The product scope of the Control Group of the Industrial Control and Systems Section of NEMA which is responsible for the development of this Standards Publication is given below. Scope of the Control Group General purpose mechanical@ electromechanical and/or solid state (static) devices and control which are principally used in industrial applications for the control of motors or other power utilization apparatus rated not more than 750 volts dc or 7@200 volts ac. The product scope specifically includes@ but is not limited to@ devices principally used for the following purposes: A. To start@ stop@ protect@ accelerate@ decelerate@ reverse@ and/or control the?? speed of electric motors. B. To provide some mechanical movement through the action of magnets or solenoids. Examples of devices falling within this product scope are as follows: 1. Manual@ magnetic and solid state (static) starters and controllers. 2. Relays and contactors@ magnetic and solid state (static). 3. Drum switches. 4. Overload devices intended primarily for the starting and running protection of electric motors@ including inherent overload protective devices. 5. Rheostats and resistors. 6. Autotransformers and reactors of the type principally used in reduced voltage starters. 7. Control circuit and/or pilot devices including@ but not limited to@ timers@ push-buttons@ indicating and pilot lights@ limit switches@ pressure@ vacuum@ temperature and/or liquid-level switches@ plugging switches@ speed switches@ solenoids and photo-electric relays. Specifically includes domestic water pump pressure switches. 8. AC and DC brakes@ clutches@ and electrical operators therefor. 9. Resistance dimmers@ autotransformer dimmers@ reactor dimmers@ and solid state (static) dimmer systems. 10. Solid state logic devices. 11. Machine tool and similar machine control panels.
NEMA ICS 2-1978 history
2000NEMA ICS 2-2000 Industrial Control and Systems Controllers, Contactors and Overload Relays Rated 600 Volts (Incorporates Errata: March 2008)
1993NEMA ICS 2-1993 Industrial Control and Systems Controllers@ Contactors@ and Overload Relays Rated Not More Than 2000 Volts AC or 750 Volts DC
1988NEMA ICS 2-1988 Standard for Industrial Control Devices@ Controllers and Assemblies
1983NEMA ICS 2-1983 Standard for Industrial Control Devices@ Controllers and Assemblies (Includes Revision 1: January 1984@ Revision 2: June 1985@ Revision 3: May 1986@ and Revision 4: January 1987)
1978NEMA ICS 2-1978 Standard for Industrial Control Devices@ Controllers and Assemblies