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  • NFPA 70B : 2016

    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE

    Available format(s):  Hardcopy

    Superseded date:  18-12-2018

    Language(s):  English

    Published date:  01-01-2016

    Publisher:  National Fire Protection Association

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    Table of Contents - (Show below) - (Hide below)

    Chapter 1 - Administration
    Chapter 2 - Referenced Publications
    Chapter 3 - Definitions
    Chapter 4 - Why an Effective Electrical Preventive
                 Maintenance (EPM) Program Pays Dividends
    Chapter 5 - What Is an Effective Electrical Preventive
                 Maintenance (EPM) Program?
    Chapter 6 - Planning and Developing an Electrical
                 Preventive Maintenance (EPM) Program
    Chapter 7 - Personnel Safety
    Chapter 8 - Fundamentals of Electrical Equipment
                 Maintenance
    Chapter 9 - System Studies
    Chapter 10 - Power Quality
    Chapter 11 - Testing and Test Methods
    Chapter 12 - Maintenance of Electrical Equipment
                 Subject to Long Intervals Between Shutdowns
    Chapter 13 - Ground-Fault Protection
    Chapter 14 - Grounding
    Chapter 15 - Substations and Switchgear Assemblies
    Chapter 16 - Motor Control Equipment
    Chapter 17 - Insulated-Case/Molded-Case
                 Circuit-Breakers
    Chapter 18 - Fuses
    Chapter 19 - Power Cables
    Chapter 20 - Cable Tray and Busway
    Chapter 21 - Power and Distribution Transformers
    Chapter 22 - Electronic Equipment
    Chapter 23 - Lighting
    Chapter 24 - Wiring Devices
    Chapter 25 - Rotating Equipment
    Chapter 26 - Vibration
    Chapter 27 - Hazardous (Classified) Location Electrical
                 Equipment
    Chapter 28 - Uninterruptible Power Supply (UPS)
                 Systems
    Chapter 29 - Portable Electrical Tools and Equipment
    Chapter 30 - Reliability-Centered Maintenance (RCM)
    Chapter 31 - EPM from Commissioning (Acceptance
                 Testing) Through Maintenance
    Chapter 32 - Electrical Disaster Recovery
    Chapter 33 - Photovoltaic Systems
    Chapter 34 - Electric Vehicle Charging Systems
    Chapter 35 - Wind Power Electric Systems and
                 Associated Equipment
    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
    Index

    Abstract - (Show below) - (Hide below)

    This recommended practice applies to preventive main‐ tenance for electrical, electronic, and communication systems and equipment and is not intended to duplicate or supersede instructions that manufacturers normally provide.

    General Product Information - (Show below) - (Hide below)

