NFPA® 70B Recommended Practice for Electrical Equipment Maintenance 2010 Edition

Chapter 1 Administration

1.1 Scope
1.2 Purpose

Chapter 2 Referenced Publications

2.1 General
2.2 NFPA Publications
2.3 Other Publications
2.4 References for Extracts in Recommendations Sections

Chapter 3 Definitions

3.1 General
3.2 NFPA Official Definitions
3.3 General Definitions

Chapter 4 Why an Effective Electrical Preventive Maintenance (EPM) Program Pays Dividends

4.1 Why EPM?
4.2 Value and Benefits of a Properly Administered EPM Program
4.3 EPM and Energy Conservation
4.4 Case Histories

Chapter 5 What Is an Effective Electrical Preventive Maintenance (EPM) Program?

5.1 Introduction
5.2 Essential Elements of an EPM Program
5.3 Planning an EPM Program
5.4 Personnel
5.5 Survey and Analysis
5.6 Programmed Inspections

Chapter 6 Planning and Developing an Electrical Preventive Maintenance (EPM) Program

6.1 Introduction
6.2 Survey of Electrical Installation
6.3 Identification of Critical Equipment
6.4 Establishment of a Systematic Program
6.5 Methods and Procedures
6.6 Maintenance of Imported Electrical Equipment.
6.7 Maintenance of Electrical Equipment for Use in Hazardous (Classified) Locations.
6.8 Outsourcing of Electrical Equipment Maintenance
6.9 Emergency Preparedness and Electrical System and Equipment Restoration (EPnSR)

Chapter 7 Personnel Safety

7.1 Introduction
7.2 Grounding of Equipment to Provide Protection for Electrical Maintenance Personnel

Chapter 8 Fundamentals of Electrical Equipment Maintenance

8.1 Design to Accommodate Maintenance
8.2 Scheduling Maintenance.
8.3 Equipment Safety
8.4 Protective Scheme
8.5 Acceptance Testing.
8.6 Guidelines and Impact of Additions/Rework to Retrofitting Equipment
8.7 Equipment Cleaning
8.8 Special Handling and Disposal Considerations
8.9 Supervisory Control and Data Acquisition (SCADA) Systems
8.10 Lubrication

Chapter 9 System Studies

9.1 Introduction
9.2 Short-Circuit Studies
9.3 Coordination Studies
9.4 Load-Flow Studies
9.5 Reliability Studies

Chapter 10 Power Quality

10.1 Introduction
10.2 Harmonics
10.3 Transients (Surges)
10.4 Voltage Sags and Swells
10.5 Long-Duration Undervoltages and Sustained Voltage Interruptions
10.6 Unbalanced Voltages and Single Phasing
10.7 Symptoms — Grounding
10.8 Noise in Electrical and Electronic Systems
10.9 Interharmonics
10.10 Voltage Fluctuations and Flicker
10.11 Power Quality Audit
10.12 Power Quality References

Chapter 11 Testing and Test Methods

11.1 Introduction
11.2 Acceptance Tests and Maintenance Tests
11.3 As-Found and As-Left Tests
11.4 Frequency of Tests
11.5 Special Precautions and Safety
11.6 Qualifications of Test Operators
11.7 Test Equipment
11.8 Forms
11.9 Insulation Testing
11.10 Low Voltage Circuit Breakers.
11.11 Transformer Tests
11.12 Protective Relays
11.13 Grounding Systems.
11.14 Battery Testing
11.15 Switches
11.16 Medium and High Voltage Circuit Breakers
11.17 Infrared Inspection
11.18 Fuses
11.19 Insulating-Liquid Analysis
11.20 Rotating Machine Testing
11.21 Cables
11.22 Adjustable-Speed Drive Testing
11.23 Switchgear and Switchboard Assemblies
11.24 Surge Arresters
11.25 Power Factor Correction Capacitors
11.26 Emergency Systems

Chapter 12 Maintenance of Electrical Equipment Subject to Long Intervals Between Shutdowns

12.1 Introduction
12.2 General Aspects of Maintaining Medium- and Low-Voltage Distribution Systems
12.3 Utilization
12.4 Process Instrumentation and Control

Chapter 13 Ground-Fault Protection

13.1 Introduction
13.2 Ground-Fault Protective Equipment for Excessive Leakage Currents
13.3 Ground-Fault Protective Equipment to Prevent Damage

Chapter 14 Grounding

14.1 Introduction
14.2 Symptoms and Causes of Inadequate Grounding
14.3 Grounding System Inspection, Testing, and Monitoring
14.4 Solutions to Inadequate Grounding

Chapter 15 Substations and Switchgear Assemblies

15.1 Substations
15.2 Switchgear Assemblies
15.3 Circuit Interrupters
15.4 Air Circuit Breakers
15.5 Vacuum Circuit Breakers
15.6 Oil Circuit Breakers
15.7 Interrupter Switches
15.8 Gas-Insulated Substations and Gas-Insulated Equipment
15.9 Auxiliary Equipment
15.10 Torque Tables

