NFPA 70B: Recommended Practice for Electrical Equipment Maintenance

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2016 NFPA 70B
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Equipment maintenance impacts safety, downtime, and the cost of repairs. NFPA 70B works hand-in-hand with NFPA 70E® to help protect your personnel, your facility, and your business!

Electrical systems are the lifeblood of your work, and proper maintenance is essential to the safety of your facility and your employees. Get guidance you can trust in NFPA 70B: Recommended Practice for Electrical Equipment Maintenance. Used alongside the requirements in NFPA 70E®: Standard for Electrical Safety in the Workplace®, NFPA 70B helps facility managers develop and carry out an effective Electrical Preventive Maintenance (EPM) program for all types of equipment and assemblies. Contractors look to NFPA 70B for information about properly servicing equipment, and designers depend on it for developing specifications for installation that take maintenance into account.

NFPA 70B's chapters cover it all:

  • Planning and developing an Electrical Preventive Maintenance (EPM) program
  • Personnel safety
  • Fundamentals of electrical equipment maintenance
  • System studies
  • Power quality
  • Testing and test methods
  • Maintenance of electrical equipment subject to long intervals between shutdowns
  • Ground-fault protection
  • Grounding
  • Plus detailed chapters on many different types of assemblies, equipment, cables, and devices

Changes in the 2016 edition help you guard against electrical incidents and system failures.

Loose connections are a significant contributor to maintenance issues. That's why the 2016 edition of NFPA 70B includes new torque requirements that help minimize risks related to poor connections, which have the potential to cause overheating, intermittent open circuits, and electrical arcs. In another change, enhanced battery testing and maintenance requirements provide greater detail about battery testing and safety considerations for anyone performing battery maintenance. Batteries are part of many electrical systems and some are critical to power systems involved in life safety.

Keep your eye on safety and the bottom line. Maintain equipment and develop your EPM using NFPA 70B, featuring the latest guidance from the field. (Softbound, 297 pp., 2016)

NFPA® 70B Recommended Practice for Electrical Equipment Maintenance, 2016 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).
6.10 Counterfeit Components, Devices, Tools, and Equipment.
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.
8.11 Threaded Connections and Terminations.
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.
9.6 Risk Assessment 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.
11.27 Test or Calibration Decal System.
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 and Mechanical Inspection.
19.3 Aerial Installations.
19.4 Raceway Installations.
19.5 Electrical Testing.
19.6 Inspection and Testing Records.
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 Tool 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 General.
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.
Chapter 32 Electrical Disaster Recovery
32.1 Introduction.
32.2 Catastrophic Event Categories.
Chapter 33 Photovoltaic Systems
33.1 Introduction.
33.2 Maintenance of the Photovoltaic System.
33.3 Markings and Labeling.
Chapter 34 Electric Vehicle Charging Systems
34.1 Introduction.
34.2 Maintenance of the Electric Vehicle Charging Stations.
Chapter 35 Wind Power Electric Systems and Associated Equipment
35.1 Introduction.
35.2 Towers and Foundations.
35.3 Yaw Systems.
35.4 Generators.
35.5 Pitch Systems.
35.6 Instrumentation and Controls.
35.7 Supervisory Control and Data Acquisition System (SCADA).
35.8 Transformers and Converters.
35.9 Circuit Breakers.
35.10 Cable Support Systems, Cables, and Terminations.
35.11 Collector Substations and Switchgear.
35.12 Associated Electrical Equipment.
35.13
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
Annex Q Case Histories