BS 6626:1985

Foreword
Committees responsible
Code of practice
Section one. General
0 Introduction
1 Scope
2 Definitions
Section two. Safety
3 Responsibility
4 Rules or procedures for safe systems at work
5 Isolation and access for maintenance
6 Preparation for maintenance work
7 Fire extinguishing equipment
8 Testing
9 Disposal of scrap
Section three. Common recommendations relating to maintenance
10 Manufacturer's instructions
11 Newly commissioned equipment
12 Frequency of maintenance
13 Records
14 Replacement parts
15 Cleanliness
16 Marking of covers and connections
17 Quality of connections
18 Maintenance and testing of insulation
19 Maintenance of safety earthing continuity
20 Shutters, locking devices, etc.
21 Interlocks
22 Ventilation
23 Equipment heating and lighting
24 Lifting devices
25 Tripping and closing supplies
26 Equipment tools, spares and test instruments
27 Conclusion of maintenance
Section four. Additional recommendations relating to the maintenance
of specific items
28 Circuit breakers
29 Switches
30 Disconnectors and earthing switches
31 Busbars and busbar chambers
32 Fuses
33 Contactors
34 Overload protective devices
35 Relays
36 Timing devices
37 Protective, measuring and control transformers
38 Instruments including recorders
39 Metallic resistors
40 Capacitors
41 Semiconductors
42 Cable boxes and terminations
43 Control switches including pushbuttons and limit switches
44 Liquid starters, controllers and resistors
45 Manual controllers
46 Sealed switches
47 Motorized items
48 Indicator devices
49 Batteries
50 Compressed air plant
Appendices
A Graphical illustration of some of the terms and definitions given
  in clause 2
B Recommendations for the content of the switchgear manufacturer's
  handbook
C Example of maintenance record card
D Typical example of safety rules

Procedures for principal components and guidance on replacement parts, precautions to secure safety of personnel and to minimise hazards to plant.