Subject 6944 (508, 60947-1, 60947-4-1, 60947-4-2)

Bulletin Dated: June 15, 2015

SUMMARY OF TOPICS

The following topics were discussed at the meeting of the Standards Technical Panel for Contactors and Motor-Starters:

1. Update on the Standard for Industrial Control Equipment, UL 508

2. Update on the Standard for Low-Voltage Switchgear and Controlgear - Part 1: General Rules, UL 60947-1

3. Update on the Standard for Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and Motor-Starters - Electromechanical Contactors and Motor-Starters, UL 60947-4-1

4. Update on the Standard for Low-Voltage Switchgear and Controlgear - Part 4-2: Contactors and Motor-Starters - AC Semiconductor Motor Controllers and Starters, UL 60947-4-2

5. Clarification of the insulating material requirement in 15.1 of UL 508

6. Revision to the ground fuse requirements in UL 508

7. Update from the Semi-Conductor Fuse Task Group

8. Update from the Short Circuit Testing of Non-Motor Rated Power Devices Under UL 508 Task Group

9. Revisions to terminal spacing requirements in UL 60947-1

10. Revision to secondary circuit requirements in UL 508 and UL 60947-1

11. Discussion of circuit calibration requirements

12. Corrections and revisions to UL 60947-4-1

13. Update on CSA Group standards