    Development Note Also available with NFPA 70E. Also available with NFPA 70 and NFPA 70E. Also available with NFPA 70E and NFPA 79. (08/2011) 2016 Edition is also available in Spanish Language, See NFPA 70B SPANISH. (08/2017)
    Document Type Standard
    Publisher National Fire Protection Association
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    UFC 3-501-01 : 2015 UNIFIED FACILITIES CRITERIA - ELECTRICAL ENGINEERING
    API RP 1604 : 1996 CLOSURE OF UNDERGROUND PETROLEUM STORAGE TANKS
    IEEE 3007.3 : 2012 RECOMMENDED PRACTICE FOR ELECTRICAL SAFETY IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    IEEE 1242 : 1999 GUIDE FOR SPECIFYING AND SELECTING POWER, CONTROL AND SPECIAL-PURPOSE CABLE FOR PETROLEUM AND CHEMICAL PLANTS
    NFPA 110 HDBK : 2016 EMERGENCY AND STANDBY POWER SYSTEMS HANDBOOK
    IEEE 3004.8:2016 MOTOR PROTECTION IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    CSA Z463 : 2013 GUIDELINE ON MAINTENANCE OF ELECTRICAL SYSTEMS
    IEEE 1578 : 2007 STATIONARY BATTERY ELECTROLYTE SPILL CONTAINMENT AND MANAGEMENT
    NFPA 914 : 2015 FIRE PROTECTION OF HISTORIC STRUCTURES
    NFPA 780 : 2017 INSTALLATION OF LIGHTNING PROTECTION SYSTEMS
    NFPA 502 : 2017 ROAD TUNNELS, BRIDGES, AND OTHER LIMITED ACCESS HIGHWAYS
    UFC 3-560-01 : Change 1 UNIFIED FACILITIES CRITERIA (UFC) - OPERATION AND MAINTENANCE: ELECTRICAL SAFETY
    C22.1-15 PACKAGE Consists of C22.1-15, Canadian electrical code, part I (23rd edition), safety standard for electrical installations; C22.1HB-15, Canadian electrical code handbook - an explanation of rules of the Canadian electrical code, part I and the 2015 Electrical quick reference
    NETA ATS : 2017 ACCEPTANCE TESTING SPECIFICATIONS FOR ELECTRICAL POWER EQUIPMENT AND SYSTEMS
    API 500 RUSSIAN :1997 RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2
    API 500 RUSSIAN : 1997 : R2002 RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2
    NFPA 59A : 2016 PRODUCTION, STORAGE, AND HANDLING OF LIQUEFIED NATURAL GAS (LNG)
    NFPA 820 : 2016 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIES
    NFPA 909 : 2017 PROTECTION OF CULTURAL RESOURCE PROPERTIES - MUSEUMS, LIBRARIES, AND PLACES OF WORSHIP
    IEEE 3004.5 : 2014 RECOMMENDED PRACTICE FOR THE APPLICATION OF LOW-VOLTAGE CIRCUIT BREAKERS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    CSA M421 : 2011 USE OF ELECTRICITY IN MINES
    Z462-18 Workplace electrical safety
    NFPA 1 : 2021 FIRE CODE
    C22.1HB-18 Canadian Electrical Code Handbook - An Explanation of the Rules of the Canadian Electrical Code, Part I
    ANSI/ASSP A10.8 : 2011 SCAFFOLDING SAFETY REQUIREMENTS
    NEMA SG 10 : 2013 GUIDE TO OSHA AND NFPA 70E SAFETY REQUIREMENTS WHEN SERVICING AND MAINTAINING MEDIUM-VOLTAGE SWITCHGEAR, CIRCUIT BREAKERS, AND MEDIUM-VOLTAGE CONTROLLERS RATED ABOVE 1000 V
    NEMA KS 3-2010 Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercial and Industrial Applications
    NEMA KS 1-2013 Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum)
    ANSI/NEMA KS 2-2013 Distribution Equipment Switch Application Guide, A User\'s Reference
    NEMA ICS 1.3-1986 (R2001, R2009, R2015, R2020) Preventive Maintenance of Industrial Control and Systems Equipment
    UFC 3-575-01 : 2012 UNIFIED FACILITIES CRITERIA - LIGHTNING AND STATIC ELECTRICITY PROTECTION SYSTEMS
    NEMA LSD 27-2012 Best Practices for Operating Fluorescent Lighting Systems
    NEMA SG 11 : 2013 GUIDE FOR HANDLING AND MAINTENANCE OF ALTERNATING CURRENT OUTDOOR HIGH-VOLTAGE CIRCUIT BREAKERS
    NEMA SG 4-2009 (R2013) ALTERNATING CURRENT HIGH-VOLTAGE CIRCUIT BREAKERS
    ANSI/NEMA AB 3-2013 Molded-Case Circuit Breakers and Their Application
    IEEE 3006.3 : 2017 RECOMMENDED PRACTICE FOR DETERMINING THE IMPACT OF PREVENTATIVE MAINTENANCE ON THE RELIABILITY OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    EEE 602 : 2007 ELECTRIC SYSTEMS IN HEALTH CARE FACILITIES
