UL 977:5ED 2012-04-30
Current
The latest, up-to-date edition.
Fused Power-Circuit Devices
Hardcopy
30-04-2012
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FOREWORD
INTRODUCTION
1. Scope
2. Components
3. Units of Measurement
4. References
CONSTRUCTION
5. General
6. Enclosure
7. Ventilation
8. Sheet-Metal Enclosures
9. Doors and Covers
10. Hinges
11. Latches
12. Operating Mechanism
13. Ground Fault Protection
14. Insulating Material
15. Current-Carrying Parts
16. Wiring Terminals
17. Control Circuit
18. Lockout
19. Fusing
20. Spacings
21. Wiring space
22. Disconnecting Means
23. Provision for Grounding
24. Provision for Bonding
PERFORMANCE
25. General
26. Temperature Test
27. Strength of Insulating Base and Support
28. Overvoltage Test
29. Water Spray Test
30. Operation Test
31. Endurance Test
32. 200-Percent Overload
33. Dielectric Voltage-Withstand Test
34. Close-Open Test
35. Dielectric Voltage-Withstand (Repeated) Test
36. Contact Opening Test
37. Dielectric Voltage-Withstand (Repeated) Test
38. Short-Circuit Withstand Test
39. Closing Test
40. Low-Level Dielectric Voltage-Withstand Test
41. Metallic Coating Thickness Test
INSTRUMENTATION AND CALIBRATION OF HIGH-CAPACITY CIRCUITS
42. Galvanometers
43. Circuit Measurement Verification
44. Calibration of Test Circuit
MANUFACTURING AND PRODUCTION TEST
45. Operation
RATINGS
46. Current
47. Voltage
48. Withstand
49. Control Circuit
MARKING
50. Details
INSTALLATION TEST PROCEDURES
51. Details
APPENDIX A
Standards for Components
This revision to ANSI/UL 977 dated October 26, 2020 includes barriers to address inadvertent contact on line side of service disconnect; Section 24A and 50.37
| DevelopmentNote |
NEW CHILD REV 2 2020 IS ADDED
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| DocumentType |
Standard
|
| Pages |
0
|
| ProductNote |
NEW CHILD REV 2 2020 IS ADDED
|
| PublisherName |
Underwriters Laboratories
|
| Status |
Current
|
These requirements cover fused power-circuit devices to be employed in accordance with the National Electrical Code.
| NEMA KS 3:2010 | Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercial and Industrial Applications |
| NEMA KS 1:2013 | Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum) |
| ANSI/NEMA KS 2:2013 | Distribution Equipment Switch Application Guide, A User\'s Reference |
| UL 508A:3ED 2018-04-24 | Industrial Control Panels |
| IEEE 241 : 1990 | ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS |
| UL 857:13ED 2009-03-25 | Busways |
| IEEE 3001.5-2013 | IEEE Recommended Practice for the Application of Power Distribution Apparatus in Industrial and Commercial Power Systems |
| UL 50:13ED 2015-10-16 | Enclosures for Electrical Equipment, Non-Environmental Considerations |
| UL 83:16ED 2017-07-28 | Standard for Thermoplastic-Insulated Wires and Cables |
| UL 746A:6ED 2012-09-06 | Polymeric Materials - Short Term Property Evaluations |
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