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BS 6423:1983

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Code of practice for maintenance of electrical switchgear and controlgear for voltages up to and including 1 kV
Available format(s)

Hardcopy , PDF

Superseded date

30-11-2014

Language(s)

English

Published date

31-10-1983

Foreword
Committees responsible
Code
Section one. General
0. Introduction
1. Scope
2. Definitions
3. Relevant acts and regulations
Section two. Safety
4. General
5. Responsibility
6. Rules or procedures
7. Emergency exits
8. Fire extinguishing equipment
9. First aid
10. Lighting
11. Instructions, notices and labels
12. Access
13. Isolation before maintenance work
14. Observing and working on live equipment
15. Avoidance of contamination
16. Insulating equipment
17. Earthing equipment
18. Voltage indicators
19. Capacitively stored electrical energy
20. Associated plant
21. Portable electrical tools and lamps
22. Containment of faults
23. Testing
24. Disposal of scrap
Section three. Common recommendations relating to
maintenance
25. Manufacturer's instructions
26. Newly commissioned equipment
27. Frequency of maintenance
28. Records
29. Replacement parts
30. Cleanliness
31. Marking of covers and connections
32. Quality of connections
33. Maintenance of insulation
34. Maintenance of safety earthing continuity
35. Shutters, locking devices, etc.
36. Interlocks
37. Ventilation
38. Equipment heating and lighting
39. Lifting devices
40. Tripping and closing supplies
41. Equipment tools, spares and test instruments
42. Conclusion of maintenance
Section four. Additional recommendations relating to the
maintenance of specific items
43. Busbars and busbar chambers
44. Disconnectors and main circuit switches
45. Circuit breakers
46. Fuses
47. Contactors and contactor relays
48. Overload protective devices
49. Relays
50. Timing devices
51. Protective, measuring and control transformers
52. Instruments including recorders
53. Metallic resistors
54. Capacitors
55. Semiconductors
56. Cable boxes and terminations
57. Control switches including pushbuttons and limit
     switches
58. Liquid starters and controllers
59. Manual controllers
60. Sealed switches
61. Motorized items
62. Indicator devices
63. Batteries
Appendices
A. Guidelines on safe isolation procedures for work
     on systems operating at voltages up to and
     including 1 kV
B. Graphical illustration of some of the terms and
     definitions given in clause 2
C. Example of a maintenance record card
D. Examples of information required from the
     manufacturer/supplier for maintenance of equipment
Table
1. Maintenance operations for circuit breakers

Precautions to secure safety of personnel whilst maintenance is in progress, guidelines for safe isolation procedures, and specific procedures for principal components of equipment.

Committee
PEL/17
DevelopmentNote
Supersedes BS 5405(1976), BS CP1011(1961) and 79/28033 DC (01/2004) Reviewed and confirmed by BSI, November 2007. (10/2007)
DocumentType
Standard
Pages
38
PublisherName
British Standards Institution
Status
Superseded
Supersedes

13/30174947 DC : 0 BS 6867 - MAINTENANCE OF ELECTRICAL SWITCHGEAR AND CONTROLGEAR FOR VOLTAGES ABOVE 36 KV - CODE OF PRACTICE
BS 6867:1987 Code of practice for maintenance of electrical switchgear for voltages above 36 kV
BS 6739:2009 Code of practice for instrumentation in process control systems: installation design and practice
BS 6423:2014 Code of practice for maintenance of low-voltage switchgear and controlgear
BS 6867:2013 Maintenance of electrical switchgear and controlgear for voltages above 36 kV. Code of practice
PD 5304:2005 GUIDANCE ON SAFE USE OF MACHINERY
BS 6626:2010 Maintenance of electrical switchgear and controlgear for voltages above 1 kV and up to and including 36 kV. Code of practice
BS 6626:1985 Code of practice for maintenance of electrical switchgear and controlgear for voltages above l kV and up to and including 36 kV
EEMUA 178 : 2009 ELECTRICAL SAFETY OF INSTRUMENTS, INSTRUMENT CONTROL PANELS AND CONTROL SYSTEMS - DESIGN GUIDE
08/30136724 DC : DRAFT MAY 2008 BS 6739 - CODE OF PRACTICE FOR INSTRUMENTATION IN PROCESS CONTROL SYSTEMS - INSTALLATION DESIGN AND PRACTICE
BS 6739:1986 Code of practice for instrumentation in process control systems: installation design and practice
BS 7354:1990 Code of practice for design of high-voltage open-terminal stations

BS 5420:1977 Specification for degrees of protection of enclosures of switchgear and controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c.
BS 4727-2:GRP06(1985) : 1985 GLOSSARY OF ELECTROTECHNICAL POWER TELECOMMUNICATION ELECTRONICS LIGHTING AND COLOUR TERMS - TERMS PARTICULAR TO POWER ENGINEERING - SWITCHGEAR & CONTROLGEAR TERMINOLOGY INCLUDING FUSE TERMINOLOGY
1973/23/EEC : 1973 COUNCIL DIRECTIVE OF 19 FEBRUARY 1973 ON THE HARMONIZATION OF THE LAWS OF MEMBER STATES RELATING TO ELECTRICAL EQUIPMENT DESIGNED FOR USE WITHIN CERTAIN VOLTAGE LIMITS
BS 5304:1988 Code of practice for safety of machinery
BS 2769:1964 Specification for portable electric motor-operated tools
BS CP1003(1948) : LATEST INSTALLATION & MAINTENANCE OF FLAMEPROOF AND INTRINSICALLY-SAFE ELECTRICAL EQUIPMENT FOR INDUSTRIES OTHER THAN COAL MINING
BS 5486-1:1990 Low-voltage switchgear and controlgear assemblies Requirements for type-tested and partially type-tested assemblies
BS CP1013(1965) : LATEST EARTHING
BS 4941-1:1979 Specification for motor starters for voltages up to and including 1000 V a.c. and 1200 V d.c. Direct-on-line (full voltage) a.c. starters

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