    UFC 3-550-01 : CHANGE 1 UNIFIED FACILITIES CRITERIA - EXTERIOR ELECTRICAL POWER DISTRIBUTION
    API 1604 : 1996 : R2010 CLOSURE OF UNDERGROUND PETROLEUM STORAGE TANKS
    RMA B28.9 : 1983 AMERICAN NATIONAL STANDARDS FOR RUBBER MACHINERY LET-OFF EQUIPMENT FOR RUBBER HOSE - SAFETY REQUIREMENTS FOR CONSTRUCTION, CAR AND USE
    CSA C22.4 No. 1 : 2009(R2018) OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE
    IEEE DRAFT C37.20.4 : 2001 DRAFT STANDARD FOR INDOOR AC SWITCHES RATED ABOVE 1KV THROUGH 38KV FOR USE IN METAL-ENCLOSED SWITCHGEAR
    NFPA 1902 : 1991 INITIAL ATTACK FIRE APPARATUS
    IEC TS 62446-3:2017 Photovoltaic (PV) systems - Requirements for testing, documentation and maintenance - Part 3: Photovoltaic modules and plants - Outdoor infrared thermography
    API 14F : 2008 : R2013 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    IEEE 1458-2005 SELECTION, FIELD TESTING, AND LIFE EXPECTANCY OF MOLDED-CASE CIRCUIT BREAKERS FOR INDUSTRIAL APPLICATIONS
    CSA M421 : 2011 : R2016 USE OF ELECTRICITY IN MINES
    ANSI E1.32 : 2012(R2017) GUIDE FOR THE INSPECTION OF ENTERTAINMENT INDUSTRY INCANDESCENT LAMP LUMINAIRES
    CSA CE CODE SAFETY PACKAGE : 2012 CE CODE SAFETY PACKAGE
    C22.10-10 Québec Construction Code, Chapter V - Electricity Canadian Electrical Code, Part I (Twenty-first Edition) with Québec Amendments
    CSA C22.4 PACKAGE : 2009 CONSISTS OF C22.4 NO. 1-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE AND C22.4 NO. 2-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE - SAFETY MANAGEMENT SYSTEM REQUIREMENTS
    RMA B28.7 : 1983 TAKEOFF EQUIPMENT FOR RUBBER HOSE - SAFETY REQUIREMENTS FOR CONSTRUCTION, CARE, AND USE
    IEEE 1184-2006 GUIDE FOR BATTERIES FOR UNINTERRUPTIBLE POWER SUPPLY SYSTEMS
    IEEE C37.121-2012 GUIDE FOR SWITCHGEAR - UNIT SUBSTATION - REQUIREMENTS
    IEEE 1205 :2014 GUIDE FOR ASSESSING, MONITORING AND MITIGATING AGING EFFECTS ON ELECTRICAL EQUIPMENT USED IN NUCLEAR POWER GENERATING STATIONS AND OTHER NUCLEAR FACILITIES
    IEEE 3006.2 : 2016 RECOMMENDED PRACTICE FOR EVALUATING THE RELIABILITY OF EXISTING INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    NFPA 1904 : 1991 AERIAL LADDER AND ELEVATING PLATFORM FIRE APPARATUS
    API 505 : 1997 RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS I, ZONE 0, ZONE 1, AND ZONE 2
    RMA B28.8 : 1983 RUBBER MACHINERY - WINDUP EQUIPMENT FOR RUBBER HOSE - SAFETY REQUIREMENTS FOR CONSTRUCTION, CARE AND USE
    IEEE DRAFT 602 : D2 2006 ELECTRIC SYSTEMS IN HEALTH CARE FACILITIES
    API 14F:2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    IEEE 1147 : 2005 GUIDE FOR THE REHABILITATION OF HYDROELECTRIC POWER PLANTS
    NFPA 70E : 2018 ELECTRICAL SAFETY IN THE WORKPLACE
    ANSI/ASSE A10.8 REDLINE : 2011 COMPARISON DOCUMENT OF A10.8 AMERICAN NATIONAL STANDARD - SCAFFOLDING SAFETY REQUIREMENTS (FOR VERSIONS 2001 AND 2011)
    IEEE 1683 : 2014 GUIDE FOR MOTOR CONTROL CENTERS RATED UP TO AND INCLUDING 600 V AC OR 1000 V DC WITH RECOMMENDATIONS INTENDED TO HELP REDUCE ELECTRICAL HAZARDS
    RMA B28.6 : 1983 REINFORCING MACHINERY FOR RUBBER HOSE - SAFETY REQUIREMENTS FOR CONSTRUCTION, CARE, AND USE
    ANSI C37.121 : 2012 AMERICAN NATIONAL STANDARD FOR SWITCHGEAR - UNIT SUBSTATIONS - REQUIREMENTS
    IEEE C37.20.4 : 2013 INDOOR AC SWITCHES (1 KV TO 38 KV) FOR USE IN METAL-ENCLOSED SWITCHGEAR
    IEEE 2030.2 : 2015 GUIDE FOR THE INTEROPERABILITY OF ENERGY STORAGE SYSTEMS INTEGRATED WITH THE ELECTRIC POWER INFRASTRUCTURE
    API 14FZ : 2013 RECOMMENDED PRACTICE FOR DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, ZONE 0, ZONE 1, AND ZONE 2 LOCATIONS
    API 500 : 2012 RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS 1, DIVISION 1 AND DIVISION 2
    API 14F REDLINE : 2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    NFPA 1 : 2018 FIRE CODE
    IEEE C37.21-2005 CONTROL SWITCHBOARDS
    C22.1-18 Canadian Electrical Code, Part I (24th Edition), Safety Standard for Electrical Installations

