NEMA ICS 2-1996, Part 8 (R2004, R2009)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INDUSTRIAL CONTROL AND SYSTEMS CONTROLLERS, CONTACTORS, AND OVERLOAD RELAYS RATED NOT MORE THAN 2000 VOLTS AC OR 750 VOLTS DC- PART 8: DISCONNECT DEVICES FOR USE IN INDUSTRIAL CONTROL EQUIPMENT
05-01-2015
12-06-2012
1 GENERAL
1.1 Scope
1.2 Application Basis
1.3 Normative References
2 DEFINITIONS
3 CLASSIFICATIONS
4 CHARACTERISTICS AND RATINGS
4.1 Circuit Breaker Ratings
4.2 Molded-Case Switch Ratings
4.3 Motor-Circuit Switch Ratings
4.3.1 Horsepower Ratings
4.3.2 Short-Circuit Withstand Rating
4.4 Rated Insulation Voltage
5 PRODUCT MARKING, INSTALLATION, AND MAINTENANCE INFORMATION
5.1 Marking
5.1.1 Shown on Device Nameplate, or Label Attached to
the Motor-Circuit Switch
5.1.2 Shown on Nameplate of, Label Attached to, or
Instruction Material Packaged with, the
Motor-Circuit Switch
5.2 Exception
5.3 Other Disconnect Devices for Motor Service
5.4 Marking Limitations
5.5 Operating Handles Sold Separately
6 SERVICE AND STORAGE CONDITIONS
7 CONSTRUCTION
7.1 Clearances and Creepage Distances
7.2 Minimum Air Gap in Open Position
7.3 Mechanical Design of Operating Handle and Mechanism
7.4 External Operating Handles for Disconnect Devices
7.5 Status Indication
7.6 Operating Mechanism for Disconnect Devices
7.7 Mechanical Interlock with Door(S)
7.8 Padlocking Provisions
7.9 Additional Construction Requirements for Disconnect
Devices
7.10 Fuse Mounting
8 PERFORMANCE AND TEST
8.1 Circuit-Breaker and Molded-Case Switch Type Tests
8.2 Motor-Circuit Switch Type Tests
8.3 Verification of the Strength of External Operating Handle,
Mechanism, and Position Indicating Device
9 APPLICATION
9.1 Application of Circuit Breakers
9.2 Protection of Nonfused Motor-Circuit Switches
9.3 Safety Procedure for Verifying Deenergized Condition
9.3.1 Verify that Equipment Cannot be Restarted
9.3.2 Verify that Circuit and Equipment are Deenergized
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.