UL 508A - Starsplas

1 Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. UL 508A. Industrial Control Panels UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. JANUARY 13, 2014 UL 508A tr1. UL Standard for Safety for Industrial Control Panels, UL 508A. Second Edition, Dated December 20, 2013. Summary of Topics Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. This revision of UL 508A is issued to correct Table to remove the reference for Multiwire (power distribution) lug, which did not reach consensus during the proposal process.

2 Text that has been changed in any manner or impacted by UL's electronic publishing system is marked with a vertical line in the margin. The revised requirements are substantially in accordance with Proposal(s) on this subject dated December 2, 2011 and January 11, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or fitness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage.

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4 The following table lists the future effective dates with the corresponding reference. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. tr2 JANUARY 13, 2014 UL 508A. Future Effective Date References December 20, 2014 Entire Standard Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. DECEMBER 20, 2013. (Title Page Reprinted: January 13, 2014). 1. UL 508A. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. Standard for Industrial Control Panels First Edition April, 2001. Second Edition December 20, 2013. This UL Standard for Safety consists of the Second Edition including revisions through January 13, 2014.

5 Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in UL's On- line Collaborative Standards Development System (CSDS). at UL's Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of UL's Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. 2 INDUSTRIAL CONTROL PANELS - UL 508A DECEMBER 25, 2013. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. No Text on This Page UL COPYRIGHTED MATERIAL.

6 NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. DECEMBER 25, 2013 INDUSTRIAL CONTROL PANELS - UL 508A 3. CONTENTS. PART 1 GENERAL USE INDUSTRIAL CONTROL PANELS. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. INTRODUCTION. 1 Scope ..10. 2 Glossary ..12. 3 Undated References ..15. 4 Components ..15. 5 Units of Measurement ..16. 6 Terminology ..16. CONSTRUCTION. ALL PANELS. 7 General ..19. 8 Protection Against Corrosion ..19. 9 Support and Securement of Live Parts ..19. 10 Spacings ..20. 11 Conduit Bushings ..22. 12 Insulating Barriers ..23. 13 Insulating Materials ..24. 14 Grounding General ..25. 15 Grounding Size of Terminal or Bonding Conductor ..26. 16 Transformer and Power Supply Secondary Grounding ..27. 17 Identification of Grounding and Grounded Circuit Conductors and Terminals.

7 28. ENCLOSED PANELS. 18 Enclosures ..29. 19 Enclosure Openings ..30. 20 Accessibility of Live Parts ..32. 21 Ventilation Openings ..33. General ..33. Location of ventilation opening ..34. Construction ..34. 22 Barriers Used with Ventilation Openings ..35. 23 Observation Windows ..36. 24 Bonding ..36. 25 Wire Bending Space ..37. 26 Enclosure Environmental Control Devices ..38. General ..38. Enclosure fans ..38. Enclosure air conditioner ..39. Enclosure heater ..39. Air filters ..39. Enclosure thermal insulation ..40. 27 Enclosure Maintenance Lighting ..40. General ..40. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. 4 INDUSTRIAL CONTROL PANELS - UL 508A DECEMBER 25, 2013. Component requirements ..40. Circuit requirements ..40. POWER CIRCUITS. 28 Field Wiring ..41. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM.

8 General ..41. Component requirements ..41. Sizing ..42. Separation of circuits ..44. Cord-connected equipment ..45. Receptacles ..47. 29 Internal Wiring ..48. General ..48. Conductor requirements ..48. Wiring methods ..49. Routing of internal wiring ..51. Separation of circuits ..51. Sizing ..52. 30 Disconnect Switches ..52. Component requirements ..52. Sizing of disconnect switch ..53. Location ..54. Mechanical operating mechanism ..55. 31 Branch Circuit Protection ..55. Component requirements ..55. Location ..56. Sizing of branch circuit protection for single motor circuit ..57. Sizing of branch circuit protection for motor groups ..59. Receptacles ..61. Sizing of branch circuit protection for heater loads ..61. Sizing of branch circuit protection for appliance loads ..62. Sizing of branch circuit protection for lighting loads.

9 62. 32 Overcurrent Protection of Feeder ..63. Component requirements ..63. Location ..63. Sizing of overcurrent protection ..63. 33 Load Controllers ..63. Component requirements ..63. Sizing/rating of load controllers ..64. Location ..65. Reversing motor controllers ..65. Wye-delta motor controllers ..65. Controllers for multi-speed and part winding motors ..68. Autotransformer- and resistor-type reduced voltage motor controllers ..68. 34 Overload Protection of Motor Loads ..68. Component requirements ..68. Sizing of overload relay ..68. Location ..69. 35 Power Transformers ..70. Component requirements ..70. Sizing of overcurrent protection for power transformer ..70. Location ..72. UL COPYRIGHTED MATERIAL . NOT AUTHORIZED FOR FURTHER REPRODUCTION OR. DISTRIBUTION WITHOUT PERMISSION FROM UL. DECEMBER 25, 2013 INDUSTRIAL CONTROL PANELS - UL 508A 5.

10 36 Other Circuit Components ..72. Capacitors ..72. Resistors ..73. Surge control devices ..73. CONTROL CIRCUITS. Document Was Downloaded By Paul Kowalsky For Use By ROCKWELL AUTOMATION 19216 : 1/21/2014 - 5:11 PM. 37 Field Wiring Terminals ..74. Component requirements ..74. Sizing ..74. Field wiring terminals of a low-voltage limited energy circuit ..75. Field wiring terminals of Class 2 circuits ..75. Separation of circuits ..75. Receptacles ..75. Flexible cords ..75. 38 Internal Wiring ..76. Component requirements ..76. Sizing of internal control circuit conductors ..76. Wiring methods, wire routing, and separation of circuits for internal wiring of a control circuit ..77. 39 Disconnecting Means ..77. 40 Overcurrent Protection ..77. Component requirements ..77. Location of overcurrent protective devices ..77. Sizing of overcurrent protection.