    Standards Referencing This Book - (Show below) - (Hide below)

    IEEE 519 : 2014 RECOMMENDED PRACTICES AND REQUIREMENTS FOR HARMONIC CONTROL IN ELECTRICAL POWER SYSTEMS
    IEEE C37.20.1:2015 METAL-ENCLOSED LOW-VOLTAGE (1000 VAC AND BELOW, 3200 VDC AND BELOW) POWER CIRCUIT BREAKER SWITCHGEAR
    IEEE C37.95 : 2014 GUIDE FOR PROTECTIVE RELAYING OF UTILITY-CONSUMER INTERCONNECTIONS
    IEEE 1578 : 2007 STATIONARY BATTERY ELECTROLYTE SPILL CONTAINMENT AND MANAGEMENT
    NEMA ICS 7 : 2014 INDUSTRIAL CONTROL AND SYSTEMS: ADJUSTABLE - SPEED DRIVES
    NEMA MG 1 : 2016 MOTORS AND GENERATORS
    NEMA MG 2-2014 Safety Standard for Construction and Guide for Selection, Installation and Use of Electric Motors and Generators
    NEMA ICS 1.3-1986 (R2001, R2009, R2015, R2020) Preventive Maintenance of Industrial Control and Systems Equipment
    IEEE 1409 : 2012 GUIDE FOR APPLICATION OF POWER ELECTRONICS FOR POWER QUALITY IMPROVEMENT ON DISTRIBUTION SYSTEMS RATED 1 KV THROUGH 38 KV
    ASTM D 1816 : 2012 : REDLINE Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using VDE Electrodes
    NFPA 780 : 2017 INSTALLATION OF LIGHTNING PROTECTION SYSTEMS
    NFPA 110 : 2016 EMERGENCY AND STANDBY POWER SYSTEMS
    CFR 29(PTS1900-1910) : 0 LABOR - OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
    API GIRE CH1 : 2ED 76 INSPECTION OF REFINERY EQUIPMENT - INTRODUCTION
    IEEE 81-2012 GUIDE FOR MEASURING EARTH RESISTIVITY, GROUND IMPEDANCE, AND EARTH SURFACE POTENTIALS OF A GROUND SYSTEM
    IEEE 1159 : 2009 RECOMMENDED PRACTICE FOR MONITORING ELECTRIC POWER QUALITY
    IEEE 1106-2015 RECOMMENDED PRACTICE FOR INSTALLATION, MAINTENANCE, TESTING, AND REPLACEMENT OF VENTED NICKEL- CADMIUM BATTERIES FOR STATIONARY APPLICATIONS
    IEEE 1657 : 2009 RECOMMENDED PRACTICE FOR PERSONNEL QUALIFICATIONS FOR INSTALLATION AND MAINTENANCE OF STATIONARY BATTERIES
    IEEE 400.1 : 2007 GUIDE FOR FIELD TESTING OF LAMINATED DIELECTRIC, SHIELDED POWER CABLE SYSTEMS RATED 5 KV AND ABOVE WITH HIGH DIRECT CURRENT VOLTAGE
    ASTM D 924 : 2015 : REDLINE Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
    NETA ATS : 2017 ACCEPTANCE TESTING SPECIFICATIONS FOR ELECTRICAL POWER EQUIPMENT AND SYSTEMS
    IEEE C57.12.00-2015 STANDARD FOR GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    CFR 29(PTS1920-END) : 1986 LABOR - OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
    NETA MTS : 2011 MAINTENANCE TESTING SPECIFICATIONS FOR ELECTRICAL POWER EQUIPMENT AND SYSTEMS
    UL 943 : 5 GROUND-FAULT CIRCUIT-INTERRUPTERS
    IEEE 493 : 2007 DESIGN OF RELIABLE INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    NFPA 496 : 2017 PURGED AND PRESSURIZED ENCLOSURES FOR ELECTRICAL EQUIPMENT
    UL 489 : 2013 MOLDED-CASE CIRCUIT BREAKERS, MOLDED-CASE SWITCHES, AND CIRCUIT-BREAKER ENCLOSURES
