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Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

EASA Technical Manual

  • May 2026
  • Number of views: 42416
  • Article rating: .8
FREE for Members of EASA

Revised May 2026!
EASA's most comprehensive technical document is available FREE to EASA members. Download the complete manual or just the sections you're interested in.

IEC to NEMA Motor Ratings

  • February 2025
  • Number of views: 7729
  • Article rating: No rating

The information in this article provides comparisons of key characteristics of IEC and NEMA motors to aid in evaluating the potential simplicity or complexity of the IEC to NEMA design conversion.

Clasificaciones IEC a NEMA

  • February 2025
  • Number of views: 5303
  • Article rating: No rating

La información de este artículo proporciona comparaciones de las características clave de los motores IEC y NEMA para ayudar a evaluar la posible simplicidad o complejidad de la conversión de diseño IEC a NEMA.

A Simple Approach to Duty Ratings of AC Machines

  • August 2021
  • Number of views: 11219
  • Article rating: No rating

When we consider putting a machine into service, we must consider the duty rating of the machine. If we do not, there is a good chance that the machine being placed into service will have thermal degradation of the windings. Not every application is created equal.

Un EnfoqueSencillo para los Tipos de Servicio de las Máquinas CA

  • August 2021
  • Number of views: 14705
  • Article rating: No rating

Cuando consideremos la puesta en servicio de una máquina, debemos tener en cuenta su tipo de servicio. Si no lo hacemos, es muy probable que la máquina sufra una degradación térmica de los devanados. Sin embargo, no todas las aplicaciones son iguales. 

Working with the No Nameplate Motor

  • November 2020
  • Number of views: 12009
  • Article rating: 4.5

Customers sometimes send in a motor with no nameplate, or an illegible nameplate, having little knowledge of the machine’s ratings. This article will explore the process of evaluating the machine using frame size, winding data and test data to assign reasonable ratings.

Working with the No Nameplate Motor

  • September 2020
  • Number of views: 12287
  • Article rating: 2.8
FREE for Members of EASA

Customers will often send in a motor with no nameplate and having little knowledge of the machine’s ratings. This webinar guides attendees through the process of evaluating the machine using core size, winding data and diagnostic testing to assign reasonable ratings.

Principles of Medium & Large AC Motors, 1st Edition - IEC

  • February 2020
  • Number of views: 68844
  • Article rating: .6

This manual covers horizontal and vertical squirrel-cage induction motors in the 300 to 5,000 horsepower range, low- and medium-voltage. Most of the principles covered apply to other sizes as well. This manual focuses primarily on IEC motors and standards.

Principios de Motores C.A. Medianos y Grandes - NEMA

  • February 2019
  • Number of views: 22452
  • Article rating: 4.4

Las versiones impresas y en forma de descarga del valioso manual didáctico / recurso de EASA, “Principios de Motores C.A. Medianos y Grandes”, se  ahora disponibles en inglés y en español. El manual incluye gráficos e ilustraciones, fotografías y mucha información técnica sobre máquinas C.A., incluyendo como funcionan, información específica sobre los tipos de encerramientos, fabricación de componentes y aplicaciones.  Muchos de los principios incluidos en el libro aplican a todos los motores C.A., especialmente a aquellos accesorios que fueron asociados en el pasado con las máquinas más grandes (como encoders, RTDs, termostatos, calentadores de espacio, sensores de vibración, etc.).

What’s in a nameplate?

Information helps the selection of the right motor regardless of application

  • November 2018
  • Number of views: 18327
  • Article rating: 1.3

Whether you're selecting a motor for a new application or a replacement for one that has failed, you need a reliable way to match the capabilities and performance characteristics of various motors with the requirements of the application.

EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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