NFPA 70B:2023

Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Equivalency.
1.5 Units of Measurement.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications. (Reserved)
2.3 Other Publications.
2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.
Chapter 4 General
4.1 General Requirements.
4.2 Electrical Maintenance Program (EMP).
4.3 Personnel.
4.4 Survey and Analysis.
4.5 Planned Inspections.
4.6 Acceptance Test Report.
4.7 Impact of Additions/Rework to Retrofitting Equipment.
4.8 Equipment Cleaning.
Chapter 5 Personnel Safety
5.1 Introduction.
Chapter 6 Single-Line Diagrams and System Studies
6.1 Introduction.
6.2 Single-Line Diagrams.
6.3 Short-Circuit Studies.
6.4 Coordination Studies.
6.5 Load-Flow Studies.
6.6 Reliability Studies.
6.7 Incident Energy Analysis (Arc-Flash Study).
6.8 Electrical Maintenance-Related Design.
Chapter 7 Fundamental Tests
7.1 Fundamental Tests.
7.2 Bolted Bus Connections, Conductor Terminations, and Conductor Connectors.
7.3 Insulation Resistance Quality.
7.4 Infrared Thermography.
Chapter 8 Field Testing and Test Methods
8.1 Introduction.
8.2 Risk Assessment Special Considerations.
8.3 Testing Category Types.
8.4 Qualifications of Testing Personnel.
8.5 Test Equipment and Tools.
8.6 Test Record.
8.7 Condition of Maintenance Indication.
Chapter 9 Maintenance Intervals
9.1 Scope.
9.2 Frequency of Maintenance.
9.3 Equipment Condition Assessment.
Chapter 10 Hazardous (Classified) Location Electrical Equipment
10.1 General.
10.2 Maintenance Personnel for Hazardous (Classified) Locations.
10.3 Elimination of Hazardous Atmospheres.
10.4 Elimination of Ignition Sources.
10.5 Equipment Reassembly.
10.6 Conduit and Equipment Seals.
10.7 Bolts and Screws.
10.8 Handling of Equipment, Components, and Tools.
10.9 Field Modifications.
Chapter 11 Power and Distribution Transformers
11.1 Scope.
11.2 Frequency of Maintenance.
11.3 Periodic Maintenance Procedures.
Chapter 12 Substations and Switchgear
12.1 Scope.
12.2 Frequency of Maintenance.
12.3 Periodic Maintenance Procedures.
Chapter 13 Panelboards and Switchboards
13.1 Scope.
13.2 Frequency of Maintenance.
13.3 Periodic Maintenance Procedures.
Chapter 14 Busways
14.1 Scope.
14.2 Frequency of Maintenance.
14.3 Periodic Maintenance Procedures.
Chapter 15 Circuit Breakers, Low- and Medium-Voltage
15.1 Scope.
15.2 Frequency of Maintenance.
15.3 Periodic Maintenance Procedures for Low-Voltage Power Circuit (LVPCB), Molded Case Circuit Breaker (MCCB), and Insulated Case Circuit Breakers (ICCB).
15.4 Periodic Maintenance Procedures for Medium-Voltage Power Circuit Breakers.
Chapter 16 Fuses
16.1 Scope.
16.2 Frequency of Maintenance.
16.3 Periodic Maintenance Procedures.
Chapter 17 Switches
17.1 Scope.
17.2 Frequency of Maintenance.
17.3 Periodic Maintenance Procedures.
Chapter 18 Power Cables and Conductors
18.1 Chapter Scope.
18.2 Frequency of Maintenance.
18.3 Periodic Maintenance Procedures.
Chapter 19 Cable Tray
19.1 Scope.
19.2 Frequency of Maintenance.
19.3 Periodic Maintenance Procedures.
Chapter 20 Grounding and Bonding
20.1 Scope.
20.2 Frequency of Maintenance.
20.3 Periodic Maintenance Procedures.
Chapter 21 Ground-Fault Circuit Interrupters and Ground-Fault Protection of Equipment Systems
21.1 Scope.
21.2 Frequency of Maintenance.
21.3 Periodic Maintenance Procedures.
Chapter 22 Lighting
22.1 Scope.
22.2 Frequency of Maintenance.
22.3 Periodic Maintenance Procedures.
Chapter 23 Lighting Control Systems (Reserved)
Chapter 24 Wiring Devices
24.1 Scope.
24.2 Frequency of Maintenance.
24.3 Periodic Maintenance Procedures.
Chapter 25 Uninterruptible Power Supplies (UPS)
25.1 Scope.
25.2 Frequency of Maintenance.
25.3 Periodic Maintenance Procedures.
25.4 Special Procedures.
Chapter 26 Electronic Equipment (Reserved)
Chapter 27 Rotating Equipment
27.1 Scope.
27.2 Frequency of Maintenance.
27.3 Periodic Maintenance Procedures.
Chapter 28 Motor Control Equipment
28.1 Scope.
28.2 Frequency of Maintenance.
28.3 Periodic Maintenance Procedures.
Chapter 29 Portable Electrical Tools and Equipment
29.1 Scope.
29.2 Frequency of Maintenance.
29.3 Periodic Maintenance Procedures.
Chapter 30 Photovoltaic Systems
30.1 Scope.
30.2 Frequency of Maintenance.
30.3 Documentation and Labeling.
30.4 Periodic Maintenance Procedures.
Chapter 31 Wind Power Electric Systems and Associated Equipment
31.1 Scope.
31.2 Frequency of Maintenance.
31.3 Periodic Maintenance Procedures.
Chapter 32 Battery Energy Storage Systems
32.1 Scope.
32.2 Frequency of Maintenance.
32.3 Documentation.
32.4 Periodic Maintenance Procedures.
Chapter 33 Electric Vehicle Power Transfer Systems and Associated Equipment
33.1 Scope.
33.2 Frequency of Maintenance.
33.3 Documentation.
33.4 Periodic Maintenance Procedures.
Chapter 34 Public Pools, Fountains, and Similar Installations
34.1 Scope.
34.2 Frequency of Maintenance.
34.3 Periodic Maintenance Procedures.
Chapter 35 Protective Relays
35.1 Scope.
35.2 Frequency of Maintenance.
35.3 Periodic Maintenance Procedures.
Chapter 36 Stationary Standby Batteries
36.1 Scope.
36.2 Frequency of Maintenance.
36.3 Documentation.
36.4 Periodic Maintenance Procedures.
36.5 Special. (Reserved)
Chapter 37 Instrument Transformers (Reserved)
Chapter 38 Control Power Transformers (Reserved)
Annex A Explanatory Material
Annex B Suggestions for Inclusion in a Walk-Through Inspection Checklist
Annex C Symbols
Annex D Diagrams
Annex E Forms
Annex F NEMA Configurations
Annex G Primary Contact Matrix
Annex H Equipment Storage and Maintenance During Construction
Annex I Reliability Centered Maintenance
Annex J Power Quality
Annex K Electrical Disaster Recovery
Annex L Case Histories
Annex M Informational References

This standard covers the preventive maintenance of electrical, electronic, and communications systems and equipment.