicians to quickly understand and recognize exactly what type of motor they're dealing with during a new selection, installation or replacement procedure.

While NEMA standards are for the North America markets, the rest of the world follows the IEC standards. Selecting and replacing motors become a lot easier when you can quickly recognize the key items that describe a motor's size, speed, voltage, physical dimensions, and performance characteristics. All of this information and more is usually available on the motor's nameplate Verifying conformance of NEMA to IEC or other industry standards would enable you to apply motors correctly anywhere in the project site.


Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.

Take a Quiz

DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDH Center or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered architect and/or professional engineer/surveyor. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.