Name: NEMA ICS 2.4 : 2003(R2012)
Brand: NEMA

NEMA ICS 2.4 : 2003(R2012)

Superseded

View Superseded by

INDUSTRIAL CONTROL AND SYSTEMS: NEMA AND IEC DEVICES FOR MOTOR SERVICE - A GUIDE FOR UNDERSTANDING THE DIFFERENCES

Superseded date

01-19-2021

Published date

12-06-2012

Publisher

National Electrical Manufacturers Association

Foreword
Section 1 GENERAL
  1.1 Referenced Standards
      1.1.1 Scope
  1.2 Markings
      1.2.1 Nameplate Markings
      1.2.2 UL Markings
  1.3 References
  1.4 Conventions
  1.5 Design Philosophies
      1.5.1 Traditional NEMA Contractors
      1.5.2 Traditional IEC Contractors
      1.5.3 NEMA Thermal Overload Relays
      1.5.4 IEC thermal Overload Relays
      1.5.5 NEMA Motor Controllers
      1.5.6 IEC Motor Controllers
Section 2 SELECTION CONSIDERATIONS
  2.1 Utilization Categories
  2.2 Contractor Electrical Life
      2.2.1 Electrical Life Test Parameters
      2.2.2 How to Use Electrical Life Curves
  2.3 Mixed Operation Life for Contractors Using
      IEC Procedure
  2.4 How to Use Contractor Ratings
  2.5 Environmental Factors
Section 3 TERMINAL MARKING AND WIRING CONVENTIONS
  3.1 General
  3.2 North American Convention
4 COMPARISONS
  4.1 Physical Characteristics
  4.2 Electrical Life
  4.3 Overcurrent Protection
      4.3.1 Overload Relay Class Applications
      4.3.2 Motor Acceleration Time
      4.3.3 Short-Circuit Current Rating
  4.4 Terminal Temperature Rise
  4.5 Construction
Figures
Tables

Specifies different philosophies behind IEC Standards and NEMA Standards. Helps users make sound selection decisions.

DocumentType	Standard
PublisherName	National Electrical Manufacturers Association
Status	Superseded
SupersededBy	NEMA ICS 2.4:2020

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