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Standard for Industrial Control Panels

UL Bulletin
Standard 508A, Edition 3 Edition Date: October 18, 2018 $314.00-$391.00
Summary of Topics b0508a_3_20181018_sum.html

Subject 508A

Bulletin Dated: October 18, 2018

SUMMARY OF TOPICS

The following topics were discussed at the meeting of the Standards Technical Panel for Industrial Control Panels, UL 508A:

1. Discussion Item: Informative Appendix B

2. Discussion of the following topic to serve as Preliminary Review: Revision to Par 28.2.5 to remove reference to the old Supplement SA / UL LLC website

3. Discussion Item: Comparison between UL 508A and NFPA 79 - outcomes from the working group

4. Discussion Item: Class 1 circuit description need to change to 1000V

5. Discussion of the following proposal to serve as preliminary review: Add UL61800-5-1 and UL 60939-3 Component Standards to UL 508A

6. Discussion Item: Auxiliary contact on the line or load side

7. Discussion of the following proposal to serve as preliminary review: Sizing Power Supplies Complying with UL 61010-2-201

8. Discussion Item: Update from the SCCR for Equipment Ground Terminals Task Group

9. Discussion of the following proposal to serve as preliminary review: E-Stop in Standard Panels

10. Discussion Item: Cyber security in Industrial Control Standards

11. Discussion of the following proposal: ECBT2 Connectors in Control Circuits

12. Discussion of the following proposal: SCCR for EMI Filters in Panels

13. Discussion of the following proposal: Sizing of Branch Circuit Protection for Heater Loads

14. Discussion of the following proposal: Emergency Stop Devices in Panels

15. Discussion of the following proposal: Wire Positioning Devices in Panels

16. Discussion of the following proposal: Sizing the Feeder: same approach for all Panels

17. Discussion of the following proposal Sizing the Feeder

18. Discussion of the following proposal: SB 4.3.3 - Addition of Class CF

19. Discussion of the following proposal: Revision of 31.4.1(c) to correlate with NEC 430.53(C)(1)

20. Discussion of the following proposal: Bus Bar Construction Requirements for 100kA SCCR without testing

21. Discussion of the following proposal: Color Coding

22. Discussion of the following proposal to serve as preliminary review: Reference to Table 28.1 and/or 38.1

23. Discussion of the following proposal to serve as preliminary review: Update requirements for 1000v

24. Discussion of the following proposal to serve as preliminary review: Revise spacing requirements applicable to the receptacles, attachment plugs, and inlets

25. Discussion of the following proposal to serve as preliminary review: Revision to 30.1.8 for fused disconnect switches

26. Discussion of the following proposal to serve as preliminary review: Revised definition for low-voltage limited energy circuit

27. New Business: Discussion: Spacings at component terminals

28. New Business: Discussion of proposal: Article 29.1.3 conductor identification requirements

29. New Business: SB4.2 Short circuit current ratings- exception for enclosure Air-Conditioners, remove the cord and attachment plug connection

30. New Business: Static control wiring definition

31. New Business: Discussion of proposal: exception for Enclosure Air Conditioners 26.3.1

32. New Business: Use of male-type receptacles in panels

33. New Business: Nameplate location

34. New Business: Circuit breaker handle position

35. New Business: Scope of 508A- Marshalling panel

36. New Business: Short circuit ratings

37. New Business: Back fed devices

38. New Business: 508A Panels

Back to Standard 508A, Edition 3

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