    IEEE 400.2 : 2013 GUIDE FOR FIELD TESTING OF SHIELDED POWER CABLE SYSTEMS USING VERY LOW FREQUENCY (VLF) (LESS THAN 1 HZ)
    IEEE 1453-2015 REDLINE IEEE Recommended Practice for the Analysis of Fluctuating Installations on Power Systems
    IEEE 1125 : 1993 GUIDE FOR MEASUREMENT AND CONTROL IN SF[6] GAS-INSULATED EQUIPMENT
    NFPA 1600 : 2016 DISASTER/EMERGENCY MANAGEMENT AND BUSINESS CONTINUITY/CONTINUITY OF OPERATIONS PROGRAMS
    ANSI/NEMA PB 2.1-2013 General Instructions for Proper Handling, Installation, Operation and Maintenance of Deadfront Distribution Switchboards Rated 600 Volts or Less
    ASTM D 2129 : 2017 : REDLINE Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
    ASTM D 1533 : 2012 : REDLINE Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration
    UL 1436 : 6 OUTLET CIRCUIT TESTERS AND SIMILAR INDICATING DEVICES
    NEMA 280 : 1990 APPLICATION GUIDE FOR GROUND FAULT CIRCUIT INTERRUPTERS
    IEEE C57.104 : 2008 INTERPRETATION OF GASES GENERATED IN OIL-IMMERSED TRANSFORMERS
    MIL STD 339 : 0 WIRING AND WIRING DEVICES FOR COMBAT AND TACTICAL VEHICLES, SELECTION AND INSTALLATION OF
    IEEE 637 : 1985 RECLAMATION OF INSULATING OIL AND CRITERIA FOR ITS USE, GUIDE FOR THE
    IEEE C37.13 : 2015 LOW-VOLTAGE AC POWER CIRCUIT BREAKERS USED IN ENCLOSURES
    IEEE 80-2013 GUIDE FOR SAFETY IN AC SUBSTATION GROUNDING
    IEEE C37.122.1 : 2014 GAS-INSULATED SUBSTATIONS RATED ABOVE 52 KV
    ANSI C84.1 : 2016 ELECTRIC POWER SYSTEMS AND EQUIPMENT - VOLTAGE RATINGS (60 HERTZ)
    NEMA WD 6 : 2016 WIRING DEVICES - DIMENSIONAL SPECIFICATIONS
    IEEE 95-2002 RECOMMENDED PRACTICE FOR INSULATION TESTING OF AC ELECTRIC MACHINERY (2300 V AND ABOVE) WITH HIGH DIRECT VOLTAGE
    CFR 40(PTS700-789) : JUL 2016 PROTECTION OF ENVIRONMENT - ENVIRONMENTAL PROTECTION AGENCY
    NFPA 70E : 2018 ELECTRICAL SAFETY IN THE WORKPLACE
    IEEE 142 : 2007 GROUNDING OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    ASTM D 2472 : 2015 : REDLINE Standard Specification for Sulfur Hexafluoride
    ANSI/NEMA PB 1.1-2013 General Instructions for Proper Installation, Operation and Maintenance of Panelboards Rated 600 V or Less
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    ASTM D 1524 : 2015 : REDLINE Standard Test Method for Visual Examination of Used Electrical Insulating Liquids in the Field
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    NEMA AB 4-2017 Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications
    IEC 60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers
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    IEEE 1250:2011 GUIDE FOR IDENTIFYING AND IMPROVING VOLTAGE QUALITY IN POWER SYSTEMS
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