Chapter 16 Motor Control Equipment

16.1 Introduction
16.2 Components and Maintenance of Motor Controls
16.3 Enclosures
16.4 Bus Bar, Wiring, and Terminal Connections
16.5 Disconnects
16.6 Molded Case Breakers
16.7 Fuses
16.8 Contactors
16.9 Motor Overload Relays — Thermal Types
16.10 Pilot and Miscellaneous Control Devices
16.11 Interlocks

Chapter 17 Insulated-Case/Molded-Case Circuit-Breakers

17.1 Introduction
17.2 Application Considerations
17.3 Phase-Fault Current Conditions
17.4 Ground-Fault Tripping
17.5 Types of Insulated-Case/Molded-Case Circuit Breakers
17.6 Special-Purpose Breakers
17.7 Types of Maintenance
17.8 Inspection and Cleaning
17.9 Loose Connections
17.10 Mechanical Mechanism Exercise
17.11 Electrical Testing

Chapter 18 Fuses

18.1 Fuses Rated 1000 Volts or Less
18.2 Fuses Rated over 1000 Volts

Chapter 19 Power Cables

19.1 Introduction
19.2 Visual Inspection
19.3 Aerial Installations
19.4 Raceway Installations
19.5 Testing

Chapter 20 Cable Tray and Busway

20.1 Introduction
20.2 Cable
20.3 Cable Tray
20.4 Low-Voltage (600-Volt) Busway

Chapter 21 Power and Distribution Transformers

21.1 Introduction
21.2 Liquid-Filled Transformers
21.3 Dry-Type Transformers

Chapter 22 Electronic Equipment

22.1 Introduction
22.2 Reasons for Maintenance
22.3 Special Precautions
22.4 Preventive Maintenance Operations

Chapter 23 Lighting

23.1 Introduction
23.2 Cleaning
23.3 Relamping
23.4 Voltage
23.5 Lamps and Ballasts
23.6 Disposal

Chapter 24 Wiring Devices

24.1 Introduction
24.2 Connector and Receptacle
24.3 Receptacles
24.4 Adapters
24.5 General-Use Snap Switches
24.6 Cover Plates
24.7 Boxes
24.8 Pin and Sleeve Devices

Chapter 25 Rotating Equipment

25.1 Introduction
25.2 Safety Precautions
25.3 Stator and Rotor Windings
25.4 Brushes, Collector Rings, and Commutators
25.5 Bearings and Lubrication
25.6 Cleaning and Drying Insulation Structures
25.7 General Overhaul
25.8 Records
25.9 Testing
25.10 Energy Efficiency of Motors

Chapter 26 Vibration

26.1 Introduction
26.2 Machine Vibration
26.3 Types of Instruments
26.4 Resonance
26.5 Methods of Balance
26.6 Assembly and Installation Guidelines
26.7 Baseline Data
26.8 Noise

Chapter 27 Hazardous (Classified) Location Electrical Equipment

27.1 Types of Equipment
27.2 Maintenance of Electrical Equipment for Use in Hazardous (Classified) Locations

Chapter 28 Uninterruptible Power Supply (UPS) Systems

28.1 Introduction
28.2 Types of UPS Systems
28.3 UPS System Maintenance Procedures — General
28.4 UPS Testing
28.5 System Tests

Chapter 29 Portable Electrical Tools and Equipment

29.1 Introduction
29.2 Employee Training
29.3 Maintenance
29.4 Cord and Attachment Plug Care
29.5 Extension Cords
29.6 Major Overhauls
29.7 Leakage Current Testing

Chapter 30 Reliability-Centered Maintenance (RCM)

30.1 Reliability-Centered Maintenance (RCM)
30.2 Operations and Maintenance (O&M) Documentation
30.3 Technical Support
30.4 Availability Metric.

Chapter 31 EPM from Commissioning (Acceptance Testing) Through Maintenance

31.1 Introduction
31.2 Purpose
31.3 Requirements
31.4 Commissioning Planning Stages
31.5 Developing of Functional Performance Tests (FPTs)
31.6 Testing Implementation
31.7 Costs of Commissioning

Annex A Explanatory Material
Annex B How to Instruct
Annex C Bibliography
Annex D Informational References
Annex E Suggestions for Inclusion in a Walk-Through Inspection Checklist
Annex F Symbols
Annex G Diagrams
Annex H Forms
Annex I NEMA Configurations
Annex J Primary Contact Matrix
Annex K Long-Term Maintenance Guidelines
Annex L Maintenance Intervals
Annex M Equipment Storage and Maintenance During Construction
Annex N Reliability Centered Maintenance
Annex O Energy Efficiency of Motors
Annex P Identification of Transformers by Cooling Class
Index